Gnn data processing supports distributed scenarios

cmake/mind_expression.cmake

@@ -15,7 +15,14 @@ include(${CMAKE_SOURCE_DIR}/cmake/external_libs/json.cmake)
 include(${CMAKE_SOURCE_DIR}/cmake/dependency_securec.cmake)
 include(${CMAKE_SOURCE_DIR}/cmake/external_libs/protobuf.cmake)
 
+SET(MS_BUILD_GRPC 0)
 if (ENABLE_DEBUGGER OR ENABLE_SERVING OR ENABLE_TESTCASES)
+    SET(MS_BUILD_GRPC 1)
+endif()
+if (ENABLE_MINDDATA AND NOT CMAKE_SYSTEM_NAME MATCHES "Windows")
+    SET(MS_BUILD_GRPC 1)
+endif()
+if ("${MS_BUILD_GRPC}")
     # build dependencies of gRPC
     include(${CMAKE_SOURCE_DIR}/cmake/external_libs/absl.cmake)
     include(${CMAKE_SOURCE_DIR}/cmake/external_libs/c-ares.cmake)

mindspore/ccsrc/minddata/dataset/CMakeLists.txt

@@ -83,6 +83,7 @@ endif()
 if (ENABLE_TDTQUE)
     add_dependencies(engine-tdt core)
 endif ()
+
 ################### Create _c_dataengine Library ######################
 set(submodules
     $<TARGET_OBJECTS:core>
@@ -182,3 +183,7 @@ else()
         set_target_properties(_c_dataengine PROPERTIES MACOSX_RPATH ON)
     endif ()
 endif()
+
+if (NOT CMAKE_SYSTEM_NAME MATCHES "Windows")
+    target_link_libraries(_c_dataengine PRIVATE mindspore::grpc++)
+endif()

mindspore/ccsrc/minddata/dataset/api/python/bindings/dataset/engine/gnn/bindings.cc

@@ -18,83 +18,103 @@
 #include "pybind11/stl_bind.h"
 
 #include "minddata/dataset/api/python/pybind_register.h"
-
+#include "minddata/dataset/engine/gnn/graph_data_client.h"
-#include "minddata/dataset/engine/gnn/graph.h"
+#include "minddata/dataset/engine/gnn/graph_data_impl.h"
+#include "minddata/dataset/engine/gnn/graph_data_server.h"
 
 namespace mindspore {
 namespace dataset {
 
 PYBIND_REGISTER(
   Graph, 0, ([](const py::module *m) {
-    (void)py::class_<gnn::Graph, std::shared_ptr<gnn::Graph>>(*m, "Graph")
+    (void)py::class_<gnn::GraphData, std::shared_ptr<gnn::GraphData>>(*m, "GraphDataClient")
-      .def(py::init([](std::string dataset_file, int32_t num_workers) {
+      .def(py::init([](const std::string &dataset_file, int32_t num_workers, const std::string &working_mode,
-        std::shared_ptr<gnn::Graph> g_out = std::make_shared<gnn::Graph>(dataset_file, num_workers);
+                       const std::string &hostname, int32_t port) {
-        THROW_IF_ERROR(g_out->Init());
+        std::shared_ptr<gnn::GraphData> out;
-        return g_out;
+        if (working_mode == "local") {
+          out = std::make_shared<gnn::GraphDataImpl>(dataset_file, num_workers);
+        } else if (working_mode == "client") {
+          out = std::make_shared<gnn::GraphDataClient>(dataset_file, hostname, port);
+        }
+        THROW_IF_ERROR(out->Init());
+        return out;
       }))
       .def("get_all_nodes",
-           [](gnn::Graph &g, gnn::NodeType node_type) {
+           [](gnn::GraphData &g, gnn::NodeType node_type) {
              std::shared_ptr<Tensor> out;
              THROW_IF_ERROR(g.GetAllNodes(node_type, &out));
              return out;
            })
       .def("get_all_edges",
-           [](gnn::Graph &g, gnn::EdgeType edge_type) {
+           [](gnn::GraphData &g, gnn::EdgeType edge_type) {
              std::shared_ptr<Tensor> out;
              THROW_IF_ERROR(g.GetAllEdges(edge_type, &out));
              return out;
            })
       .def("get_nodes_from_edges",
-           [](gnn::Graph &g, std::vector<gnn::NodeIdType> edge_list) {
+           [](gnn::GraphData &g, std::vector<gnn::NodeIdType> edge_list) {
              std::shared_ptr<Tensor> out;
              THROW_IF_ERROR(g.GetNodesFromEdges(edge_list, &out));
              return out;
            })
       .def("get_all_neighbors",
-           [](gnn::Graph &g, std::vector<gnn::NodeIdType> node_list, gnn::NodeType neighbor_type) {
+           [](gnn::GraphData &g, std::vector<gnn::NodeIdType> node_list, gnn::NodeType neighbor_type) {
              std::shared_ptr<Tensor> out;
              THROW_IF_ERROR(g.GetAllNeighbors(node_list, neighbor_type, &out));
              return out;
            })
       .def("get_sampled_neighbors",
-           [](gnn::Graph &g, std::vector<gnn::NodeIdType> node_list, std::vector<gnn::NodeIdType> neighbor_nums,
+           [](gnn::GraphData &g, std::vector<gnn::NodeIdType> node_list, std::vector<gnn::NodeIdType> neighbor_nums,
               std::vector<gnn::NodeType> neighbor_types) {
              std::shared_ptr<Tensor> out;
              THROW_IF_ERROR(g.GetSampledNeighbors(node_list, neighbor_nums, neighbor_types, &out));
              return out;
            })
       .def("get_neg_sampled_neighbors",
-           [](gnn::Graph &g, std::vector<gnn::NodeIdType> node_list, gnn::NodeIdType neighbor_num,
+           [](gnn::GraphData &g, std::vector<gnn::NodeIdType> node_list, gnn::NodeIdType neighbor_num,
               gnn::NodeType neg_neighbor_type) {
              std::shared_ptr<Tensor> out;
              THROW_IF_ERROR(g.GetNegSampledNeighbors(node_list, neighbor_num, neg_neighbor_type, &out));
              return out;
            })
       .def("get_node_feature",
-           [](gnn::Graph &g, std::shared_ptr<Tensor> node_list, std::vector<gnn::FeatureType> feature_types) {
+           [](gnn::GraphData &g, std::shared_ptr<Tensor> node_list, std::vector<gnn::FeatureType> feature_types) {
              TensorRow out;
              THROW_IF_ERROR(g.GetNodeFeature(node_list, feature_types, &out));
              return out.getRow();
            })
       .def("get_edge_feature",
-           [](gnn::Graph &g, std::shared_ptr<Tensor> edge_list, std::vector<gnn::FeatureType> feature_types) {
+           [](gnn::GraphData &g, std::shared_ptr<Tensor> edge_list, std::vector<gnn::FeatureType> feature_types) {
              TensorRow out;
              THROW_IF_ERROR(g.GetEdgeFeature(edge_list, feature_types, &out));
              return out.getRow();
            })
       .def("graph_info",
-           [](gnn::Graph &g) {
+           [](gnn::GraphData &g) {
              py::dict out;
              THROW_IF_ERROR(g.GraphInfo(&out));
              return out;
            })
       .def("random_walk",
-           [](gnn::Graph &g, std::vector<gnn::NodeIdType> node_list, std::vector<gnn::NodeType> meta_path,
+           [](gnn::GraphData &g, std::vector<gnn::NodeIdType> node_list, std::vector<gnn::NodeType> meta_path,
               float step_home_param, float step_away_param, gnn::NodeIdType default_node) {
              std::shared_ptr<Tensor> out;
              THROW_IF_ERROR(g.RandomWalk(node_list, meta_path, step_home_param, step_away_param, default_node, &out));
              return out;
-           });
+           })
+      .def("stop", [](gnn::GraphData &g) { THROW_IF_ERROR(g.Stop()); });
+
+    (void)py::class_<gnn::GraphDataServer, std::shared_ptr<gnn::GraphDataServer>>(*m, "GraphDataServer")
+      .def(py::init([](const std::string &dataset_file, int32_t num_workers, const std::string &hostname, int32_t port,
+                       int32_t client_num, bool auto_shutdown) {
+        std::shared_ptr<gnn::GraphDataServer> out;
+        out =
+          std::make_shared<gnn::GraphDataServer>(dataset_file, num_workers, hostname, port, client_num, auto_shutdown);
+        THROW_IF_ERROR(out->Init());
+        return out;
+      }))
+      .def("stop", [](gnn::GraphDataServer &g) { THROW_IF_ERROR(g.Stop()); })
+      .def("is_stoped", [](gnn::GraphDataServer &g) { return g.IsStoped(); });
   }));
 
 }  // namespace dataset

mindspore/ccsrc/minddata/dataset/engine/gnn/CMakeLists.txt

@@ -1,9 +1,29 @@
 file(GLOB_RECURSE _CURRENT_SRC_FILES RELATIVE ${CMAKE_CURRENT_SOURCE_DIR} "*.cc")
 set_property(SOURCE ${_CURRENT_SRC_FILES} PROPERTY COMPILE_DEFINITIONS SUBMODULE_ID=mindspore::SubModuleId::SM_MD)
-add_library(engine-gnn OBJECT
+set(DATASET_ENGINE_GNN_SRC_FILES
-    graph.cc
+    graph_data_impl.cc
+    graph_data_client.cc
+    graph_data_server.cc
     graph_loader.cc
+    graph_feature_parser.cc
     local_node.cc
     local_edge.cc
     feature.cc
-    )
+)
+
+if (CMAKE_SYSTEM_NAME MATCHES "Windows")
+    add_library(engine-gnn OBJECT ${DATASET_ENGINE_GNN_SRC_FILES})
+else()
+    set(DATASET_ENGINE_GNN_SRC_FILES
+        ${DATASET_ENGINE_GNN_SRC_FILES}
+        tensor_proto.cc
+        grpc_async_server.cc
+        graph_data_service_impl.cc
+        graph_shared_memory.cc)
+
+    ms_protobuf_generate(TENSOR_PROTO_SRCS TENSOR_PROTO_HDRS "gnn_tensor.proto")
+    ms_grpc_generate(GNN_PROTO_SRCS GNN_PROTO_HDRS "gnn_graph_data.proto")
+
+    add_library(engine-gnn OBJECT ${DATASET_ENGINE_GNN_SRC_FILES} ${TENSOR_PROTO_SRCS} ${GNN_PROTO_SRCS})
+    add_dependencies(engine-gnn mindspore::protobuf)
+endif()

mindspore/ccsrc/minddata/dataset/engine/gnn/feature.cc

@@ -19,7 +19,8 @@ namespace mindspore {
 namespace dataset {
 namespace gnn {
 
-Feature::Feature(FeatureType type_name, std::shared_ptr<Tensor> value) : type_name_(type_name), value_(value) {}
+Feature::Feature(FeatureType type_name, std::shared_ptr<Tensor> value, bool is_shared_memory)
+    : type_name_(type_name), value_(value), is_shared_memory_(is_shared_memory) {}
 
 }  // namespace gnn
 }  // namespace dataset

mindspore/ccsrc/minddata/dataset/engine/gnn/feature.h

@@ -31,7 +31,7 @@ class Feature {
   // Constructor
   // @param FeatureType type_name - feature type
   // @param std::shared_ptr<Tensor> value - feature value
-  Feature(FeatureType type_name, std::shared_ptr<Tensor> value);
+  Feature(FeatureType type_name, std::shared_ptr<Tensor> value, bool is_shared_memory = false);
 
   ~Feature() = default;
 
@@ -45,6 +45,7 @@ class Feature {
  private:
   FeatureType type_name_;
   std::shared_ptr<Tensor> value_;
+  bool is_shared_memory_;
 };
 }  // namespace gnn
 }  // namespace dataset

mindspore/ccsrc/minddata/dataset/engine/gnn/gnn_graph_data.proto

@@ -0,0 +1,103 @@
+/**
+ * Copyright 2020 Huawei Technologies Co., Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+syntax = "proto3";
+
+package mindspore.dataset;
+
+import "gnn_tensor.proto";
+
+message GnnClientRegisterRequestPb {
+  int32 pid = 1;
+}
+
+message GnnFeatureInfoPb {
+  int32 type = 1;
+  TensorPb feature = 2;
+}
+
+message GnnClientRegisterResponsePb {
+  string error_msg = 1;
+  string data_schema = 2;
+  int64 shared_memory_key = 3;
+  int64 shared_memory_size = 4;
+  repeated GnnFeatureInfoPb default_node_feature = 5;
+  repeated GnnFeatureInfoPb default_edge_feature = 6;
+}
+
+message GnnClientUnRegisterRequestPb {
+  int32 pid = 1;
+}
+
+message GnnClientUnRegisterResponsePb {
+  string error_msg = 1;
+}
+
+enum GnnOpName {
+  GET_ALL_NODES = 0;
+  GET_ALL_EDGES = 1;
+  GET_NODES_FROM_EDGES = 2;
+  GET_ALL_NEIGHBORS = 3;
+  GET_SAMPLED_NEIGHBORS = 4;
+  GET_NEG_SAMPLED_NEIGHBORS = 5;
+  RANDOM_WALK = 6;
+  GET_NODE_FEATURE = 7;
+  GET_EDGE_FEATURE = 8;
+}
+
+message GnnRandomWalkPb {
+  float p = 1;
+  float q = 2;
+  int32 default_id = 3;
+}
+
+message GnnGraphDataRequestPb {
+  GnnOpName op_name = 1;
+  repeated int32 id = 2; // node id or edge id
+  repeated int32 type = 3; //node type or edge type or neighbor type or feature type
+  repeated int32 number = 4; // samples number
+  TensorPb id_tensor = 5; // input ids ,node id or edge id
+  GnnRandomWalkPb random_walk = 6;
+}
+
+message GnnGraphDataResponsePb {
+  string error_msg = 1;
+  repeated TensorPb result_data = 2;
+}
+
+message GnnMetaInfoRequestPb {
+
+}
+
+message GnnNodeEdgeInfoPb {
+  int32 type = 1;
+  int32 num = 2;
+}
+
+message GnnMetaInfoResponsePb {
+  string error_msg = 1;
+  repeated GnnNodeEdgeInfoPb node_info = 2;
+  repeated GnnNodeEdgeInfoPb edge_info = 3;
+  repeated int32 node_feature_type = 4;
+  repeated int32 edge_feature_type = 5;
+}
+
+service GnnGraphData {
+  rpc ClientRegister(GnnClientRegisterRequestPb) returns (GnnClientRegisterResponsePb);
+  rpc ClientUnRegister(GnnClientUnRegisterRequestPb) returns (GnnClientUnRegisterResponsePb);
+  rpc GetGraphData(GnnGraphDataRequestPb) returns (GnnGraphDataResponsePb);
+  rpc GetMetaInfo(GnnMetaInfoRequestPb) returns (GnnMetaInfoResponsePb);
+}

mindspore/ccsrc/minddata/dataset/engine/gnn/gnn_tensor.proto

@@ -0,0 +1,42 @@
+/**
+ * Copyright 2019 Huawei Technologies Co., Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+syntax = "proto3";
+
+package mindspore.dataset;
+
+enum DataTypePb {
+  DE_PB_UNKNOWN = 0;
+  DE_PB_BOOL = 1;
+  DE_PB_INT8 = 2;
+  DE_PB_UINT8 = 3;
+  DE_PB_INT16 = 4;
+  DE_PB_UINT16 = 5;
+  DE_PB_INT32 = 6;
+  DE_PB_UINT32 = 7;
+  DE_PB_INT64 = 8;
+  DE_PB_UINT64 = 9;
+  DE_PB_FLOAT16 = 10;
+  DE_PB_FLOAT32 = 11;
+  DE_PB_FLOAT64 = 12;
+  DE_PB_STRING = 13;
+}
+
+message TensorPb {
+  repeated int64 dims = 1; // tensor shape info
+  DataTypePb tensor_type = 2; // tensor content data type
+  bytes data = 3; // tensor data
+}

mindspore/ccsrc/minddata/dataset/engine/gnn/graph_data.h

@@ -0,0 +1,134 @@
+/**
+ * Copyright 2020 Huawei Technologies Co., Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#ifndef MINDSPORE_CCSRC_MINDDATA_DATASET_ENGINE_GNN_GRAPH_DATA_H_
+#define MINDSPORE_CCSRC_MINDDATA_DATASET_ENGINE_GNN_GRAPH_DATA_H_
+
+#include <map>
+#include <memory>
+#include <string>
+#include <vector>
+#include <utility>
+
+#include "minddata/dataset/core/tensor.h"
+#include "minddata/dataset/core/tensor_row.h"
+#include "minddata/dataset/engine/gnn/feature.h"
+#include "minddata/dataset/engine/gnn/node.h"
+#include "minddata/dataset/engine/gnn/edge.h"
+#include "minddata/dataset/util/status.h"
+
+namespace mindspore {
+namespace dataset {
+namespace gnn {
+
+struct MetaInfo {
+  std::vector<NodeType> node_type;
+  std::vector<EdgeType> edge_type;
+  std::map<NodeType, NodeIdType> node_num;
+  std::map<EdgeType, EdgeIdType> edge_num;
+  std::vector<FeatureType> node_feature_type;
+  std::vector<FeatureType> edge_feature_type;
+};
+
+class GraphData {
+ public:
+  // Get all nodes from the graph.
+  // @param NodeType node_type - type of node
+  // @param std::shared_ptr<Tensor> *out - Returned nodes id
+  // @return Status - The error code return
+  virtual Status GetAllNodes(NodeType node_type, std::shared_ptr<Tensor> *out) = 0;
+
+  // Get all edges from the graph.
+  // @param NodeType edge_type - type of edge
+  // @param std::shared_ptr<Tensor> *out - Returned edge ids
+  // @return Status - The error code return
+  virtual Status GetAllEdges(EdgeType edge_type, std::shared_ptr<Tensor> *out) = 0;
+
+  // Get the node id from the edge.
+  // @param std::vector<EdgeIdType> edge_list - List of edges
+  // @param std::shared_ptr<Tensor> *out - Returned node ids
+  // @return Status - The error code return
+  virtual Status GetNodesFromEdges(const std::vector<EdgeIdType> &edge_list, std::shared_ptr<Tensor> *out) = 0;
+
+  // All neighbors of the acquisition node.
+  // @param std::vector<NodeType> node_list - List of nodes
+  // @param NodeType neighbor_type - The type of neighbor. If the type does not exist, an error will be reported
+  // @param std::shared_ptr<Tensor> *out - Returned neighbor's id. Because the number of neighbors at different nodes is
+  // different, the returned tensor is output according to the maximum number of neighbors. If the number of neighbors
+  // is not enough, fill in tensor as -1.
+  // @return Status - The error code return
+  virtual Status GetAllNeighbors(const std::vector<NodeIdType> &node_list, NodeType neighbor_type,
+                                 std::shared_ptr<Tensor> *out) = 0;
+
+  // Get sampled neighbors.
+  // @param std::vector<NodeType> node_list - List of nodes
+  // @param std::vector<NodeIdType> neighbor_nums - Number of neighbors sampled per hop
+  // @param std::vector<NodeType> neighbor_types - Neighbor type sampled per hop
+  // @param std::shared_ptr<Tensor> *out - Returned neighbor's id.
+  // @return Status - The error code return
+  virtual Status GetSampledNeighbors(const std::vector<NodeIdType> &node_list,
+                                     const std::vector<NodeIdType> &neighbor_nums,
+                                     const std::vector<NodeType> &neighbor_types, std::shared_ptr<Tensor> *out) = 0;
+
+  // Get negative sampled neighbors.
+  // @param std::vector<NodeType> node_list - List of nodes
+  // @param NodeIdType samples_num - Number of neighbors sampled
+  // @param NodeType neg_neighbor_type - The type of negative neighbor.
+  // @param std::shared_ptr<Tensor> *out - Returned negative neighbor's id.
+  // @return Status - The error code return
+  virtual Status GetNegSampledNeighbors(const std::vector<NodeIdType> &node_list, NodeIdType samples_num,
+                                        NodeType neg_neighbor_type, std::shared_ptr<Tensor> *out) = 0;
+
+  // Node2vec random walk.
+  // @param std::vector<NodeIdType> node_list - List of nodes
+  // @param std::vector<NodeType> meta_path - node type of each step
+  // @param float step_home_param - return hyper parameter in node2vec algorithm
+  // @param float step_away_param - inout hyper parameter in node2vec algorithm
+  // @param NodeIdType default_node - default node id
+  // @param std::shared_ptr<Tensor> *out - Returned nodes id in walk path
+  // @return Status - The error code return
+  virtual Status RandomWalk(const std::vector<NodeIdType> &node_list, const std::vector<NodeType> &meta_path,
+                            float step_home_param, float step_away_param, NodeIdType default_node,
+                            std::shared_ptr<Tensor> *out) = 0;
+
+  // Get the feature of a node
+  // @param std::shared_ptr<Tensor> nodes - List of nodes
+  // @param std::vector<FeatureType> feature_types - Types of features, An error will be reported if the feature type
+  // does not exist.
+  // @param TensorRow *out - Returned features
+  // @return Status - The error code return
+  virtual Status GetNodeFeature(const std::shared_ptr<Tensor> &nodes, const std::vector<FeatureType> &feature_types,
+                                TensorRow *out) = 0;
+
+  // Get the feature of a edge
+  // @param std::shared_ptr<Tensor> edges - List of edges
+  // @param std::vector<FeatureType> feature_types - Types of features, An error will be reported if the feature type
+  // does not exist.
+  // @param Tensor *out - Returned features
+  // @return Status - The error code return
+  virtual Status GetEdgeFeature(const std::shared_ptr<Tensor> &edges, const std::vector<FeatureType> &feature_types,
+                                TensorRow *out) = 0;
+
+  // Return meta information to python layer
+  virtual Status GraphInfo(py::dict *out) = 0;
+
+  virtual Status Init() = 0;
+
+  virtual Status Stop() = 0;
+};
+}  // namespace gnn
+}  // namespace dataset
+}  // namespace mindspore
+#endif  // MINDSPORE_CCSRC_MINDDATA_DATASET_ENGINE_GNN_GRAPH_DATA_H_

mindspore/ccsrc/minddata/dataset/engine/gnn/graph_data_client.cc

@@ -0,0 +1,589 @@
+/**
+ * Copyright 2020 Huawei Technologies Co., Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#include "minddata/dataset/engine/gnn/graph_data_client.h"
+
+#include <unistd.h>
+#include <functional>
+#include <map>
+
+#if !defined(_WIN32) && !defined(_WIN64)
+#include "grpcpp/grpcpp.h"
+#endif
+
+#include "minddata/dataset/core/data_type.h"
+#if !defined(_WIN32) && !defined(_WIN64)
+#include "minddata/dataset/engine/gnn/tensor_proto.h"
+#endif
+
+namespace mindspore {
+namespace dataset {
+namespace gnn {
+
+GraphDataClient::GraphDataClient(const std::string &dataset_file, const std::string &hostname, int32_t port)
+    : dataset_file_(dataset_file),
+      host_(hostname),
+      port_(port),
+      pid_(0),
+#if !defined(_WIN32) && !defined(_WIN64)
+      shared_memory_key_(-1),
+      shared_memory_size_(0),
+      graph_feature_parser_(nullptr),
+      graph_shared_memory_(nullptr),
+#endif
+      registered_(false) {
+}
+
+GraphDataClient::~GraphDataClient() { (void)Stop(); }
+
+Status GraphDataClient::Init() {
+#if defined(_WIN32) || defined(_WIN64)
+  RETURN_STATUS_UNEXPECTED("Graph data client is not supported in Windows OS");
+#else
+  if (!registered_) {
+    std::string server_address;
+    server_address = host_ + ":" + std::to_string(port_);
+    MS_LOG(INFO) << "Graph data client starting. address:" << server_address;
+    pid_ = getpid();
+    grpc::ChannelArguments args;
+    args.SetMaxReceiveMessageSize(-1);
+    std::shared_ptr<grpc::Channel> channel =
+      grpc::CreateCustomChannel(server_address, grpc::InsecureChannelCredentials(), args);
+    stub_ = GnnGraphData::NewStub(channel);
+    Status status = RegisterToServer();
+    while (status.ToString().find("Initializing") != std::string::npos) {
+      MS_LOG(INFO) << "Graph data server is initializing, please wait.";
+      std::this_thread::sleep_for(std::chrono::milliseconds(2000));
+      status = RegisterToServer();
+    }
+    RETURN_IF_NOT_OK(status);
+    MS_LOG(INFO) << "Graph data client successfully registered with server " << server_address;
+  }
+  RETURN_IF_NOT_OK(InitFeatureParser());
+  return Status::OK();
+#endif
+}
+
+Status GraphDataClient::Stop() {
+#if !defined(_WIN32) && !defined(_WIN64)
+  if (registered_) {
+    UnRegisterToServer();
+  }
+#endif
+  return Status::OK();
+}
+
+Status GraphDataClient::GetAllNodes(NodeType node_type, std::shared_ptr<Tensor> *out) {
+#if !defined(_WIN32) && !defined(_WIN64)
+  GnnGraphDataRequestPb request;
+  GnnGraphDataResponsePb response;
+  request.set_op_name(GET_ALL_NODES);
+  request.add_type(static_cast<google::protobuf::int32>(node_type));
+  RETURN_IF_NOT_OK(GetGraphDataTensor(request, &response, out));
+#endif
+  return Status::OK();
+}
+
+Status GraphDataClient::GetAllEdges(EdgeType edge_type, std::shared_ptr<Tensor> *out) {
+#if !defined(_WIN32) && !defined(_WIN64)
+  GnnGraphDataRequestPb request;
+  GnnGraphDataResponsePb response;
+  request.set_op_name(GET_ALL_EDGES);
+  request.add_type(static_cast<google::protobuf::int32>(edge_type));
+  RETURN_IF_NOT_OK(GetGraphDataTensor(request, &response, out));
+#endif
+  return Status::OK();
+}
+
+Status GraphDataClient::GetNodesFromEdges(const std::vector<EdgeIdType> &edge_list, std::shared_ptr<Tensor> *out) {
+#if !defined(_WIN32) && !defined(_WIN64)
+  GnnGraphDataRequestPb request;
+  GnnGraphDataResponsePb response;
+  request.set_op_name(GET_NODES_FROM_EDGES);
+  for (const auto &edge_id : edge_list) {
+    request.add_id(static_cast<google::protobuf::int32>(edge_id));
+  }
+  RETURN_IF_NOT_OK(GetGraphDataTensor(request, &response, out));
+#endif
+  return Status::OK();
+}
+
+Status GraphDataClient::GetAllNeighbors(const std::vector<NodeIdType> &node_list, NodeType neighbor_type,
+                                        std::shared_ptr<Tensor> *out) {
+#if !defined(_WIN32) && !defined(_WIN64)
+  GnnGraphDataRequestPb request;
+  GnnGraphDataResponsePb response;
+  request.set_op_name(GET_ALL_NEIGHBORS);
+  for (const auto &node_id : node_list) {
+    request.add_id(static_cast<google::protobuf::int32>(node_id));
+  }
+  request.add_type(static_cast<google::protobuf::int32>(neighbor_type));
+  RETURN_IF_NOT_OK(GetGraphDataTensor(request, &response, out));
+#endif
+  return Status::OK();
+}
+
+Status GraphDataClient::GetSampledNeighbors(const std::vector<NodeIdType> &node_list,
+                                            const std::vector<NodeIdType> &neighbor_nums,
+                                            const std::vector<NodeType> &neighbor_types, std::shared_ptr<Tensor> *out) {
+#if !defined(_WIN32) && !defined(_WIN64)
+  GnnGraphDataRequestPb request;
+  GnnGraphDataResponsePb response;
+  request.set_op_name(GET_SAMPLED_NEIGHBORS);
+  for (const auto &node_id : node_list) {
+    request.add_id(static_cast<google::protobuf::int32>(node_id));
+  }
+  for (const auto &num : neighbor_nums) {
+    request.add_number(static_cast<google::protobuf::int32>(num));
+  }
+  for (const auto &type : neighbor_types) {
+    request.add_type(static_cast<google::protobuf::int32>(type));
+  }
+  RETURN_IF_NOT_OK(GetGraphDataTensor(request, &response, out));
+#endif
+  return Status::OK();
+}
+
+Status GraphDataClient::GetNegSampledNeighbors(const std::vector<NodeIdType> &node_list, NodeIdType samples_num,
+                                               NodeType neg_neighbor_type, std::shared_ptr<Tensor> *out) {
+#if !defined(_WIN32) && !defined(_WIN64)
+  GnnGraphDataRequestPb request;
+  GnnGraphDataResponsePb response;
+  request.set_op_name(GET_NEG_SAMPLED_NEIGHBORS);
+  for (const auto &node_id : node_list) {
+    request.add_id(static_cast<google::protobuf::int32>(node_id));
+  }
+  request.add_number(static_cast<google::protobuf::int32>(samples_num));
+  request.add_type(static_cast<google::protobuf::int32>(neg_neighbor_type));
+  RETURN_IF_NOT_OK(GetGraphDataTensor(request, &response, out));
+#endif
+  return Status::OK();
+}
+
+Status GraphDataClient::GraphDataClient::RandomWalk(const std::vector<NodeIdType> &node_list,
+                                                    const std::vector<NodeType> &meta_path, float step_home_param,
+                                                    float step_away_param, NodeIdType default_node,
+                                                    std::shared_ptr<Tensor> *out) {
+#if !defined(_WIN32) && !defined(_WIN64)
+  GnnGraphDataRequestPb request;
+  GnnGraphDataResponsePb response;
+  request.set_op_name(RANDOM_WALK);
+  for (const auto &node_id : node_list) {
+    request.add_id(static_cast<google::protobuf::int32>(node_id));
+  }
+  for (const auto &type : meta_path) {
+    request.add_type(static_cast<google::protobuf::int32>(type));
+  }
+  auto walk_param = request.mutable_random_walk();
+  walk_param->set_p(step_home_param);
+  walk_param->set_q(step_away_param);
+  walk_param->set_default_id(static_cast<google::protobuf::int32>(default_node));
+  RETURN_IF_NOT_OK(GetGraphDataTensor(request, &response, out));
+#endif
+  return Status::OK();
+}
+
+Status GraphDataClient::GetNodeFeature(const std::shared_ptr<Tensor> &nodes,
+                                       const std::vector<FeatureType> &feature_types, TensorRow *out) {
+#if !defined(_WIN32) && !defined(_WIN64)
+  if (!nodes || nodes->Size() == 0) {
+    RETURN_STATUS_UNEXPECTED("Input nodes is empty");
+  }
+  CHECK_FAIL_RETURN_UNEXPECTED(!feature_types.empty(), "Input feature_types is empty");
+
+  GnnGraphDataRequestPb request;
+  GnnGraphDataResponsePb response;
+  request.set_op_name(GET_NODE_FEATURE);
+  for (const auto &type : feature_types) {
+    request.add_type(static_cast<google::protobuf::int32>(type));
+  }
+  RETURN_IF_NOT_OK(TensorToPb(nodes, request.mutable_id_tensor()));
+  RETURN_IF_NOT_OK(GetGraphData(request, &response));
+  CHECK_FAIL_RETURN_UNEXPECTED(feature_types.size() == response.result_data().size(),
+                               "The number of feature types returned by the server is wrong");
+  if (response.result_data().size() > 0) {
+    size_t i = 0;
+    for (const auto &result : response.result_data()) {
+      std::shared_ptr<Tensor> tensor;
+      RETURN_IF_NOT_OK(PbToTensor(&result, &tensor));
+      std::shared_ptr<Tensor> fea_tensor;
+      RETURN_IF_NOT_OK(ParseNodeFeatureFromMemory(nodes, feature_types[i], tensor, &fea_tensor));
+      out->emplace_back(std::move(fea_tensor));
+      ++i;
+    }
+  } else {
+    RETURN_STATUS_UNEXPECTED("RPC failed: The number of returned tensor is abnormal");
+  }
+#endif
+  return Status::OK();
+}
+
+Status GraphDataClient::GetEdgeFeature(const std::shared_ptr<Tensor> &edges,
+                                       const std::vector<FeatureType> &feature_types, TensorRow *out) {
+#if !defined(_WIN32) && !defined(_WIN64)
+  if (!edges || edges->Size() == 0) {
+    RETURN_STATUS_UNEXPECTED("Input edges is empty");
+  }
+  CHECK_FAIL_RETURN_UNEXPECTED(!feature_types.empty(), "Input feature_types is empty");
+
+  GnnGraphDataRequestPb request;
+  GnnGraphDataResponsePb response;
+  request.set_op_name(GET_EDGE_FEATURE);
+  for (const auto &type : feature_types) {
+    request.add_type(static_cast<google::protobuf::int32>(type));
+  }
+  RETURN_IF_NOT_OK(TensorToPb(edges, request.mutable_id_tensor()));
+  RETURN_IF_NOT_OK(GetGraphData(request, &response));
+  CHECK_FAIL_RETURN_UNEXPECTED(feature_types.size() == response.result_data().size(),
+                               "The number of feature types returned by the server is wrong");
+  if (response.result_data().size() > 0) {
+    size_t i = 0;
+    for (const auto &result : response.result_data()) {
+      std::shared_ptr<Tensor> tensor;
+      RETURN_IF_NOT_OK(PbToTensor(&result, &tensor));
+      std::shared_ptr<Tensor> fea_tensor;
+      RETURN_IF_NOT_OK(ParseEdgeFeatureFromMemory(edges, feature_types[i], tensor, &fea_tensor));
+      out->emplace_back(std::move(fea_tensor));
+      ++i;
+    }
+  } else {
+    RETURN_STATUS_UNEXPECTED("RPC failed: The number of returned tensor is abnormal");
+  }
+#endif
+  return Status::OK();
+}
+
+Status GraphDataClient::GraphInfo(py::dict *out) {
+#if !defined(_WIN32) && !defined(_WIN64)
+  RETURN_IF_NOT_OK(CheckPid());
+  void *tag;
+  bool ok;
+  grpc::Status status;
+  grpc::ClientContext ctx;
+  grpc::CompletionQueue cq;
+  GnnMetaInfoRequestPb request;
+  GnnMetaInfoResponsePb response;
+  // One minute timeout
+  auto deadline = std::chrono::system_clock::now() + std::chrono::seconds(60);
+  ctx.set_deadline(deadline);
+  std::unique_ptr<grpc::ClientAsyncResponseReader<GnnMetaInfoResponsePb>> rpc(
+    stub_->PrepareAsyncGetMetaInfo(&ctx, request, &cq));
+  rpc->StartCall();
+  rpc->Finish(&response, &status, &response);
+
+  {
+    py::gil_scoped_release gil_release;
+    auto success = cq.Next(&tag, &ok);
+    CHECK_FAIL_RETURN_UNEXPECTED(success, "Expect successful");
+    CHECK_FAIL_RETURN_UNEXPECTED(tag == &response, "Expect the same tag");
+    CHECK_FAIL_RETURN_UNEXPECTED(ok, "Expect successful");
+  }
+
+  if (status.ok()) {
+    if (response.error_msg() != "Success") {
+      RETURN_STATUS_UNEXPECTED(response.error_msg());
+    } else {
+      MetaInfo meta_info;
+      for (const auto &node : response.node_info()) {
+        meta_info.node_type.emplace_back(static_cast<NodeType>(node.type()));
+        meta_info.node_num[static_cast<NodeType>(node.type())] = static_cast<NodeIdType>(node.num());
+      }
+      for (const auto &edge : response.edge_info()) {
+        meta_info.edge_type.emplace_back(static_cast<EdgeType>(edge.type()));
+        meta_info.edge_num[static_cast<EdgeType>(edge.type())] = static_cast<EdgeIdType>(edge.num());
+      }
+      for (const auto &feature_type : response.node_feature_type()) {
+        meta_info.node_feature_type.emplace_back(static_cast<FeatureType>(feature_type));
+      }
+      for (const auto &feature_type : response.edge_feature_type()) {
+        meta_info.edge_feature_type.emplace_back(static_cast<FeatureType>(feature_type));
+      }
+      (*out)["node_type"] = py::cast(meta_info.node_type);
+      (*out)["edge_type"] = py::cast(meta_info.edge_type);
+      (*out)["node_num"] = py::cast(meta_info.node_num);
+      (*out)["edge_num"] = py::cast(meta_info.edge_num);
+      (*out)["node_feature_type"] = py::cast(meta_info.node_feature_type);
+      (*out)["edge_feature_type"] = py::cast(meta_info.edge_feature_type);
+    }
+  } else {
+    auto error_code = status.error_code();
+    RETURN_STATUS_UNEXPECTED(status.error_message() + ". GRPC Code " + std::to_string(error_code));
+  }
+#endif
+  return Status::OK();
+}
+
+#if !defined(_WIN32) && !defined(_WIN64)
+Status GraphDataClient::GetGraphData(const GnnGraphDataRequestPb &request, GnnGraphDataResponsePb *response) {
+  RETURN_IF_NOT_OK(CheckPid());
+  void *tag;
+  bool ok;
+  grpc::Status status;
+  grpc::ClientContext ctx;
+  grpc::CompletionQueue cq;
+  // One minute timeout
+  auto deadline = std::chrono::system_clock::now() + std::chrono::seconds(60);
+  ctx.set_deadline(deadline);
+  std::unique_ptr<grpc::ClientAsyncResponseReader<GnnGraphDataResponsePb>> rpc(
+    stub_->PrepareAsyncGetGraphData(&ctx, request, &cq));
+  rpc->StartCall();
+  rpc->Finish(response, &status, response);
+
+  {
+    py::gil_scoped_release gil_release;
+    auto success = cq.Next(&tag, &ok);
+    CHECK_FAIL_RETURN_UNEXPECTED(success, "Expect successful");
+    CHECK_FAIL_RETURN_UNEXPECTED(tag == response, "Expect the same tag");
+    CHECK_FAIL_RETURN_UNEXPECTED(ok, "Expect successful");
+  }
+
+  if (status.ok()) {
+    if (response->error_msg() != "Success") {
+      RETURN_STATUS_UNEXPECTED(response->error_msg());
+    }
+  } else {
+    auto error_code = status.error_code();
+    RETURN_STATUS_UNEXPECTED(status.error_message() + ". GRPC Code " + std::to_string(error_code));
+  }
+
+  return Status::OK();
+}
+
+Status GraphDataClient::GetGraphDataTensor(const GnnGraphDataRequestPb &request, GnnGraphDataResponsePb *response,
+                                           std::shared_ptr<Tensor> *out) {
+  RETURN_IF_NOT_OK(GetGraphData(request, response));
+  if (1 == response->result_data().size()) {
+    const TensorPb &result = response->result_data()[0];
+    std::shared_ptr<Tensor> tensor;
+    RETURN_IF_NOT_OK(PbToTensor(&result, &tensor));
+    *out = std::move(tensor);
+  } else {
+    RETURN_STATUS_UNEXPECTED("RPC failed: The number of returned tensor is abnormal");
+  }
+  return Status::OK();
+}
+
+Status GraphDataClient::ParseNodeFeatureFromMemory(const std::shared_ptr<Tensor> &nodes, FeatureType feature_type,
+                                                   const std::shared_ptr<Tensor> &memory_tensor,
+                                                   std::shared_ptr<Tensor> *out) {
+  std::shared_ptr<Tensor> default_feature;
+  // If no feature can be obtained, fill in the default value
+  RETURN_IF_NOT_OK(GetNodeDefaultFeature(feature_type, &default_feature));
+  TensorShape shape(default_feature->shape());
+  auto shape_vec = nodes->shape().AsVector();
+  dsize_t size = std::accumulate(shape_vec.begin(), shape_vec.end(), 1, std::multiplies<dsize_t>());
+  shape = shape.PrependDim(size);
+  std::shared_ptr<Tensor> fea_tensor;
+  RETURN_IF_NOT_OK(Tensor::CreateEmpty(shape, default_feature->type(), &fea_tensor));
+
+  dsize_t index = 0;
+  auto fea_addr_itr = memory_tensor->begin<int64_t>();
+  for (auto node_itr = nodes->begin<NodeIdType>(); node_itr != nodes->end<NodeIdType>(); ++node_itr) {
+    int64_t offset = *fea_addr_itr;
+    fea_addr_itr++;
+    int64_t len = *fea_addr_itr;
+    fea_addr_itr++;
+    if (*node_itr == kDefaultNodeId || offset < 0 || len <= 0) {
+      RETURN_IF_NOT_OK(fea_tensor->InsertTensor({index}, default_feature));
+    } else {
+      uchar *start_addr_of_index = nullptr;
+      TensorShape remaining({-1});
+      RETURN_IF_NOT_OK(fea_tensor->StartAddrOfIndex({index}, &start_addr_of_index, &remaining));
+      RETURN_IF_NOT_OK(graph_shared_memory_->GetData(start_addr_of_index, len, offset, len));
+    }
+    index++;
+  }
+
+  TensorShape reshape(nodes->shape());
+  for (auto s : default_feature->shape().AsVector()) {
+    reshape = reshape.AppendDim(s);
+  }
+  RETURN_IF_NOT_OK(fea_tensor->Reshape(reshape));
+  fea_tensor->Squeeze();
+
+  *out = std::move(fea_tensor);
+  return Status::OK();
+}
+
+Status GraphDataClient::ParseEdgeFeatureFromMemory(const std::shared_ptr<Tensor> &edges, FeatureType feature_type,
+                                                   const std::shared_ptr<Tensor> &memory_tensor,
+                                                   std::shared_ptr<Tensor> *out) {
+  std::shared_ptr<Tensor> default_feature;
+  // If no feature can be obtained, fill in the default value
+  RETURN_IF_NOT_OK(GetEdgeDefaultFeature(feature_type, &default_feature));
+  TensorShape shape(default_feature->shape());
+  auto shape_vec = edges->shape().AsVector();
+  dsize_t size = std::accumulate(shape_vec.begin(), shape_vec.end(), 1, std::multiplies<dsize_t>());
+  shape = shape.PrependDim(size);
+  std::shared_ptr<Tensor> fea_tensor;
+  RETURN_IF_NOT_OK(Tensor::CreateEmpty(shape, default_feature->type(), &fea_tensor));
+
+  dsize_t index = 0;
+  auto fea_addr_itr = memory_tensor->begin<int64_t>();
+  for (auto edge_itr = edges->begin<EdgeIdType>(); edge_itr != edges->end<EdgeIdType>(); ++edge_itr) {
+    int64_t offset = *fea_addr_itr;
+    fea_addr_itr++;
+    int64_t len = *fea_addr_itr;
+    fea_addr_itr++;
+    if (offset < 0 || len <= 0) {
+      RETURN_IF_NOT_OK(fea_tensor->InsertTensor({index}, default_feature));
+    } else {
+      uchar *start_addr_of_index = nullptr;
+      TensorShape remaining({-1});
+      RETURN_IF_NOT_OK(fea_tensor->StartAddrOfIndex({index}, &start_addr_of_index, &remaining));
+      RETURN_IF_NOT_OK(graph_shared_memory_->GetData(start_addr_of_index, len, offset, len));
+    }
+    index++;
+  }
+
+  TensorShape reshape(edges->shape());
+  for (auto s : default_feature->shape().AsVector()) {
+    reshape = reshape.AppendDim(s);
+  }
+  RETURN_IF_NOT_OK(fea_tensor->Reshape(reshape));
+  fea_tensor->Squeeze();
+
+  *out = std::move(fea_tensor);
+  return Status::OK();
+}
+
+Status GraphDataClient::GetNodeDefaultFeature(FeatureType feature_type, std::shared_ptr<Tensor> *out_feature) {
+  auto itr = default_node_feature_map_.find(feature_type);
+  if (itr == default_node_feature_map_.end()) {
+    std::string err_msg = "Invalid feature type:" + std::to_string(feature_type);
+    RETURN_STATUS_UNEXPECTED(err_msg);
+  } else {
+    *out_feature = itr->second;
+  }
+  return Status::OK();
+}
+
+Status GraphDataClient::GetEdgeDefaultFeature(FeatureType feature_type, std::shared_ptr<Tensor> *out_feature) {
+  auto itr = default_edge_feature_map_.find(feature_type);
+  if (itr == default_edge_feature_map_.end()) {
+    std::string err_msg = "Invalid feature type:" + std::to_string(feature_type);
+    RETURN_STATUS_UNEXPECTED(err_msg);
+  } else {
+    *out_feature = itr->second;
+  }
+  return Status::OK();
+}
+
+Status GraphDataClient::RegisterToServer() {
+  RETURN_IF_NOT_OK(CheckPid());
+  void *tag;
+  bool ok;
+  grpc::Status status;
+  grpc::ClientContext ctx;
+  grpc::CompletionQueue cq;
+  GnnClientRegisterRequestPb request;
+  GnnClientRegisterResponsePb response;
+  request.set_pid(static_cast<google::protobuf::int32>(pid_));
+  // One minute timeout
+  auto deadline = std::chrono::system_clock::now() + std::chrono::seconds(60);
+  ctx.set_deadline(deadline);
+  std::unique_ptr<grpc::ClientAsyncResponseReader<GnnClientRegisterResponsePb>> rpc(
+    stub_->PrepareAsyncClientRegister(&ctx, request, &cq));
+  rpc->StartCall();
+  rpc->Finish(&response, &status, &response);
+
+  {
+    py::gil_scoped_release gil_release;
+    auto success = cq.Next(&tag, &ok);
+    CHECK_FAIL_RETURN_UNEXPECTED(success, "Expect successful");
+    CHECK_FAIL_RETURN_UNEXPECTED(tag == &response, "Expect the same tag");
+    CHECK_FAIL_RETURN_UNEXPECTED(ok, "Expect successful");
+  }
+
+  if (status.ok()) {
+    if (response.error_msg() == "Success") {
+      registered_ = true;
+      data_schema_ = mindrecord::json::parse(response.data_schema());
+      shared_memory_key_ = static_cast<key_t>(response.shared_memory_key());
+      shared_memory_size_ = response.shared_memory_size();
+      MS_LOG(INFO) << "Register success, recv data_schema:" << response.data_schema();
+      for (auto feature_info : response.default_node_feature()) {
+        std::shared_ptr<Tensor> tensor;
+        RETURN_IF_NOT_OK(PbToTensor(&feature_info.feature(), &tensor));
+        default_node_feature_map_[feature_info.type()] = tensor;
+      }
+      for (auto feature_info : response.default_edge_feature()) {
+        std::shared_ptr<Tensor> tensor;
+        RETURN_IF_NOT_OK(PbToTensor(&feature_info.feature(), &tensor));
+        default_edge_feature_map_[feature_info.type()] = tensor;
+      }
+    } else {
+      RETURN_STATUS_UNEXPECTED(response.error_msg());
+    }
+  } else {
+    auto error_code = status.error_code();
+    RETURN_STATUS_UNEXPECTED(status.error_message() + ". GRPC Code " + std::to_string(error_code));
+  }
+  return Status::OK();
+}
+
+Status GraphDataClient::UnRegisterToServer() {
+  RETURN_IF_NOT_OK(CheckPid());
+  MS_LOG(INFO) << "Graph data client send unregistered to server ";
+  void *tag;
+  bool ok;
+  grpc::Status status;
+  grpc::ClientContext ctx;
+  grpc::CompletionQueue cq;
+  GnnClientUnRegisterRequestPb request;
+  GnnClientUnRegisterResponsePb response;
+  request.set_pid(static_cast<google::protobuf::int32>(pid_));
+  // One minute timeout
+  auto deadline = std::chrono::system_clock::now() + std::chrono::seconds(60);
+  ctx.set_deadline(deadline);
+  std::unique_ptr<grpc::ClientAsyncResponseReader<GnnClientUnRegisterResponsePb>> rpc(
+    stub_->PrepareAsyncClientUnRegister(&ctx, request, &cq));
+  rpc->StartCall();
+  rpc->Finish(&response, &status, &response);
+  {
+    py::gil_scoped_release gil_release;
+    auto success = cq.Next(&tag, &ok);
+    CHECK_FAIL_RETURN_UNEXPECTED(success, "Expect successful");
+    CHECK_FAIL_RETURN_UNEXPECTED(tag == &response, "Expect the same tag");
+    CHECK_FAIL_RETURN_UNEXPECTED(ok, "Expect successful");
+  }
+  if (status.ok()) {
+    if (response.error_msg() == "Success") {
+      MS_LOG(INFO) << "Unregister success.";
+      registered_ = false;
+    } else {
+      RETURN_STATUS_UNEXPECTED(response.error_msg());
+    }
+  } else {
+    auto error_code = status.error_code();
+    RETURN_STATUS_UNEXPECTED(status.error_message() + ". GRPC Code " + std::to_string(error_code));
+  }
+  return Status::OK();
+}
+
+Status GraphDataClient::InitFeatureParser() {
+  // get shared memory
+  graph_shared_memory_ = std::make_unique<GraphSharedMemory>(shared_memory_size_, shared_memory_key_);
+  RETURN_IF_NOT_OK(graph_shared_memory_->GetSharedMemory());
+  // build feature parser
+  graph_feature_parser_ = std::make_unique<GraphFeatureParser>(ShardColumn(data_schema_));
+
+  return Status::OK();
+}
+#endif
+
+}  // namespace gnn
+}  // namespace dataset
+}  // namespace mindspore

mindspore/ccsrc/minddata/dataset/engine/gnn/graph_data_client.h

@@ -0,0 +1,185 @@
+/**
+ * Copyright 2020 Huawei Technologies Co., Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#ifndef MINDSPORE_CCSRC_MINDDATA_DATASET_ENGINE_GNN_GRAPH_DATA_CLIENT_H_
+#define MINDSPORE_CCSRC_MINDDATA_DATASET_ENGINE_GNN_GRAPH_DATA_CLIENT_H_
+
+#include <algorithm>
+#include <memory>
+#include <string>
+#include <map>
+#include <unordered_map>
+#include <unordered_set>
+#include <vector>
+#include <utility>
+
+#if !defined(_WIN32) && !defined(_WIN64)
+#include "proto/gnn_graph_data.grpc.pb.h"
+#include "proto/gnn_graph_data.pb.h"
+#endif
+#include "minddata/dataset/engine/gnn/graph_data.h"
+#include "minddata/dataset/engine/gnn/graph_feature_parser.h"
+#if !defined(_WIN32) && !defined(_WIN64)
+#include "minddata/dataset/engine/gnn/graph_shared_memory.h"
+#endif
+#include "minddata/mindrecord/include/common/shard_utils.h"
+#include "minddata/mindrecord/include/shard_column.h"
+
+namespace mindspore {
+namespace dataset {
+namespace gnn {
+
+class GraphDataClient : public GraphData {
+ public:
+  // Constructor
+  // @param std::string dataset_file -
+  // @param int32_t num_workers - number of parallel threads
+  GraphDataClient(const std::string &dataset_file, const std::string &hostname, int32_t port);
+
+  ~GraphDataClient();
+
+  Status Init() override;
+
+  Status Stop() override;
+
+  // Get all nodes from the graph.
+  // @param NodeType node_type - type of node
+  // @param std::shared_ptr<Tensor> *out - Returned nodes id
+  // @return Status - The error code return
+  Status GetAllNodes(NodeType node_type, std::shared_ptr<Tensor> *out) override;
+
+  // Get all edges from the graph.
+  // @param NodeType edge_type - type of edge
+  // @param std::shared_ptr<Tensor> *out - Returned edge ids
+  // @return Status - The error code return
+  Status GetAllEdges(EdgeType edge_type, std::shared_ptr<Tensor> *out) override;
+
+  // Get the node id from the edge.
+  // @param std::vector<EdgeIdType> edge_list - List of edges
+  // @param std::shared_ptr<Tensor> *out - Returned node ids
+  // @return Status - The error code return
+  Status GetNodesFromEdges(const std::vector<EdgeIdType> &edge_list, std::shared_ptr<Tensor> *out) override;
+
+  // All neighbors of the acquisition node.
+  // @param std::vector<NodeType> node_list - List of nodes
+  // @param NodeType neighbor_type - The type of neighbor. If the type does not exist, an error will be reported
+  // @param std::shared_ptr<Tensor> *out - Returned neighbor's id. Because the number of neighbors at different nodes is
+  // different, the returned tensor is output according to the maximum number of neighbors. If the number of neighbors
+  // is not enough, fill in tensor as -1.
+  // @return Status - The error code return
+  Status GetAllNeighbors(const std::vector<NodeIdType> &node_list, NodeType neighbor_type,
+                         std::shared_ptr<Tensor> *out) override;
+
+  // Get sampled neighbors.
+  // @param std::vector<NodeType> node_list - List of nodes
+  // @param std::vector<NodeIdType> neighbor_nums - Number of neighbors sampled per hop
+  // @param std::vector<NodeType> neighbor_types - Neighbor type sampled per hop
+  // @param std::shared_ptr<Tensor> *out - Returned neighbor's id.
+  // @return Status - The error code return
+  Status GetSampledNeighbors(const std::vector<NodeIdType> &node_list, const std::vector<NodeIdType> &neighbor_nums,
+                             const std::vector<NodeType> &neighbor_types, std::shared_ptr<Tensor> *out) override;
+
+  // Get negative sampled neighbors.
+  // @param std::vector<NodeType> node_list - List of nodes
+  // @param NodeIdType samples_num - Number of neighbors sampled
+  // @param NodeType neg_neighbor_type - The type of negative neighbor.
+  // @param std::shared_ptr<Tensor> *out - Returned negative neighbor's id.
+  // @return Status - The error code return
+  Status GetNegSampledNeighbors(const std::vector<NodeIdType> &node_list, NodeIdType samples_num,
+                                NodeType neg_neighbor_type, std::shared_ptr<Tensor> *out) override;
+
+  // Node2vec random walk.
+  // @param std::vector<NodeIdType> node_list - List of nodes
+  // @param std::vector<NodeType> meta_path - node type of each step
+  // @param float step_home_param - return hyper parameter in node2vec algorithm
+  // @param float step_away_param - inout hyper parameter in node2vec algorithm
+  // @param NodeIdType default_node - default node id
+  // @param std::shared_ptr<Tensor> *out - Returned nodes id in walk path
+  // @return Status - The error code return
+  Status RandomWalk(const std::vector<NodeIdType> &node_list, const std::vector<NodeType> &meta_path,
+                    float step_home_param, float step_away_param, NodeIdType default_node,
+                    std::shared_ptr<Tensor> *out) override;
+
+  // Get the feature of a node
+  // @param std::shared_ptr<Tensor> nodes - List of nodes
+  // @param std::vector<FeatureType> feature_types - Types of features, An error will be reported if the feature type
+  // does not exist.
+  // @param TensorRow *out - Returned features
+  // @return Status - The error code return
+  Status GetNodeFeature(const std::shared_ptr<Tensor> &nodes, const std::vector<FeatureType> &feature_types,
+                        TensorRow *out) override;
+
+  // Get the feature of a edge
+  // @param std::shared_ptr<Tensor> edges - List of edges
+  // @param std::vector<FeatureType> feature_types - Types of features, An error will be reported if the feature type
+  // does not exist.
+  // @param Tensor *out - Returned features
+  // @return Status - The error code return
+  Status GetEdgeFeature(const std::shared_ptr<Tensor> &edges, const std::vector<FeatureType> &feature_types,
+                        TensorRow *out) override;
+
+  // Return meta information to python layer
+  Status GraphInfo(py::dict *out) override;
+
+ private:
+#if !defined(_WIN32) && !defined(_WIN64)
+  Status ParseNodeFeatureFromMemory(const std::shared_ptr<Tensor> &nodes, FeatureType feature_type,
+                                    const std::shared_ptr<Tensor> &memory_tensor, std::shared_ptr<Tensor> *out);
+
+  Status ParseEdgeFeatureFromMemory(const std::shared_ptr<Tensor> &edges, FeatureType feature_type,
+                                    const std::shared_ptr<Tensor> &memory_tensor, std::shared_ptr<Tensor> *out);
+
+  Status GetNodeDefaultFeature(FeatureType feature_type, std::shared_ptr<Tensor> *out_feature);
+
+  Status GetEdgeDefaultFeature(FeatureType feature_type, std::shared_ptr<Tensor> *out_feature);
+
+  Status GetGraphData(const GnnGraphDataRequestPb &request, GnnGraphDataResponsePb *response);
+
+  Status GetGraphDataTensor(const GnnGraphDataRequestPb &request, GnnGraphDataResponsePb *response,
+                            std::shared_ptr<Tensor> *out);
+
+  Status RegisterToServer();
+
+  Status UnRegisterToServer();
+
+  Status InitFeatureParser();
+
+  Status CheckPid() {
+    CHECK_FAIL_RETURN_UNEXPECTED(pid_ == getpid(),
+                                 "Multi-process mode is not supported, please change to use multi-thread");
+    return Status::OK();
+  }
+#endif
+
+  std::string dataset_file_;
+  std::string host_;
+  int32_t port_;
+  int32_t pid_;
+  mindrecord::json data_schema_;
+#if !defined(_WIN32) && !defined(_WIN64)
+  std::unique_ptr<GnnGraphData::Stub> stub_;
+  key_t shared_memory_key_;
+  int64_t shared_memory_size_;
+  std::unique_ptr<GraphFeatureParser> graph_feature_parser_;
+  std::unique_ptr<GraphSharedMemory> graph_shared_memory_;
+  std::unordered_map<FeatureType, std::shared_ptr<Tensor>> default_node_feature_map_;
+  std::unordered_map<FeatureType, std::shared_ptr<Tensor>> default_edge_feature_map_;
+#endif
+  bool registered_;
+};
+}  // namespace gnn
+}  // namespace dataset
+}  // namespace mindspore
+#endif  // MINDSPORE_CCSRC_MINDDATA_DATASET_ENGINE_GNN_GRAPH_DATA_CLIENT_H_

mindspore/ccsrc/minddata/dataset/engine/gnn/graph_data_impl.cc

@@ -13,7 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-#include "minddata/dataset/engine/gnn/graph.h"
+#include "minddata/dataset/engine/gnn/graph_data_impl.h"
 
 #include <algorithm>
 #include <functional>
@@ -22,19 +22,25 @@
 #include <utility>
 
 #include "minddata/dataset/core/tensor_shape.h"
+#include "minddata/dataset/engine/gnn/graph_loader.h"
 #include "minddata/dataset/util/random.h"
-
 namespace mindspore {
 namespace dataset {
 namespace gnn {
 
-Graph::Graph(std::string dataset_file, int32_t num_workers)
+GraphDataImpl::GraphDataImpl(std::string dataset_file, int32_t num_workers, bool server_mode)
-    : dataset_file_(dataset_file), num_workers_(num_workers), rnd_(GetRandomDevice()), random_walk_(this) {
+    : dataset_file_(dataset_file),
+      num_workers_(num_workers),
+      rnd_(GetRandomDevice()),
+      random_walk_(this),
+      server_mode_(server_mode) {
   rnd_.seed(GetSeed());
   MS_LOG(INFO) << "num_workers:" << num_workers;
 }
 
-Status Graph::GetAllNodes(NodeType node_type, std::shared_ptr<Tensor> *out) {
+GraphDataImpl::~GraphDataImpl() {}
+
+Status GraphDataImpl::GetAllNodes(NodeType node_type, std::shared_ptr<Tensor> *out) {
   auto itr = node_type_map_.find(node_type);
   if (itr == node_type_map_.end()) {
     std::string err_msg = "Invalid node type:" + std::to_string(node_type);
@@ -46,8 +52,8 @@ Status Graph::GetAllNodes(NodeType node_type, std::shared_ptr<Tensor> *out) {
 }
 
 template <typename T>
-Status Graph::CreateTensorByVector(const std::vector<std::vector<T>> &data, DataType type,
+Status GraphDataImpl::CreateTensorByVector(const std::vector<std::vector<T>> &data, DataType type,
-                                   std::shared_ptr<Tensor> *out) {
+                                           std::shared_ptr<Tensor> *out) {
   if (!type.IsCompatible<T>()) {
     RETURN_STATUS_UNEXPECTED("Data type not compatible");
   }
@@ -72,7 +78,7 @@ Status Graph::CreateTensorByVector(const std::vector<std::vector<T>> &data, Data
 }
 
 template <typename T>
-Status Graph::ComplementVector(std::vector<std::vector<T>> *data, size_t max_size, T default_value) {
+Status GraphDataImpl::ComplementVector(std::vector<std::vector<T>> *data, size_t max_size, T default_value) {
   if (!data || data->empty()) {
     RETURN_STATUS_UNEXPECTED("Input data is empty");
   }
@@ -89,7 +95,7 @@ Status Graph::ComplementVector(std::vector<std::vector<T>> *data, size_t max_siz
   return Status::OK();
 }
 
-Status Graph::GetAllEdges(EdgeType edge_type, std::shared_ptr<Tensor> *out) {
+Status GraphDataImpl::GetAllEdges(EdgeType edge_type, std::shared_ptr<Tensor> *out) {
   auto itr = edge_type_map_.find(edge_type);
   if (itr == edge_type_map_.end()) {
     std::string err_msg = "Invalid edge type:" + std::to_string(edge_type);
@@ -100,7 +106,7 @@ Status Graph::GetAllEdges(EdgeType edge_type, std::shared_ptr<Tensor> *out) {
   return Status::OK();
 }
 
-Status Graph::GetNodesFromEdges(const std::vector<EdgeIdType> &edge_list, std::shared_ptr<Tensor> *out) {
+Status GraphDataImpl::GetNodesFromEdges(const std::vector<EdgeIdType> &edge_list, std::shared_ptr<Tensor> *out) {
   if (edge_list.empty()) {
     RETURN_STATUS_UNEXPECTED("Input edge_list is empty");
   }
@@ -122,8 +128,8 @@ Status Graph::GetNodesFromEdges(const std::vector<EdgeIdType> &edge_list, std::s
   return Status::OK();
 }
 
-Status Graph::GetAllNeighbors(const std::vector<NodeIdType> &node_list, NodeType neighbor_type,
+Status GraphDataImpl::GetAllNeighbors(const std::vector<NodeIdType> &node_list, NodeType neighbor_type,
-                              std::shared_ptr<Tensor> *out) {
+                                      std::shared_ptr<Tensor> *out) {
   CHECK_FAIL_RETURN_UNEXPECTED(!node_list.empty(), "Input node_list is empty.");
   RETURN_IF_NOT_OK(CheckNeighborType(neighbor_type));
 
@@ -143,7 +149,7 @@ Status Graph::GetAllNeighbors(const std::vector<NodeIdType> &node_list, NodeType
   return Status::OK();
 }
 
-Status Graph::CheckSamplesNum(NodeIdType samples_num) {
+Status GraphDataImpl::CheckSamplesNum(NodeIdType samples_num) {
   NodeIdType all_nodes_number =
     std::accumulate(node_type_map_.begin(), node_type_map_.end(), 0,
                     [](NodeIdType t1, const auto &t2) -> NodeIdType { return t1 + t2.second.size(); });
@@ -155,7 +161,7 @@ Status Graph::CheckSamplesNum(NodeIdType samples_num) {
   return Status::OK();
 }
 
-Status Graph::CheckNeighborType(NodeType neighbor_type) {
+Status GraphDataImpl::CheckNeighborType(NodeType neighbor_type) {
   if (node_type_map_.find(neighbor_type) == node_type_map_.end()) {
     std::string err_msg = "Invalid neighbor type:" + std::to_string(neighbor_type);
     RETURN_STATUS_UNEXPECTED(err_msg);
@@ -163,9 +169,9 @@ Status Graph::CheckNeighborType(NodeType neighbor_type) {
   return Status::OK();
 }
 
-Status Graph::GetSampledNeighbors(const std::vector<NodeIdType> &node_list,
+Status GraphDataImpl::GetSampledNeighbors(const std::vector<NodeIdType> &node_list,
-                                  const std::vector<NodeIdType> &neighbor_nums,
+                                          const std::vector<NodeIdType> &neighbor_nums,
-                                  const std::vector<NodeType> &neighbor_types, std::shared_ptr<Tensor> *out) {
+                                          const std::vector<NodeType> &neighbor_types, std::shared_ptr<Tensor> *out) {
   CHECK_FAIL_RETURN_UNEXPECTED(!node_list.empty(), "Input node_list is empty.");
   CHECK_FAIL_RETURN_UNEXPECTED(neighbor_nums.size() == neighbor_types.size(),
                                "The sizes of neighbor_nums and neighbor_types are inconsistent.");
@@ -205,8 +211,9 @@ Status Graph::GetSampledNeighbors(const std::vector<NodeIdType> &node_list,
   return Status::OK();
 }
 
-Status Graph::NegativeSample(const std::vector<NodeIdType> &data, const std::unordered_set<NodeIdType> &exclude_data,
+Status GraphDataImpl::NegativeSample(const std::vector<NodeIdType> &data,
-                             int32_t samples_num, std::vector<NodeIdType> *out_samples) {
+                                     const std::unordered_set<NodeIdType> &exclude_data, int32_t samples_num,
+                                     std::vector<NodeIdType> *out_samples) {
   CHECK_FAIL_RETURN_UNEXPECTED(!data.empty(), "Input data is empty.");
   std::vector<NodeIdType> shuffled_id(data.size());
   std::iota(shuffled_id.begin(), shuffled_id.end(), 0);
@@ -223,8 +230,8 @@ Status Graph::NegativeSample(const std::vector<NodeIdType> &data, const std::uno
   return Status::OK();
 }
 
-Status Graph::GetNegSampledNeighbors(const std::vector<NodeIdType> &node_list, NodeIdType samples_num,
+Status GraphDataImpl::GetNegSampledNeighbors(const std::vector<NodeIdType> &node_list, NodeIdType samples_num,
-                                     NodeType neg_neighbor_type, std::shared_ptr<Tensor> *out) {
+                                             NodeType neg_neighbor_type, std::shared_ptr<Tensor> *out) {
   CHECK_FAIL_RETURN_UNEXPECTED(!node_list.empty(), "Input node_list is empty.");
   RETURN_IF_NOT_OK(CheckSamplesNum(samples_num));
   RETURN_IF_NOT_OK(CheckNeighborType(neg_neighbor_type));
@@ -260,9 +267,9 @@ Status Graph::GetNegSampledNeighbors(const std::vector<NodeIdType> &node_list, N
   return Status::OK();
 }
 
-Status Graph::RandomWalk(const std::vector<NodeIdType> &node_list, const std::vector<NodeType> &meta_path,
+Status GraphDataImpl::RandomWalk(const std::vector<NodeIdType> &node_list, const std::vector<NodeType> &meta_path,
-                         float step_home_param, float step_away_param, NodeIdType default_node,
+                                 float step_home_param, float step_away_param, NodeIdType default_node,
-                         std::shared_ptr<Tensor> *out) {
+                                 std::shared_ptr<Tensor> *out) {
   RETURN_IF_NOT_OK(random_walk_.Build(node_list, meta_path, step_home_param, step_away_param, default_node));
   std::vector<std::vector<NodeIdType>> walks;
   RETURN_IF_NOT_OK(random_walk_.SimulateWalk(&walks));
@@ -270,7 +277,7 @@ Status Graph::RandomWalk(const std::vector<NodeIdType> &node_list, const std::ve
   return Status::OK();
 }
 
-Status Graph::GetNodeDefaultFeature(FeatureType feature_type, std::shared_ptr<Feature> *out_feature) {
+Status GraphDataImpl::GetNodeDefaultFeature(FeatureType feature_type, std::shared_ptr<Feature> *out_feature) {
   auto itr = default_node_feature_map_.find(feature_type);
   if (itr == default_node_feature_map_.end()) {
     std::string err_msg = "Invalid feature type:" + std::to_string(feature_type);
@@ -281,7 +288,7 @@ Status Graph::GetNodeDefaultFeature(FeatureType feature_type, std::shared_ptr<Fe
   return Status::OK();
 }
 
-Status Graph::GetEdgeDefaultFeature(FeatureType feature_type, std::shared_ptr<Feature> *out_feature) {
+Status GraphDataImpl::GetEdgeDefaultFeature(FeatureType feature_type, std::shared_ptr<Feature> *out_feature) {
   auto itr = default_edge_feature_map_.find(feature_type);
   if (itr == default_edge_feature_map_.end()) {
     std::string err_msg = "Invalid feature type:" + std::to_string(feature_type);
@@ -292,8 +299,8 @@ Status Graph::GetEdgeDefaultFeature(FeatureType feature_type, std::shared_ptr<Fe
   return Status::OK();
 }
 
-Status Graph::GetNodeFeature(const std::shared_ptr<Tensor> &nodes, const std::vector<FeatureType> &feature_types,
+Status GraphDataImpl::GetNodeFeature(const std::shared_ptr<Tensor> &nodes,
-                             TensorRow *out) {
+                                     const std::vector<FeatureType> &feature_types, TensorRow *out) {
   if (!nodes || nodes->Size() == 0) {
     RETURN_STATUS_UNEXPECTED("Input nodes is empty");
   }
@@ -339,8 +346,49 @@ Status Graph::GetNodeFeature(const std::shared_ptr<Tensor> &nodes, const std::ve
   return Status::OK();
 }
 
-Status Graph::GetEdgeFeature(const std::shared_ptr<Tensor> &edges, const std::vector<FeatureType> &feature_types,
+Status GraphDataImpl::GetNodeFeatureSharedMemory(const std::shared_ptr<Tensor> &nodes, FeatureType type,
-                             TensorRow *out) {
+                                                 std::shared_ptr<Tensor> *out) {
+  if (!nodes || nodes->Size() == 0) {
+    RETURN_STATUS_UNEXPECTED("Input nodes is empty");
+  }
+  TensorShape shape = nodes->shape().AppendDim(2);
+  std::shared_ptr<Tensor> fea_tensor;
+  RETURN_IF_NOT_OK(Tensor::CreateEmpty(shape, DataType(DataType::DE_INT64), &fea_tensor));
+
+  auto out_fea_itr = fea_tensor->begin<int64_t>();
+  for (auto node_itr = nodes->begin<NodeIdType>(); node_itr != nodes->end<NodeIdType>(); ++node_itr) {
+    if (*node_itr == kDefaultNodeId) {
+      *out_fea_itr = -1;
+      ++out_fea_itr;
+      *out_fea_itr = -1;
+      ++out_fea_itr;
+    } else {
+      std::shared_ptr<Node> node;
+      RETURN_IF_NOT_OK(GetNodeByNodeId(*node_itr, &node));
+      std::shared_ptr<Feature> feature;
+      if (!node->GetFeatures(type, &feature).IsOk()) {
+        *out_fea_itr = -1;
+        ++out_fea_itr;
+        *out_fea_itr = -1;
+        ++out_fea_itr;
+      } else {
+        for (auto fea_itr = feature->Value()->begin<int64_t>(); fea_itr != feature->Value()->end<int64_t>();
+             ++fea_itr) {
+          *out_fea_itr = *fea_itr;
+          ++out_fea_itr;
+        }
+      }
+    }
+  }
+
+  fea_tensor->Squeeze();
+
+  *out = std::move(fea_tensor);
+  return Status::OK();
+}
+
+Status GraphDataImpl::GetEdgeFeature(const std::shared_ptr<Tensor> &edges,
+                                     const std::vector<FeatureType> &feature_types, TensorRow *out) {
   if (!edges || edges->Size() == 0) {
     RETURN_STATUS_UNEXPECTED("Input edges is empty");
   }
@@ -382,12 +430,45 @@ Status Graph::GetEdgeFeature(const std::shared_ptr<Tensor> &edges, const std::ve
   return Status::OK();
 }
 
-Status Graph::Init() {
+Status GraphDataImpl::GetEdgeFeatureSharedMemory(const std::shared_ptr<Tensor> &edges, FeatureType type,
+                                                 std::shared_ptr<Tensor> *out) {
+  if (!edges || edges->Size() == 0) {
+    RETURN_STATUS_UNEXPECTED("Input edges is empty");
+  }
+  TensorShape shape = edges->shape().AppendDim(2);
+  std::shared_ptr<Tensor> fea_tensor;
+  RETURN_IF_NOT_OK(Tensor::CreateEmpty(shape, DataType(DataType::DE_INT64), &fea_tensor));
+
+  auto out_fea_itr = fea_tensor->begin<int64_t>();
+  for (auto edge_itr = edges->begin<EdgeIdType>(); edge_itr != edges->end<EdgeIdType>(); ++edge_itr) {
+    std::shared_ptr<Edge> edge;
+    RETURN_IF_NOT_OK(GetEdgeByEdgeId(*edge_itr, &edge));
+    std::shared_ptr<Feature> feature;
+    if (!edge->GetFeatures(type, &feature).IsOk()) {
+      *out_fea_itr = -1;
+      ++out_fea_itr;
+      *out_fea_itr = -1;
+      ++out_fea_itr;
+    } else {
+      for (auto fea_itr = feature->Value()->begin<int64_t>(); fea_itr != feature->Value()->end<int64_t>(); ++fea_itr) {
+        *out_fea_itr = *fea_itr;
+        ++out_fea_itr;
+      }
+    }
+  }
+
+  fea_tensor->Squeeze();
+
+  *out = std::move(fea_tensor);
+  return Status::OK();
+}
+
+Status GraphDataImpl::Init() {
   RETURN_IF_NOT_OK(LoadNodeAndEdge());
   return Status::OK();
 }
 
-Status Graph::GetMetaInfo(MetaInfo *meta_info) {
+Status GraphDataImpl::GetMetaInfo(MetaInfo *meta_info) {
   meta_info->node_type.resize(node_type_map_.size());
   std::transform(node_type_map_.begin(), node_type_map_.end(), meta_info->node_type.begin(),
                  [](auto itr) { return itr.first; });
@@ -427,7 +508,7 @@ Status Graph::GetMetaInfo(MetaInfo *meta_info) {
 }
 
 #ifdef ENABLE_PYTHON
-Status Graph::GraphInfo(py::dict *out) {
+Status GraphDataImpl::GraphInfo(py::dict *out) {
   MetaInfo meta_info;
   RETURN_IF_NOT_OK(GetMetaInfo(&meta_info));
   (*out)["node_type"] = py::cast(meta_info.node_type);
@@ -440,18 +521,16 @@ Status Graph::GraphInfo(py::dict *out) {
 }
 #endif
 
-Status Graph::LoadNodeAndEdge() {
+Status GraphDataImpl::LoadNodeAndEdge() {
-  GraphLoader gl(dataset_file_, num_workers_);
+  GraphLoader gl(this, dataset_file_, num_workers_, server_mode_);
   // ask graph_loader to load everything into memory
   RETURN_IF_NOT_OK(gl.InitAndLoad());
   // get all maps
-  RETURN_IF_NOT_OK(gl.GetNodesAndEdges(&node_id_map_, &edge_id_map_, &node_type_map_, &edge_type_map_,
+  RETURN_IF_NOT_OK(gl.GetNodesAndEdges());
-                                       &node_feature_map_, &edge_feature_map_, &default_node_feature_map_,
-                                       &default_edge_feature_map_));
   return Status::OK();
 }
 
-Status Graph::GetNodeByNodeId(NodeIdType id, std::shared_ptr<Node> *node) {
+Status GraphDataImpl::GetNodeByNodeId(NodeIdType id, std::shared_ptr<Node> *node) {
   auto itr = node_id_map_.find(id);
   if (itr == node_id_map_.end()) {
     std::string err_msg = "Invalid node id:" + std::to_string(id);
@@ -462,7 +541,7 @@ Status Graph::GetNodeByNodeId(NodeIdType id, std::shared_ptr<Node> *node) {
   return Status::OK();
 }
 
-Status Graph::GetEdgeByEdgeId(EdgeIdType id, std::shared_ptr<Edge> *edge) {
+Status GraphDataImpl::GetEdgeByEdgeId(EdgeIdType id, std::shared_ptr<Edge> *edge) {
   auto itr = edge_id_map_.find(id);
   if (itr == edge_id_map_.end()) {
     std::string err_msg = "Invalid edge id:" + std::to_string(id);
@@ -473,12 +552,13 @@ Status Graph::GetEdgeByEdgeId(EdgeIdType id, std::shared_ptr<Edge> *edge) {
   return Status::OK();
 }
 
-Graph::RandomWalkBase::RandomWalkBase(Graph *graph)
+GraphDataImpl::RandomWalkBase::RandomWalkBase(GraphDataImpl *graph)
     : graph_(graph), step_home_param_(1.0), step_away_param_(1.0), default_node_(-1), num_walks_(1), num_workers_(1) {}
 
-Status Graph::RandomWalkBase::Build(const std::vector<NodeIdType> &node_list, const std::vector<NodeType> &meta_path,
+Status GraphDataImpl::RandomWalkBase::Build(const std::vector<NodeIdType> &node_list,
-                                    float step_home_param, float step_away_param, const NodeIdType default_node,
+                                            const std::vector<NodeType> &meta_path, float step_home_param,
-                                    int32_t num_walks, int32_t num_workers) {
+                                            float step_away_param, const NodeIdType default_node, int32_t num_walks,
+                                            int32_t num_workers) {
   CHECK_FAIL_RETURN_UNEXPECTED(!node_list.empty(), "Input node_list is empty.");
   node_list_ = node_list;
   if (meta_path.empty() || meta_path.size() > kMaxNumWalks) {
@@ -516,7 +596,7 @@ Status Graph::RandomWalkBase::Build(const std::vector<NodeIdType> &node_list, co
   return Status::OK();
 }
 
-Status Graph::RandomWalkBase::Node2vecWalk(const NodeIdType &start_node, std::vector<NodeIdType> *walk_path) {
+Status GraphDataImpl::RandomWalkBase::Node2vecWalk(const NodeIdType &start_node, std::vector<NodeIdType> *walk_path) {
   // Simulate a random walk starting from start node.
   auto walk = std::vector<NodeIdType>(1, start_node);  // walk is an vector
   // walk simulate
@@ -556,8 +636,8 @@ Status Graph::RandomWalkBase::Node2vecWalk(const NodeIdType &start_node, std::ve
   return Status::OK();
 }
 
-Status Graph::RandomWalkBase::SimulateWalk(std::vector<std::vector<NodeIdType>> *walks) {
+Status GraphDataImpl::RandomWalkBase::SimulateWalk(std::vector<std::vector<NodeIdType>> *walks) {
-  for (int32_t i = 0; i < num_walks_; i++) {
+  for (int32_t i = 0; i < num_walks_; ++i) {
     for (const auto &node : node_list_) {
       std::vector<NodeIdType> walk;
       RETURN_IF_NOT_OK(Node2vecWalk(node, &walk));
@@ -567,8 +647,8 @@ Status Graph::RandomWalkBase::SimulateWalk(std::vector<std::vector<NodeIdType>>
   return Status::OK();
 }
 
-Status Graph::RandomWalkBase::GetNodeProbability(const NodeIdType &node_id, const NodeType &node_type,
+Status GraphDataImpl::RandomWalkBase::GetNodeProbability(const NodeIdType &node_id, const NodeType &node_type,
-                                                 std::shared_ptr<StochasticIndex> *node_probability) {
+                                                         std::shared_ptr<StochasticIndex> *node_probability) {
   // Generate alias nodes
   std::shared_ptr<Node> node;
   graph_->GetNodeByNodeId(node_id, &node);
@@ -581,8 +661,9 @@ Status Graph::RandomWalkBase::GetNodeProbability(const NodeIdType &node_id, cons
   return Status::OK();
 }
 
-Status Graph::RandomWalkBase::GetEdgeProbability(const NodeIdType &src, const NodeIdType &dst, uint32_t meta_path_index,
+Status GraphDataImpl::RandomWalkBase::GetEdgeProbability(const NodeIdType &src, const NodeIdType &dst,
-                                                 std::shared_ptr<StochasticIndex> *edge_probability) {
+                                                         uint32_t meta_path_index,
+                                                         std::shared_ptr<StochasticIndex> *edge_probability) {
   // Get the alias edge setup lists for a given edge.
   std::shared_ptr<Node> src_node;
   graph_->GetNodeByNodeId(src, &src_node);
@@ -616,7 +697,7 @@ Status Graph::RandomWalkBase::GetEdgeProbability(const NodeIdType &src, const No
   return Status::OK();
 }
 
-StochasticIndex Graph::RandomWalkBase::GenerateProbability(const std::vector<float> &probability) {
+StochasticIndex GraphDataImpl::RandomWalkBase::GenerateProbability(const std::vector<float> &probability) {
   uint32_t K = probability.size();
   std::vector<int32_t> switch_to_large_index(K, 0);
   std::vector<float> weight(K, .0);
@@ -644,7 +725,7 @@ StochasticIndex Graph::RandomWalkBase::GenerateProbability(const std::vector<flo
   return StochasticIndex(switch_to_large_index, weight);
 }
 
-uint32_t Graph::RandomWalkBase::WalkToNextNode(const StochasticIndex &stochastic_index) {
+uint32_t GraphDataImpl::RandomWalkBase::WalkToNextNode(const StochasticIndex &stochastic_index) {
   auto switch_to_large_index = stochastic_index.first;
   auto weight = stochastic_index.second;
   const uint32_t size_of_index = switch_to_large_index.size();
@@ -662,7 +743,7 @@ uint32_t Graph::RandomWalkBase::WalkToNextNode(const StochasticIndex &stochastic
 }
 
 template <typename T>
-std::vector<float> Graph::RandomWalkBase::Normalize(const std::vector<T> &non_normalized_probability) {
+std::vector<float> GraphDataImpl::RandomWalkBase::Normalize(const std::vector<T> &non_normalized_probability) {
   float sum_probability =
     1.0 * std::accumulate(non_normalized_probability.begin(), non_normalized_probability.end(), 0);
   if (sum_probability < kGnnEpsilon) {

mindspore/ccsrc/minddata/dataset/engine/gnn/graph_data_impl.h

@@ -13,8 +13,8 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-#ifndef MINDSPORE_CCSRC_MINDDATA_DATASET_ENGINE_GNN_GRAPH_H_
+#ifndef MINDSPORE_CCSRC_MINDDATA_DATASET_ENGINE_GNN_GRAPH_DATA_IMPL_H_
-#define MINDSPORE_CCSRC_MINDDATA_DATASET_ENGINE_GNN_GRAPH_H_
+#define MINDSPORE_CCSRC_MINDDATA_DATASET_ENGINE_GNN_GRAPH_DATA_IMPL_H_
 
 #include <algorithm>
 #include <memory>
@@ -25,13 +25,11 @@
 #include <vector>
 #include <utility>
 
-#include "minddata/dataset/core/tensor.h"
+#include "minddata/dataset/engine/gnn/graph_data.h"
-#include "minddata/dataset/core/tensor_row.h"
+#if !defined(_WIN32) && !defined(_WIN64)
-#include "minddata/dataset/engine/gnn/graph_loader.h"
+#include "minddata/dataset/engine/gnn/graph_shared_memory.h"
-#include "minddata/dataset/engine/gnn/feature.h"
+#endif
-#include "minddata/dataset/engine/gnn/node.h"
+#include "minddata/mindrecord/include/common/shard_utils.h"
-#include "minddata/dataset/engine/gnn/edge.h"
-#include "minddata/dataset/util/status.h"
 
 namespace mindspore {
 namespace dataset {
@@ -41,41 +39,32 @@ const float kGnnEpsilon = 0.0001;
 const uint32_t kMaxNumWalks = 80;
 using StochasticIndex = std::pair<std::vector<int32_t>, std::vector<float>>;
 
-struct MetaInfo {
+class GraphDataImpl : public GraphData {
-  std::vector<NodeType> node_type;
-  std::vector<EdgeType> edge_type;
-  std::map<NodeType, NodeIdType> node_num;
-  std::map<EdgeType, EdgeIdType> edge_num;
-  std::vector<FeatureType> node_feature_type;
-  std::vector<FeatureType> edge_feature_type;
-};
-
-class Graph {
  public:
   // Constructor
   // @param std::string dataset_file -
   // @param int32_t num_workers - number of parallel threads
-  Graph(std::string dataset_file, int32_t num_workers);
+  GraphDataImpl(std::string dataset_file, int32_t num_workers, bool server_mode = false);
 
-  ~Graph() = default;
+  ~GraphDataImpl();
 
   // Get all nodes from the graph.
   // @param NodeType node_type - type of node
   // @param std::shared_ptr<Tensor> *out - Returned nodes id
   // @return Status - The error code return
-  Status GetAllNodes(NodeType node_type, std::shared_ptr<Tensor> *out);
+  Status GetAllNodes(NodeType node_type, std::shared_ptr<Tensor> *out) override;
 
   // Get all edges from the graph.
   // @param NodeType edge_type - type of edge
   // @param std::shared_ptr<Tensor> *out - Returned edge ids
   // @return Status - The error code return
-  Status GetAllEdges(EdgeType edge_type, std::shared_ptr<Tensor> *out);
+  Status GetAllEdges(EdgeType edge_type, std::shared_ptr<Tensor> *out) override;
 
   // Get the node id from the edge.
   // @param std::vector<EdgeIdType> edge_list - List of edges
   // @param std::shared_ptr<Tensor> *out - Returned node ids
   // @return Status - The error code return
-  Status GetNodesFromEdges(const std::vector<EdgeIdType> &edge_list, std::shared_ptr<Tensor> *out);
+  Status GetNodesFromEdges(const std::vector<EdgeIdType> &edge_list, std::shared_ptr<Tensor> *out) override;
 
   // All neighbors of the acquisition node.
   // @param std::vector<NodeType> node_list - List of nodes
@@ -85,7 +74,7 @@ class Graph {
   // is not enough, fill in tensor as -1.
   // @return Status - The error code return
   Status GetAllNeighbors(const std::vector<NodeIdType> &node_list, NodeType neighbor_type,
-                         std::shared_ptr<Tensor> *out);
+                         std::shared_ptr<Tensor> *out) override;
 
   // Get sampled neighbors.
   // @param std::vector<NodeType> node_list - List of nodes
@@ -94,7 +83,7 @@ class Graph {
   // @param std::shared_ptr<Tensor> *out - Returned neighbor's id.
   // @return Status - The error code return
   Status GetSampledNeighbors(const std::vector<NodeIdType> &node_list, const std::vector<NodeIdType> &neighbor_nums,
-                             const std::vector<NodeType> &neighbor_types, std::shared_ptr<Tensor> *out);
+                             const std::vector<NodeType> &neighbor_types, std::shared_ptr<Tensor> *out) override;
 
   // Get negative sampled neighbors.
   // @param std::vector<NodeType> node_list - List of nodes
@@ -103,7 +92,7 @@ class Graph {
   // @param std::shared_ptr<Tensor> *out - Returned negative neighbor's id.
   // @return Status - The error code return
   Status GetNegSampledNeighbors(const std::vector<NodeIdType> &node_list, NodeIdType samples_num,
-                                NodeType neg_neighbor_type, std::shared_ptr<Tensor> *out);
+                                NodeType neg_neighbor_type, std::shared_ptr<Tensor> *out) override;
 
   // Node2vec random walk.
   // @param std::vector<NodeIdType> node_list - List of nodes
@@ -115,7 +104,7 @@ class Graph {
   // @return Status - The error code return
   Status RandomWalk(const std::vector<NodeIdType> &node_list, const std::vector<NodeType> &meta_path,
                     float step_home_param, float step_away_param, NodeIdType default_node,
-                    std::shared_ptr<Tensor> *out);
+                    std::shared_ptr<Tensor> *out) override;
 
   // Get the feature of a node
   // @param std::shared_ptr<Tensor> nodes - List of nodes
@@ -124,16 +113,22 @@ class Graph {
   // @param TensorRow *out - Returned features
   // @return Status - The error code return
   Status GetNodeFeature(const std::shared_ptr<Tensor> &nodes, const std::vector<FeatureType> &feature_types,
-                        TensorRow *out);
+                        TensorRow *out) override;
+
+  Status GetNodeFeatureSharedMemory(const std::shared_ptr<Tensor> &nodes, FeatureType type,
+                                    std::shared_ptr<Tensor> *out);
 
   // Get the feature of a edge
-  // @param std::shared_ptr<Tensor> edget - List of edges
+  // @param std::shared_ptr<Tensor> edges - List of edges
   // @param std::vector<FeatureType> feature_types - Types of features, An error will be reported if the feature type
   // does not exist.
   // @param Tensor *out - Returned features
   // @return Status - The error code return
-  Status GetEdgeFeature(const std::shared_ptr<Tensor> &edget, const std::vector<FeatureType> &feature_types,
+  Status GetEdgeFeature(const std::shared_ptr<Tensor> &edges, const std::vector<FeatureType> &feature_types,
-                        TensorRow *out);
+                        TensorRow *out) override;
+
+  Status GetEdgeFeatureSharedMemory(const std::shared_ptr<Tensor> &edges, FeatureType type,
+                                    std::shared_ptr<Tensor> *out);
 
   // Get meta information of graph
   // @param MetaInfo *meta_info - Returned meta information
@@ -142,15 +137,34 @@ class Graph {
 
 #ifdef ENABLE_PYTHON
   // Return meta information to python layer
-  Status GraphInfo(py::dict *out);
+  Status GraphInfo(py::dict *out) override;
 #endif
 
-  Status Init();
+  const std::unordered_map<FeatureType, std::shared_ptr<Feature>> *GetAllDefaultNodeFeatures() {
+    return &default_node_feature_map_;
+  }
+
+  const std::unordered_map<FeatureType, std::shared_ptr<Feature>> *GetAllDefaultEdgeFeatures() {
+    return &default_edge_feature_map_;
+  }
+
+  Status Init() override;
+
+  Status Stop() override { return Status::OK(); }
+
+  std::string GetDataSchema() { return data_schema_.dump(); }
+
+#if !defined(_WIN32) && !defined(_WIN64)
+  key_t GetSharedMemoryKey() { return graph_shared_memory_->memory_key(); }
+
+  int64_t GetSharedMemorySize() { return graph_shared_memory_->memory_size(); }
+#endif
 
  private:
+  friend class GraphLoader;
   class RandomWalkBase {
    public:
-    explicit RandomWalkBase(Graph *graph);
+    explicit RandomWalkBase(GraphDataImpl *graph);
 
     Status Build(const std::vector<NodeIdType> &node_list, const std::vector<NodeType> &meta_path,
                  float step_home_param = 1.0, float step_away_param = 1.0, NodeIdType default_node = -1,
@@ -176,7 +190,7 @@ class Graph {
     template <typename T>
     std::vector<float> Normalize(const std::vector<T> &non_normalized_probability);
 
-    Graph *graph_;
+    GraphDataImpl *graph_;
     std::vector<NodeIdType> node_list_;
     std::vector<NodeType> meta_path_;
     float step_home_param_;  // Return hyper parameter. Default is 1.0
@@ -248,7 +262,11 @@ class Graph {
   int32_t num_workers_;  // The number of worker threads
   std::mt19937 rnd_;
   RandomWalkBase random_walk_;
-
+  mindrecord::json data_schema_;
+  bool server_mode_;
+#if !defined(_WIN32) && !defined(_WIN64)
+  std::unique_ptr<GraphSharedMemory> graph_shared_memory_;
+#endif
   std::unordered_map<NodeType, std::vector<NodeIdType>> node_type_map_;
   std::unordered_map<NodeIdType, std::shared_ptr<Node>> node_id_map_;
 
@@ -264,4 +282,4 @@ class Graph {
 }  // namespace gnn
 }  // namespace dataset
 }  // namespace mindspore
-#endif  // MINDSPORE_CCSRC_MINDDATA_DATASET_ENGINE_GNN_GRAPH_H_
+#endif  // MINDSPORE_CCSRC_MINDDATA_DATASET_ENGINE_GNN_GRAPH_DATA_IMPL_H_

mindspore/ccsrc/minddata/dataset/engine/gnn/graph_data_server.cc

@@ -0,0 +1,133 @@
+/**
+ * Copyright 2020 Huawei Technologies Co., Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#include "minddata/dataset/engine/gnn/graph_data_server.h"
+
+#include <algorithm>
+#include <functional>
+#include <iterator>
+#include <numeric>
+#include <utility>
+
+#include "minddata/dataset/core/tensor_shape.h"
+#include "minddata/dataset/engine/gnn/graph_data_impl.h"
+#include "minddata/dataset/util/random.h"
+
+namespace mindspore {
+namespace dataset {
+namespace gnn {
+
+GraphDataServer::GraphDataServer(const std::string &dataset_file, int32_t num_workers, const std::string &hostname,
+                                 int32_t port, int32_t client_num, bool auto_shutdown)
+    : dataset_file_(dataset_file),
+      num_workers_(num_workers),
+      client_num_(client_num),
+      max_connected_client_num_(0),
+      auto_shutdown_(auto_shutdown),
+      state_(kGdsUninit) {
+  tg_ = std::make_unique<TaskGroup>();
+  graph_data_impl_ = std::make_unique<GraphDataImpl>(dataset_file, num_workers, true);
+#if !defined(_WIN32) && !defined(_WIN64)
+  service_impl_ = std::make_unique<GraphDataServiceImpl>(this, graph_data_impl_.get());
+  async_server_ = std::make_unique<GraphDataGrpcServer>(hostname, port, service_impl_.get());
+#endif
+}
+
+Status GraphDataServer::Init() {
+#if defined(_WIN32) || defined(_WIN64)
+  RETURN_STATUS_UNEXPECTED("Graph data server is not supported in Windows OS");
+#else
+  set_state(kGdsInitializing);
+  RETURN_IF_NOT_OK(async_server_->Run());
+  // RETURN_IF_NOT_OK(InitGraphDataImpl());
+  RETURN_IF_NOT_OK(tg_->CreateAsyncTask("init graph data impl", std::bind(&GraphDataServer::InitGraphDataImpl, this)));
+  for (int32_t i = 0; i < num_workers_; ++i) {
+    RETURN_IF_NOT_OK(
+      tg_->CreateAsyncTask("start async rpc service", std::bind(&GraphDataServer::StartAsyncRpcService, this)));
+  }
+  if (auto_shutdown_) {
+    RETURN_IF_NOT_OK(
+      tg_->CreateAsyncTask("judge auto shutdown server", std::bind(&GraphDataServer::JudgeAutoShutdownServer, this)));
+  }
+  return Status::OK();
+#endif
+}
+
+Status GraphDataServer::InitGraphDataImpl() {
+  TaskManager::FindMe()->Post();
+  Status s = graph_data_impl_->Init();
+  if (s.IsOk()) {
+    set_state(kGdsRunning);
+  } else {
+    (void)Stop();
+  }
+  return s;
+}
+
+#if !defined(_WIN32) && !defined(_WIN64)
+Status GraphDataServer::StartAsyncRpcService() {
+  TaskManager::FindMe()->Post();
+  RETURN_IF_NOT_OK(async_server_->HandleRequest());
+  return Status::OK();
+}
+#endif
+
+Status GraphDataServer::JudgeAutoShutdownServer() {
+  TaskManager::FindMe()->Post();
+  while (true) {
+    if (auto_shutdown_ && (max_connected_client_num_ >= client_num_) && (client_pid_.size() == 0)) {
+      MS_LOG(INFO) << "All clients have been unregister, automatically exit the server.";
+      RETURN_IF_NOT_OK(Stop());
+      break;
+    }
+    if (state_ == kGdsStopped) {
+      break;
+    }
+    std::this_thread::sleep_for(std::chrono::milliseconds(1000));
+  }
+  return Status::OK();
+}
+
+Status GraphDataServer::Stop() {
+#if !defined(_WIN32) && !defined(_WIN64)
+  async_server_->Stop();
+#endif
+  set_state(kGdsStopped);
+  graph_data_impl_.reset();
+  return Status::OK();
+}
+
+Status GraphDataServer::ClientRegister(int32_t pid) {
+  std::unique_lock<std::mutex> lck(mutex_);
+  MS_LOG(INFO) << "client register pid:" << std::to_string(pid);
+  client_pid_.emplace(pid);
+  if (client_pid_.size() > max_connected_client_num_) {
+    max_connected_client_num_ = client_pid_.size();
+  }
+  return Status::OK();
+}
+Status GraphDataServer::ClientUnRegister(int32_t pid) {
+  std::unique_lock<std::mutex> lck(mutex_);
+  auto itr = client_pid_.find(pid);
+  if (itr != client_pid_.end()) {
+    client_pid_.erase(itr);
+    MS_LOG(INFO) << "client unregister pid:" << std::to_string(pid);
+  }
+  return Status::OK();
+}
+
+}  // namespace gnn
+}  // namespace dataset
+}  // namespace mindspore

mindspore/ccsrc/minddata/dataset/engine/gnn/graph_data_server.h

@@ -0,0 +1,196 @@
+/**
+ * Copyright 2020 Huawei Technologies Co., Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#ifndef MINDSPORE_CCSRC_MINDDATA_DATASET_ENGINE_GNN_GRAPH_DATA_SERVER_H_
+#define MINDSPORE_CCSRC_MINDDATA_DATASET_ENGINE_GNN_GRAPH_DATA_SERVER_H_
+
+#include <memory>
+#include <mutex>
+#include <string>
+#include <unordered_set>
+
+#if !defined(_WIN32) && !defined(_WIN64)
+#include "grpcpp/grpcpp.h"
+#include "minddata/dataset/engine/gnn/graph_data_service_impl.h"
+#include "minddata/dataset/engine/gnn/grpc_async_server.h"
+#endif
+#include "minddata/dataset/util/task_manager.h"
+
+namespace mindspore {
+namespace dataset {
+namespace gnn {
+
+class GraphDataImpl;
+
+class GraphDataServer {
+ public:
+  enum ServerState { kGdsUninit = 0, kGdsInitializing, kGdsRunning, kGdsStopped };
+  GraphDataServer(const std::string &dataset_file, int32_t num_workers, const std::string &hostname, int32_t port,
+                  int32_t client_num, bool auto_shutdown);
+  ~GraphDataServer() = default;
+
+  Status Init();
+
+  Status Stop();
+
+  Status ClientRegister(int32_t pid);
+  Status ClientUnRegister(int32_t pid);
+
+  enum ServerState state() { return state_; }
+
+  bool IsStoped() {
+    if (state_ == kGdsStopped) {
+      return true;
+    } else {
+      return false;
+    }
+  }
+
+ private:
+  void set_state(enum ServerState state) { state_ = state; }
+
+  Status InitGraphDataImpl();
+#if !defined(_WIN32) && !defined(_WIN64)
+  Status StartAsyncRpcService();
+#endif
+  Status JudgeAutoShutdownServer();
+
+  std::string dataset_file_;
+  int32_t num_workers_;  // The number of worker threads
+  int32_t client_num_;
+  int32_t max_connected_client_num_;
+  bool auto_shutdown_;
+  enum ServerState state_;
+  std::unique_ptr<TaskGroup> tg_;  // Class for worker management
+  std::unique_ptr<GraphDataImpl> graph_data_impl_;
+  std::unordered_set<int32_t> client_pid_;
+  std::mutex mutex_;
+#if !defined(_WIN32) && !defined(_WIN64)
+  std::unique_ptr<GraphDataServiceImpl> service_impl_;
+  std::unique_ptr<GrpcAsyncServer> async_server_;
+#endif
+};
+
+#if !defined(_WIN32) && !defined(_WIN64)
+class UntypedCall {
+ public:
+  virtual ~UntypedCall() {}
+
+  virtual Status operator()() = 0;
+};
+
+template <class ServiceImpl, class AsyncService, class RequestMessage, class ResponseMessage>
+class CallData : public UntypedCall {
+ public:
+  enum class STATE : int8_t { CREATE = 1, PROCESS = 2, FINISH = 3 };
+  using EnqueueFunction = void (AsyncService::*)(grpc::ServerContext *, RequestMessage *,
+                                                 grpc::ServerAsyncResponseWriter<ResponseMessage> *,
+                                                 grpc::CompletionQueue *, grpc::ServerCompletionQueue *, void *);
+  using HandleRequestFunction = grpc::Status (ServiceImpl::*)(grpc::ServerContext *, const RequestMessage *,
+                                                              ResponseMessage *);
+  CallData(ServiceImpl *service_impl, AsyncService *async_service, grpc::ServerCompletionQueue *cq,
+           EnqueueFunction enqueue_function, HandleRequestFunction handle_request_function)
+      : status_(STATE::CREATE),
+        service_impl_(service_impl),
+        async_service_(async_service),
+        cq_(cq),
+        enqueue_function_(enqueue_function),
+        handle_request_function_(handle_request_function),
+        responder_(&ctx_) {}
+
+  ~CallData() = default;
+
+  static Status EnqueueRequest(ServiceImpl *service_impl, AsyncService *async_service, grpc::ServerCompletionQueue *cq,
+                               EnqueueFunction enqueue_function, HandleRequestFunction handle_request_function) {
+    auto call = new CallData<ServiceImpl, AsyncService, RequestMessage, ResponseMessage>(
+      service_impl, async_service, cq, enqueue_function, handle_request_function);
+    RETURN_IF_NOT_OK((*call)());
+    return Status::OK();
+  }
+
+  Status operator()() {
+    if (status_ == STATE::CREATE) {
+      status_ = STATE::PROCESS;
+      (async_service_->*enqueue_function_)(&ctx_, &request_, &responder_, cq_, cq_, this);
+    } else if (status_ == STATE::PROCESS) {
+      EnqueueRequest(service_impl_, async_service_, cq_, enqueue_function_, handle_request_function_);
+      status_ = STATE::FINISH;
+      // new CallData(service_, cq_, this->s_type_);
+      grpc::Status s = (service_impl_->*handle_request_function_)(&ctx_, &request_, &response_);
+      responder_.Finish(response_, s, this);
+    } else {
+      GPR_ASSERT(status_ == STATE::FINISH);
+      delete this;
+    }
+    return Status::OK();
+  }
+
+ private:
+  STATE status_;
+  ServiceImpl *service_impl_;
+  AsyncService *async_service_;
+  grpc::ServerCompletionQueue *cq_;
+  EnqueueFunction enqueue_function_;
+  HandleRequestFunction handle_request_function_;
+  grpc::ServerContext ctx_;
+  grpc::ServerAsyncResponseWriter<ResponseMessage> responder_;
+  RequestMessage request_;
+  ResponseMessage response_;
+};
+
+#define ENQUEUE_REQUEST(service_impl, async_service, cq, method, request_msg, response_msg)                       \
+  do {                                                                                                            \
+    Status s =                                                                                                    \
+      CallData<gnn::GraphDataServiceImpl, GnnGraphData::AsyncService, request_msg, response_msg>::EnqueueRequest( \
+        service_impl, async_service, cq, &GnnGraphData::AsyncService::Request##method,                            \
+        &gnn::GraphDataServiceImpl::method);                                                                      \
+    RETURN_IF_NOT_OK(s);                                                                                          \
+  } while (0)
+
+class GraphDataGrpcServer : public GrpcAsyncServer {
+ public:
+  GraphDataGrpcServer(const std::string &host, int32_t port, GraphDataServiceImpl *service_impl)
+      : GrpcAsyncServer(host, port), service_impl_(service_impl) {}
+
+  Status RegisterService(grpc::ServerBuilder *builder) {
+    builder->RegisterService(&svc_);
+    return Status::OK();
+  }
+
+  Status EnqueueRequest() {
+    ENQUEUE_REQUEST(service_impl_, &svc_, cq_.get(), ClientRegister, GnnClientRegisterRequestPb,
+                    GnnClientRegisterResponsePb);
+    ENQUEUE_REQUEST(service_impl_, &svc_, cq_.get(), ClientUnRegister, GnnClientUnRegisterRequestPb,
+                    GnnClientUnRegisterResponsePb);
+    ENQUEUE_REQUEST(service_impl_, &svc_, cq_.get(), GetGraphData, GnnGraphDataRequestPb, GnnGraphDataResponsePb);
+    ENQUEUE_REQUEST(service_impl_, &svc_, cq_.get(), GetMetaInfo, GnnMetaInfoRequestPb, GnnMetaInfoResponsePb);
+    return Status::OK();
+  }
+
+  Status ProcessRequest(void *tag) {
+    auto rq = static_cast<UntypedCall *>(tag);
+    RETURN_IF_NOT_OK((*rq)());
+    return Status::OK();
+  }
+
+ private:
+  GraphDataServiceImpl *service_impl_;
+  GnnGraphData::AsyncService svc_;
+};
+#endif
+}  // namespace gnn
+}  // namespace dataset
+}  // namespace mindspore
+#endif  // MINDSPORE_CCSRC_MINDDATA_DATASET_ENGINE_GNN_GRAPH_DATA_SERVER_H_

mindspore/ccsrc/minddata/dataset/engine/gnn/graph_data_service_impl.cc

@@ -0,0 +1,299 @@
+/**
+ * Copyright 2020 Huawei Technologies Co., Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#include "minddata/dataset/engine/gnn/graph_data_service_impl.h"
+
+#include <algorithm>
+#include <unordered_map>
+#include <vector>
+
+#include "minddata/dataset/engine/gnn/tensor_proto.h"
+#include "minddata/dataset/engine/gnn/graph_data_server.h"
+
+namespace mindspore {
+namespace dataset {
+namespace gnn {
+
+using pFunction = Status (GraphDataServiceImpl::*)(const GnnGraphDataRequestPb *, GnnGraphDataResponsePb *);
+static std::unordered_map<uint32_t, pFunction> g_get_graph_data_func_ = {
+  {GET_ALL_NODES, &GraphDataServiceImpl::GetAllNodes},
+  {GET_ALL_EDGES, &GraphDataServiceImpl::GetAllEdges},
+  {GET_NODES_FROM_EDGES, &GraphDataServiceImpl::GetNodesFromEdges},
+  {GET_ALL_NEIGHBORS, &GraphDataServiceImpl::GetAllNeighbors},
+  {GET_SAMPLED_NEIGHBORS, &GraphDataServiceImpl::GetSampledNeighbors},
+  {GET_NEG_SAMPLED_NEIGHBORS, &GraphDataServiceImpl::GetNegSampledNeighbors},
+  {RANDOM_WALK, &GraphDataServiceImpl::RandomWalk},
+  {GET_NODE_FEATURE, &GraphDataServiceImpl::GetNodeFeature},
+  {GET_EDGE_FEATURE, &GraphDataServiceImpl::GetEdgeFeature}};
+
+GraphDataServiceImpl::GraphDataServiceImpl(GraphDataServer *server, GraphDataImpl *graph_data_impl)
+    : server_(server), graph_data_impl_(graph_data_impl) {}
+
+Status GraphDataServiceImpl::FillDefaultFeature(GnnClientRegisterResponsePb *response) {
+  const auto default_node_features = graph_data_impl_->GetAllDefaultNodeFeatures();
+  for (const auto feature : *default_node_features) {
+    GnnFeatureInfoPb *feature_info = response->add_default_node_feature();
+    feature_info->set_type(feature.first);
+    RETURN_IF_NOT_OK(TensorToPb(feature.second->Value(), feature_info->mutable_feature()));
+  }
+  const auto default_edge_features = graph_data_impl_->GetAllDefaultEdgeFeatures();
+  for (const auto feature : *default_edge_features) {
+    GnnFeatureInfoPb *feature_info = response->add_default_edge_feature();
+    feature_info->set_type(feature.first);
+    RETURN_IF_NOT_OK(TensorToPb(feature.second->Value(), feature_info->mutable_feature()));
+  }
+  return Status::OK();
+}
+
+grpc::Status GraphDataServiceImpl::ClientRegister(grpc::ServerContext *context,
+                                                  const GnnClientRegisterRequestPb *request,
+                                                  GnnClientRegisterResponsePb *response) {
+  Status s = server_->ClientRegister(request->pid());
+  if (s.IsOk()) {
+    switch (server_->state()) {
+      case GraphDataServer::kGdsUninit:
+      case GraphDataServer::kGdsInitializing:
+        response->set_error_msg("Initializing");
+        break;
+      case GraphDataServer::kGdsRunning:
+        response->set_error_msg("Success");
+        response->set_data_schema(graph_data_impl_->GetDataSchema());
+        response->set_shared_memory_key(graph_data_impl_->GetSharedMemoryKey());
+        response->set_shared_memory_size(graph_data_impl_->GetSharedMemorySize());
+        s = FillDefaultFeature(response);
+        if (!s.IsOk()) {
+          response->set_error_msg(s.ToString());
+        }
+        break;
+      case GraphDataServer::kGdsStopped:
+        response->set_error_msg("Stoped");
+        break;
+    }
+  } else {
+    response->set_error_msg(s.ToString());
+  }
+  return ::grpc::Status::OK;
+}
+
+grpc::Status GraphDataServiceImpl::ClientUnRegister(grpc::ServerContext *context,
+                                                    const GnnClientUnRegisterRequestPb *request,
+                                                    GnnClientUnRegisterResponsePb *response) {
+  Status s = server_->ClientUnRegister(request->pid());
+  if (s.IsOk()) {
+    response->set_error_msg("Success");
+  } else {
+    response->set_error_msg(s.ToString());
+  }
+  return ::grpc::Status::OK;
+}
+
+grpc::Status GraphDataServiceImpl::GetGraphData(grpc::ServerContext *context, const GnnGraphDataRequestPb *request,
+                                                GnnGraphDataResponsePb *response) {
+  // MS_LOG(INFO) << "#### receive GetGraphData:" << request->op_name();
+  Status s;
+  auto iter = g_get_graph_data_func_.find(request->op_name());
+  if (iter != g_get_graph_data_func_.end()) {
+    pFunction func = iter->second;
+    s = (this->*func)(request, response);
+    if (s.IsOk()) {
+      response->set_error_msg("Success");
+    } else {
+      response->set_error_msg(s.ToString());
+    }
+  } else {
+    response->set_error_msg("Invalid op name.");
+  }
+  // MS_LOG(INFO) << "#### end receive GetGraphData:" << request->op_name();
+  return ::grpc::Status::OK;
+}
+
+grpc::Status GraphDataServiceImpl::GetMetaInfo(grpc::ServerContext *context, const GnnMetaInfoRequestPb *request,
+                                               GnnMetaInfoResponsePb *response) {
+  MetaInfo meta_info;
+  Status s = graph_data_impl_->GetMetaInfo(&meta_info);
+  if (s.IsOk()) {
+    response->set_error_msg("Success");
+    for (const auto &type : meta_info.node_type) {
+      auto node_info = response->add_node_info();
+      node_info->set_type(static_cast<google::protobuf::int32>(type));
+      auto itr = meta_info.node_num.find(type);
+      if (itr != meta_info.node_num.end()) {
+        node_info->set_num(static_cast<google::protobuf::int32>(itr->second));
+      } else {
+        node_info->set_num(0);
+      }
+    }
+    for (const auto &type : meta_info.edge_type) {
+      auto edge_info = response->add_edge_info();
+      edge_info->set_type(static_cast<google::protobuf::int32>(type));
+      auto itr = meta_info.edge_num.find(type);
+      if (itr != meta_info.edge_num.end()) {
+        edge_info->set_num(static_cast<google::protobuf::int32>(itr->second));
+      } else {
+        edge_info->set_num(0);
+      }
+    }
+    for (const auto &type : meta_info.node_feature_type) {
+      response->add_node_feature_type(static_cast<google::protobuf::int32>(type));
+    }
+    for (const auto &type : meta_info.edge_feature_type) {
+      response->add_edge_feature_type(static_cast<google::protobuf::int32>(type));
+    }
+  } else {
+    response->set_error_msg(s.ToString());
+  }
+  return ::grpc::Status::OK;
+}
+
+Status GraphDataServiceImpl::GetAllNodes(const GnnGraphDataRequestPb *request, GnnGraphDataResponsePb *response) {
+  CHECK_FAIL_RETURN_UNEXPECTED(request->type_size() == 1, "The number of edge types is not 1");
+
+  std::shared_ptr<Tensor> tensor;
+  RETURN_IF_NOT_OK(graph_data_impl_->GetAllNodes(static_cast<NodeType>(request->type()[0]), &tensor));
+  TensorPb *result = response->add_result_data();
+  RETURN_IF_NOT_OK(TensorToPb(tensor, result));
+  return Status::OK();
+}
+
+Status GraphDataServiceImpl::GetAllEdges(const GnnGraphDataRequestPb *request, GnnGraphDataResponsePb *response) {
+  CHECK_FAIL_RETURN_UNEXPECTED(request->type_size() == 1, "The number of edge types is not 1");
+
+  std::shared_ptr<Tensor> tensor;
+  RETURN_IF_NOT_OK(graph_data_impl_->GetAllEdges(static_cast<EdgeType>(request->type()[0]), &tensor));
+  TensorPb *result = response->add_result_data();
+  RETURN_IF_NOT_OK(TensorToPb(tensor, result));
+  return Status::OK();
+}
+
+Status GraphDataServiceImpl::GetNodesFromEdges(const GnnGraphDataRequestPb *request, GnnGraphDataResponsePb *response) {
+  CHECK_FAIL_RETURN_UNEXPECTED(request->id_size() > 0, "The input edge id is empty");
+
+  std::vector<EdgeIdType> edge_list;
+  edge_list.resize(request->id().size());
+  std::transform(request->id().begin(), request->id().end(), edge_list.begin(),
+                 [](const google::protobuf::int32 id) { return static_cast<EdgeIdType>(id); });
+  std::shared_ptr<Tensor> tensor;
+  RETURN_IF_NOT_OK(graph_data_impl_->GetNodesFromEdges(edge_list, &tensor));
+  TensorPb *result = response->add_result_data();
+  RETURN_IF_NOT_OK(TensorToPb(tensor, result));
+  return Status::OK();
+}
+
+Status GraphDataServiceImpl::GetAllNeighbors(const GnnGraphDataRequestPb *request, GnnGraphDataResponsePb *response) {
+  CHECK_FAIL_RETURN_UNEXPECTED(request->id_size() > 0, "The input node id is empty");
+  CHECK_FAIL_RETURN_UNEXPECTED(request->type_size() == 1, "The number of edge types is not 1");
+
+  std::vector<NodeIdType> node_list;
+  node_list.resize(request->id().size());
+  std::transform(request->id().begin(), request->id().end(), node_list.begin(),
+                 [](const google::protobuf::int32 id) { return static_cast<NodeIdType>(id); });
+  std::shared_ptr<Tensor> tensor;
+  RETURN_IF_NOT_OK(graph_data_impl_->GetAllNeighbors(node_list, static_cast<NodeType>(request->type()[0]), &tensor));
+  TensorPb *result = response->add_result_data();
+  RETURN_IF_NOT_OK(TensorToPb(tensor, result));
+  return Status::OK();
+}
+
+Status GraphDataServiceImpl::GetSampledNeighbors(const GnnGraphDataRequestPb *request,
+                                                 GnnGraphDataResponsePb *response) {
+  CHECK_FAIL_RETURN_UNEXPECTED(request->id_size() > 0, "The input node id is empty");
+  CHECK_FAIL_RETURN_UNEXPECTED(request->number_size() > 0, "The input neighbor number is empty");
+  CHECK_FAIL_RETURN_UNEXPECTED(request->type_size() > 0, "The input neighbor type is empty");
+
+  std::vector<NodeIdType> node_list;
+  node_list.resize(request->id().size());
+  std::transform(request->id().begin(), request->id().end(), node_list.begin(),
+                 [](const google::protobuf::int32 id) { return static_cast<NodeIdType>(id); });
+  std::vector<NodeIdType> neighbor_nums;
+  neighbor_nums.resize(request->number().size());
+  std::transform(request->number().begin(), request->number().end(), neighbor_nums.begin(),
+                 [](const google::protobuf::int32 num) { return static_cast<NodeIdType>(num); });
+  std::vector<NodeType> neighbor_types;
+  neighbor_types.resize(request->type().size());
+  std::transform(request->type().begin(), request->type().end(), neighbor_types.begin(),
+                 [](const google::protobuf::int32 type) { return static_cast<NodeType>(type); });
+  std::shared_ptr<Tensor> tensor;
+  RETURN_IF_NOT_OK(graph_data_impl_->GetSampledNeighbors(node_list, neighbor_nums, neighbor_types, &tensor));
+  TensorPb *result = response->add_result_data();
+  RETURN_IF_NOT_OK(TensorToPb(tensor, result));
+  return Status::OK();
+}
+
+Status GraphDataServiceImpl::GetNegSampledNeighbors(const GnnGraphDataRequestPb *request,
+                                                    GnnGraphDataResponsePb *response) {
+  CHECK_FAIL_RETURN_UNEXPECTED(request->id_size() > 0, "The input node id is empty");
+  CHECK_FAIL_RETURN_UNEXPECTED(request->number_size() == 1, "The number of neighbor number is not 1");
+  CHECK_FAIL_RETURN_UNEXPECTED(request->type_size() == 1, "The number of neighbor types is not 1");
+
+  std::vector<NodeIdType> node_list;
+  node_list.resize(request->id().size());
+  std::transform(request->id().begin(), request->id().end(), node_list.begin(),
+                 [](const google::protobuf::int32 id) { return static_cast<NodeIdType>(id); });
+  std::shared_ptr<Tensor> tensor;
+  RETURN_IF_NOT_OK(graph_data_impl_->GetNegSampledNeighbors(node_list, static_cast<NodeIdType>(request->number()[0]),
+                                                            static_cast<NodeType>(request->type()[0]), &tensor));
+  TensorPb *result = response->add_result_data();
+  RETURN_IF_NOT_OK(TensorToPb(tensor, result));
+  return Status::OK();
+}
+
+Status GraphDataServiceImpl::RandomWalk(const GnnGraphDataRequestPb *request, GnnGraphDataResponsePb *response) {
+  CHECK_FAIL_RETURN_UNEXPECTED(request->id_size() > 0, "The input node id is empty");
+  CHECK_FAIL_RETURN_UNEXPECTED(request->type_size() > 0, "The input meta path is empty");
+
+  std::vector<NodeIdType> node_list;
+  node_list.resize(request->id().size());
+  std::transform(request->id().begin(), request->id().end(), node_list.begin(),
+                 [](const google::protobuf::int32 id) { return static_cast<NodeIdType>(id); });
+  std::vector<NodeType> meta_path;
+  meta_path.resize(request->type().size());
+  std::transform(request->type().begin(), request->type().end(), meta_path.begin(),
+                 [](const google::protobuf::int32 type) { return static_cast<NodeType>(type); });
+  std::shared_ptr<Tensor> tensor;
+  RETURN_IF_NOT_OK(graph_data_impl_->RandomWalk(node_list, meta_path, request->random_walk().p(),
+                                                request->random_walk().q(), request->random_walk().default_id(),
+                                                &tensor));
+  TensorPb *result = response->add_result_data();
+  RETURN_IF_NOT_OK(TensorToPb(tensor, result));
+  return Status::OK();
+}
+
+Status GraphDataServiceImpl::GetNodeFeature(const GnnGraphDataRequestPb *request, GnnGraphDataResponsePb *response) {
+  std::shared_ptr<Tensor> nodes;
+  RETURN_IF_NOT_OK(PbToTensor(&request->id_tensor(), &nodes));
+  for (const auto &type : request->type()) {
+    std::shared_ptr<Tensor> tensor;
+    RETURN_IF_NOT_OK(graph_data_impl_->GetNodeFeatureSharedMemory(nodes, type, &tensor));
+    TensorPb *result = response->add_result_data();
+    RETURN_IF_NOT_OK(TensorToPb(tensor, result));
+  }
+  return Status::OK();
+}
+
+Status GraphDataServiceImpl::GetEdgeFeature(const GnnGraphDataRequestPb *request, GnnGraphDataResponsePb *response) {
+  std::shared_ptr<Tensor> edges;
+  RETURN_IF_NOT_OK(PbToTensor(&request->id_tensor(), &edges));
+  for (const auto &type : request->type()) {
+    std::shared_ptr<Tensor> tensor;
+    RETURN_IF_NOT_OK(graph_data_impl_->GetEdgeFeatureSharedMemory(edges, type, &tensor));
+    TensorPb *result = response->add_result_data();
+    RETURN_IF_NOT_OK(TensorToPb(tensor, result));
+  }
+  return Status::OK();
+}
+
+}  // namespace gnn
+}  // namespace dataset
+}  // namespace mindspore

mindspore/ccsrc/minddata/dataset/engine/gnn/graph_data_service_impl.h

@@ -0,0 +1,70 @@
+/**
+ * Copyright 2020 Huawei Technologies Co., Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#ifndef MINDSPORE_CCSRC_MINDDATA_DATASET_ENGINE_GNN_GRAPH_DATA_SERVICE_IMPL_H_
+#define MINDSPORE_CCSRC_MINDDATA_DATASET_ENGINE_GNN_GRAPH_DATA_SERVICE_IMPL_H_
+
+#include <memory>
+#include <string>
+
+#include "minddata/dataset/engine/gnn/graph_data_impl.h"
+#include "proto/gnn_graph_data.grpc.pb.h"
+#include "proto/gnn_graph_data.pb.h"
+
+namespace mindspore {
+namespace dataset {
+namespace gnn {
+
+class GraphDataServer;
+
+// class GraphDataServiceImpl : public GnnGraphData::Service {
+class GraphDataServiceImpl {
+ public:
+  GraphDataServiceImpl(GraphDataServer *server, GraphDataImpl *graph_data_impl);
+  ~GraphDataServiceImpl() = default;
+
+  grpc::Status ClientRegister(grpc::ServerContext *context, const GnnClientRegisterRequestPb *request,
+                              GnnClientRegisterResponsePb *response);
+
+  grpc::Status ClientUnRegister(grpc::ServerContext *context, const GnnClientUnRegisterRequestPb *request,
+                                GnnClientUnRegisterResponsePb *response);
+
+  grpc::Status GetGraphData(grpc::ServerContext *context, const GnnGraphDataRequestPb *request,
+                            GnnGraphDataResponsePb *response);
+
+  grpc::Status GetMetaInfo(grpc::ServerContext *context, const GnnMetaInfoRequestPb *request,
+                           GnnMetaInfoResponsePb *response);
+
+  Status GetAllNodes(const GnnGraphDataRequestPb *request, GnnGraphDataResponsePb *response);
+  Status GetAllEdges(const GnnGraphDataRequestPb *request, GnnGraphDataResponsePb *response);
+  Status GetNodesFromEdges(const GnnGraphDataRequestPb *request, GnnGraphDataResponsePb *response);
+  Status GetAllNeighbors(const GnnGraphDataRequestPb *request, GnnGraphDataResponsePb *response);
+  Status GetSampledNeighbors(const GnnGraphDataRequestPb *request, GnnGraphDataResponsePb *response);
+  Status GetNegSampledNeighbors(const GnnGraphDataRequestPb *request, GnnGraphDataResponsePb *response);
+  Status RandomWalk(const GnnGraphDataRequestPb *request, GnnGraphDataResponsePb *response);
+  Status GetNodeFeature(const GnnGraphDataRequestPb *request, GnnGraphDataResponsePb *response);
+  Status GetEdgeFeature(const GnnGraphDataRequestPb *request, GnnGraphDataResponsePb *response);
+
+ private:
+  Status FillDefaultFeature(GnnClientRegisterResponsePb *response);
+
+  GraphDataServer *server_;
+  GraphDataImpl *graph_data_impl_;
+};
+
+}  // namespace gnn
+}  // namespace dataset
+}  // namespace mindspore
+#endif  // MINDSPORE_CCSRC_MINDDATA_DATASET_ENGINE_GNN_GRAPH_DATA_SERVICE_IMPL_H_

mindspore/ccsrc/minddata/dataset/engine/gnn/graph_feature_parser.cc

@@ -0,0 +1,106 @@
+/**
+ * Copyright 2020 Huawei Technologies Co., Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "minddata/dataset/engine/gnn/graph_feature_parser.h"
+
+#include <memory>
+#include <utility>
+
+#include "mindspore/ccsrc/minddata/mindrecord/include/shard_error.h"
+
+namespace mindspore {
+namespace dataset {
+namespace gnn {
+
+using mindrecord::MSRStatus;
+
+GraphFeatureParser::GraphFeatureParser(const ShardColumn &shard_column) {
+  shard_column_ = std::make_unique<ShardColumn>(shard_column);
+}
+
+Status GraphFeatureParser::LoadFeatureTensor(const std::string &key, const std::vector<uint8_t> &col_blob,
+                                             std::shared_ptr<Tensor> *tensor) {
+  const unsigned char *data = nullptr;
+  std::unique_ptr<unsigned char[]> data_ptr;
+  uint64_t n_bytes = 0, col_type_size = 1;
+  mindrecord::ColumnDataType col_type = mindrecord::ColumnNoDataType;
+  std::vector<int64_t> column_shape;
+  MSRStatus rs = shard_column_->GetColumnValueByName(key, col_blob, {}, &data, &data_ptr, &n_bytes, &col_type,
+                                                     &col_type_size, &column_shape);
+  CHECK_FAIL_RETURN_UNEXPECTED(rs == mindrecord::SUCCESS, "fail to load column" + key);
+  if (data == nullptr) data = reinterpret_cast<const unsigned char *>(&data_ptr[0]);
+  RETURN_IF_NOT_OK(Tensor::CreateFromMemory(std::move(TensorShape({static_cast<dsize_t>(n_bytes / col_type_size)})),
+                                            std::move(DataType(mindrecord::ColumnDataTypeNameNormalized[col_type])),
+                                            data, tensor));
+  return Status::OK();
+}
+
+#if !defined(_WIN32) && !defined(_WIN64)
+Status GraphFeatureParser::LoadFeatureToSharedMemory(const std::string &key, const std::vector<uint8_t> &col_blob,
+                                                     GraphSharedMemory *shared_memory,
+                                                     std::shared_ptr<Tensor> *out_tensor) {
+  const unsigned char *data = nullptr;
+  std::unique_ptr<unsigned char[]> data_ptr;
+  uint64_t n_bytes = 0, col_type_size = 1;
+  mindrecord::ColumnDataType col_type = mindrecord::ColumnNoDataType;
+  std::vector<int64_t> column_shape;
+  MSRStatus rs = shard_column_->GetColumnValueByName(key, col_blob, {}, &data, &data_ptr, &n_bytes, &col_type,
+                                                     &col_type_size, &column_shape);
+  CHECK_FAIL_RETURN_UNEXPECTED(rs == mindrecord::SUCCESS, "fail to load column" + key);
+  if (data == nullptr) data = reinterpret_cast<const unsigned char *>(&data_ptr[0]);
+  std::shared_ptr<Tensor> tensor;
+  RETURN_IF_NOT_OK(Tensor::CreateEmpty(std::move(TensorShape({2})), std::move(DataType(DataType::DE_INT64)), &tensor));
+  auto fea_itr = tensor->begin<int64_t>();
+  int64_t offset = 0;
+  RETURN_IF_NOT_OK(shared_memory->InsertData(data, n_bytes, &offset));
+  *fea_itr = offset;
+  ++fea_itr;
+  *fea_itr = n_bytes;
+  *out_tensor = std::move(tensor);
+  return Status::OK();
+}
+#endif
+
+Status GraphFeatureParser::LoadFeatureIndex(const std::string &key, const std::vector<uint8_t> &col_blob,
+                                            std::vector<int32_t> *indices) {
+  const unsigned char *data = nullptr;
+  std::unique_ptr<unsigned char[]> data_ptr;
+  uint64_t n_bytes = 0, col_type_size = 1;
+  mindrecord::ColumnDataType col_type = mindrecord::ColumnNoDataType;
+  std::vector<int64_t> column_shape;
+  MSRStatus rs = shard_column_->GetColumnValueByName(key, col_blob, {}, &data, &data_ptr, &n_bytes, &col_type,
+                                                     &col_type_size, &column_shape);
+  CHECK_FAIL_RETURN_UNEXPECTED(rs == mindrecord::SUCCESS, "fail to load column:" + key);
+
+  if (data == nullptr) data = reinterpret_cast<const unsigned char *>(&data_ptr[0]);
+
+  for (int i = 0; i < n_bytes; i += col_type_size) {
+    int32_t feature_ind = -1;
+    if (col_type == mindrecord::ColumnInt32) {
+      feature_ind = *(reinterpret_cast<const int32_t *>(data + i));
+    } else if (col_type == mindrecord::ColumnInt64) {
+      feature_ind = *(reinterpret_cast<const int64_t *>(data + i));
+    } else {
+      RETURN_STATUS_UNEXPECTED("Feature Index needs to be int32/int64 type!");
+    }
+    if (feature_ind >= 0) indices->push_back(feature_ind);
+  }
+  return Status::OK();
+}
+
+}  // namespace gnn
+}  // namespace dataset
+}  // namespace mindspore

mindspore/ccsrc/minddata/dataset/engine/gnn/graph_feature_parser.h

@@ -0,0 +1,67 @@
+/**
+ * Copyright 2020 Huawei Technologies Co., Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#ifndef MINDSPORE_CCSRC_MINDDATA_DATASET_ENGINE_GNN_GRAPH_FEATURE_PARSER_H_
+#define MINDSPORE_CCSRC_MINDDATA_DATASET_ENGINE_GNN_GRAPH_FEATURE_PARSER_H_
+#include <memory>
+#include <queue>
+#include <string>
+#include <unordered_map>
+#include <unordered_set>
+#include <vector>
+
+#include "minddata/dataset/core/data_type.h"
+#include "minddata/dataset/core/tensor.h"
+#if !defined(_WIN32) && !defined(_WIN64)
+#include "minddata/dataset/engine/gnn/graph_shared_memory.h"
+#endif
+#include "minddata/dataset/engine/gnn/feature.h"
+#include "minddata/dataset/util/status.h"
+#include "minddata/mindrecord/include/shard_column.h"
+
+namespace mindspore {
+namespace dataset {
+namespace gnn {
+
+using mindrecord::ShardColumn;
+
+class GraphFeatureParser {
+ public:
+  explicit GraphFeatureParser(const ShardColumn &shard_column);
+
+  ~GraphFeatureParser() = default;
+
+  // @param std::string key - column name
+  // @param std::vector<uint8_t> &blob - contains data in blob field in mindrecord
+  // @param std::vector<int32_t> *ind - return value, list of feature index in int32_t
+  // @return Status - the status code
+  Status LoadFeatureIndex(const std::string &key, const std::vector<uint8_t> &blob, std::vector<int32_t> *ind);
+
+  // @param std::string &key - column name
+  // @param std::vector<uint8_t> &blob - contains data in blob field in mindrecord
+  // @param std::shared_ptr<Tensor> *tensor - return value feature tensor
+  // @return Status - the status code
+  Status LoadFeatureTensor(const std::string &key, const std::vector<uint8_t> &blob, std::shared_ptr<Tensor> *tensor);
+#if !defined(_WIN32) && !defined(_WIN64)
+  Status LoadFeatureToSharedMemory(const std::string &key, const std::vector<uint8_t> &col_blob,
+                                   GraphSharedMemory *shared_memory, std::shared_ptr<Tensor> *out_tensor);
+#endif
+ private:
+  std::unique_ptr<ShardColumn> shard_column_;
+};
+}  // namespace gnn
+}  // namespace dataset
+}  // namespace mindspore
+#endif  // MINDSPORE_CCSRC_MINDDATA_DATASET_ENGINE_GNN_GRAPH_FEATURE_PARSER_H_

mindspore/ccsrc/minddata/dataset/engine/gnn/graph_loader.cc

@@ -13,41 +13,42 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+#include "minddata/dataset/engine/gnn/graph_loader.h"
 
 #include <future>
 #include <tuple>
 #include <utility>
 
-#include "minddata/dataset/engine/gnn/graph_loader.h"
+#include "minddata/dataset/engine/gnn/graph_data_impl.h"
-#include "mindspore/ccsrc/minddata/mindrecord/include/shard_error.h"
 #include "minddata/dataset/engine/gnn/local_edge.h"
 #include "minddata/dataset/engine/gnn/local_node.h"
 #include "minddata/dataset/util/task_manager.h"
+#include "minddata/mindrecord/include/shard_error.h"
 
 using ShardTuple = std::vector<std::tuple<std::vector<uint8_t>, mindspore::mindrecord::json>>;
-
 namespace mindspore {
 namespace dataset {
 namespace gnn {
 
 using mindrecord::MSRStatus;
 
-GraphLoader::GraphLoader(std::string mr_filepath, int32_t num_workers)
+GraphLoader::GraphLoader(GraphDataImpl *graph_impl, std::string mr_filepath, int32_t num_workers, bool server_mode)
-    : mr_path_(mr_filepath),
+    : graph_impl_(graph_impl),
+      mr_path_(mr_filepath),
       num_workers_(num_workers),
       row_id_(0),
       shard_reader_(nullptr),
+      graph_feature_parser_(nullptr),
       keys_({"first_id", "second_id", "third_id", "attribute", "type", "node_feature_index", "edge_feature_index"}) {}
 
-Status GraphLoader::GetNodesAndEdges(NodeIdMap *n_id_map, EdgeIdMap *e_id_map, NodeTypeMap *n_type_map,
+Status GraphLoader::GetNodesAndEdges() {
-                                     EdgeTypeMap *e_type_map, NodeFeatureMap *n_feature_map,
+  NodeIdMap *n_id_map = &graph_impl_->node_id_map_;
-                                     EdgeFeatureMap *e_feature_map, DefaultNodeFeatureMap *default_node_feature_map,
+  EdgeIdMap *e_id_map = &graph_impl_->edge_id_map_;
-                                     DefaultEdgeFeatureMap *default_edge_feature_map) {
   for (std::deque<std::shared_ptr<Node>> &dq : n_deques_) {
     while (dq.empty() == false) {
       std::shared_ptr<Node> node_ptr = dq.front();
       n_id_map->insert({node_ptr->id(), node_ptr});
-      (*n_type_map)[node_ptr->type()].push_back(node_ptr->id());
+      graph_impl_->node_type_map_[node_ptr->type()].push_back(node_ptr->id());
       dq.pop_front();
     }
   }
@@ -63,15 +64,15 @@ Status GraphLoader::GetNodesAndEdges(NodeIdMap *n_id_map, EdgeIdMap *e_id_map, N
       RETURN_IF_NOT_OK(edge_ptr->SetNode({src_itr->second, dst_itr->second}));
       RETURN_IF_NOT_OK(src_itr->second->AddNeighbor(dst_itr->second));
       e_id_map->insert({edge_ptr->id(), edge_ptr});  // add edge to edge_id_map_
-      (*e_type_map)[edge_ptr->type()].push_back(edge_ptr->id());
+      graph_impl_->edge_type_map_[edge_ptr->type()].push_back(edge_ptr->id());
       dq.pop_front();
     }
   }
 
-  for (auto &itr : *n_type_map) itr.second.shrink_to_fit();
+  for (auto &itr : graph_impl_->node_type_map_) itr.second.shrink_to_fit();
-  for (auto &itr : *e_type_map) itr.second.shrink_to_fit();
+  for (auto &itr : graph_impl_->edge_type_map_) itr.second.shrink_to_fit();
 
-  MergeFeatureMaps(n_feature_map, e_feature_map, default_node_feature_map, default_edge_feature_map);
+  MergeFeatureMaps();
   return Status::OK();
 }
 
@@ -92,13 +93,26 @@ Status GraphLoader::InitAndLoad() {
   CHECK_FAIL_RETURN_UNEXPECTED(shard_reader_->GetShardHeader()->GetSchemaCount() > 0, "No schema found!");
   CHECK_FAIL_RETURN_UNEXPECTED(shard_reader_->Launch(true) == MSRStatus::SUCCESS, "fail to launch mr");
 
-  mindrecord::json schema = (shard_reader_->GetShardHeader()->GetSchemas()[0]->GetSchema())["schema"];
+  graph_impl_->data_schema_ = (shard_reader_->GetShardHeader()->GetSchemas()[0]->GetSchema());
+  mindrecord::json schema = graph_impl_->data_schema_["schema"];
   for (const std::string &key : keys_) {
     if (schema.find(key) == schema.end()) {
       RETURN_STATUS_UNEXPECTED(key + ":doesn't exist in schema:" + schema.dump());
     }
   }
 
+  if (graph_impl_->server_mode_) {
+#if !defined(_WIN32) && !defined(_WIN64)
+    int64_t total_blob_size = 0;
+    CHECK_FAIL_RETURN_UNEXPECTED(shard_reader_->GetTotalBlobSize(&total_blob_size) == MSRStatus::SUCCESS,
+                                 "failed to get total blob size");
+    graph_impl_->graph_shared_memory_ = std::make_unique<GraphSharedMemory>(total_blob_size, mr_path_);
+    RETURN_IF_NOT_OK(graph_impl_->graph_shared_memory_->CreateSharedMemory());
+#endif
+  }
+
+  graph_feature_parser_ = std::make_unique<GraphFeatureParser>(*shard_reader_->GetShardColumn());
+
   // launching worker threads
   for (int wkr_id = 0; wkr_id < num_workers_; ++wkr_id) {
     RETURN_IF_NOT_OK(vg.CreateAsyncTask("GraphLoader", std::bind(&GraphLoader::WorkerEntry, this, wkr_id)));
@@ -116,18 +130,39 @@ Status GraphLoader::LoadNode(const std::vector<uint8_t> &col_blob, const mindrec
   NodeType node_type = static_cast<NodeType>(col_jsn["type"]);
   (*node) = std::make_shared<LocalNode>(node_id, node_type);
   std::vector<int32_t> indices;
-  RETURN_IF_NOT_OK(LoadFeatureIndex("node_feature_index", col_blob, col_jsn, &indices));
+  RETURN_IF_NOT_OK(graph_feature_parser_->LoadFeatureIndex("node_feature_index", col_blob, &indices));
-
+  if (graph_impl_->server_mode_) {
-  for (int32_t ind : indices) {
+#if !defined(_WIN32) && !defined(_WIN64)
-    std::shared_ptr<Tensor> tensor;
+    for (int32_t ind : indices) {
-    RETURN_IF_NOT_OK(LoadFeatureTensor("node_feature_" + std::to_string(ind), col_blob, col_jsn, &tensor));
+      std::shared_ptr<Tensor> tensor_sm;
-    RETURN_IF_NOT_OK((*node)->UpdateFeature(std::make_shared<Feature>(ind, tensor)));
+      RETURN_IF_NOT_OK(graph_feature_parser_->LoadFeatureToSharedMemory(
-    (*feature_map)[node_type].insert(ind);
+        "node_feature_" + std::to_string(ind), col_blob, graph_impl_->graph_shared_memory_.get(), &tensor_sm));
-    if ((*default_feature)[ind] == nullptr) {
+      RETURN_IF_NOT_OK((*node)->UpdateFeature(std::make_shared<Feature>(ind, tensor_sm, true)));
-      std::shared_ptr<Tensor> zero_tensor;
+      (*feature_map)[node_type].insert(ind);
-      RETURN_IF_NOT_OK(Tensor::CreateEmpty(tensor->shape(), tensor->type(), &zero_tensor));
+      if ((*default_feature)[ind] == nullptr) {
-      RETURN_IF_NOT_OK(zero_tensor->Zero());
+        std::shared_ptr<Tensor> tensor;
-      (*default_feature)[ind] = std::make_shared<Feature>(ind, zero_tensor);
+        RETURN_IF_NOT_OK(
+          graph_feature_parser_->LoadFeatureTensor("node_feature_" + std::to_string(ind), col_blob, &tensor));
+        std::shared_ptr<Tensor> zero_tensor;
+        RETURN_IF_NOT_OK(Tensor::CreateEmpty(tensor->shape(), tensor->type(), &zero_tensor));
+        RETURN_IF_NOT_OK(zero_tensor->Zero());
+        (*default_feature)[ind] = std::make_shared<Feature>(ind, zero_tensor);
+      }
+    }
+#endif
+  } else {
+    for (int32_t ind : indices) {
+      std::shared_ptr<Tensor> tensor;
+      RETURN_IF_NOT_OK(
+        graph_feature_parser_->LoadFeatureTensor("node_feature_" + std::to_string(ind), col_blob, &tensor));
+      RETURN_IF_NOT_OK((*node)->UpdateFeature(std::make_shared<Feature>(ind, tensor)));
+      (*feature_map)[node_type].insert(ind);
+      if ((*default_feature)[ind] == nullptr) {
+        std::shared_ptr<Tensor> zero_tensor;
+        RETURN_IF_NOT_OK(Tensor::CreateEmpty(tensor->shape(), tensor->type(), &zero_tensor));
+        RETURN_IF_NOT_OK(zero_tensor->Zero());
+        (*default_feature)[ind] = std::make_shared<Feature>(ind, zero_tensor);
+      }
     }
   }
   return Status::OK();
@@ -143,63 +178,42 @@ Status GraphLoader::LoadEdge(const std::vector<uint8_t> &col_blob, const mindrec
   std::shared_ptr<Node> dst = std::make_shared<LocalNode>(dst_id, -1);
   (*edge) = std::make_shared<LocalEdge>(edge_id, edge_type, src, dst);
   std::vector<int32_t> indices;
-  RETURN_IF_NOT_OK(LoadFeatureIndex("edge_feature_index", col_blob, col_jsn, &indices));
+  RETURN_IF_NOT_OK(graph_feature_parser_->LoadFeatureIndex("edge_feature_index", col_blob, &indices));
-  for (int32_t ind : indices) {
+  if (graph_impl_->server_mode_) {
-    std::shared_ptr<Tensor> tensor;
+#if !defined(_WIN32) && !defined(_WIN64)
-    RETURN_IF_NOT_OK(LoadFeatureTensor("edge_feature_" + std::to_string(ind), col_blob, col_jsn, &tensor));
+    for (int32_t ind : indices) {
-    RETURN_IF_NOT_OK((*edge)->UpdateFeature(std::make_shared<Feature>(ind, tensor)));
+      std::shared_ptr<Tensor> tensor_sm;
-    (*feature_map)[edge_type].insert(ind);
+      RETURN_IF_NOT_OK(graph_feature_parser_->LoadFeatureToSharedMemory(
-    if ((*default_feature)[ind] == nullptr) {
+        "edge_feature_" + std::to_string(ind), col_blob, graph_impl_->graph_shared_memory_.get(), &tensor_sm));
-      std::shared_ptr<Tensor> zero_tensor;
+      RETURN_IF_NOT_OK((*edge)->UpdateFeature(std::make_shared<Feature>(ind, tensor_sm, true)));
-      RETURN_IF_NOT_OK(Tensor::CreateEmpty(tensor->shape(), tensor->type(), &zero_tensor));
+      (*feature_map)[edge_type].insert(ind);
-      RETURN_IF_NOT_OK(zero_tensor->Zero());
+      if ((*default_feature)[ind] == nullptr) {
-      (*default_feature)[ind] = std::make_shared<Feature>(ind, zero_tensor);
+        std::shared_ptr<Tensor> tensor;
+        RETURN_IF_NOT_OK(
+          graph_feature_parser_->LoadFeatureTensor("edge_feature_" + std::to_string(ind), col_blob, &tensor));
+        std::shared_ptr<Tensor> zero_tensor;
+        RETURN_IF_NOT_OK(Tensor::CreateEmpty(tensor->shape(), tensor->type(), &zero_tensor));
+        RETURN_IF_NOT_OK(zero_tensor->Zero());
+        (*default_feature)[ind] = std::make_shared<Feature>(ind, zero_tensor);
+      }
+    }
+#endif
+  } else {
+    for (int32_t ind : indices) {
+      std::shared_ptr<Tensor> tensor;
+      RETURN_IF_NOT_OK(
+        graph_feature_parser_->LoadFeatureTensor("edge_feature_" + std::to_string(ind), col_blob, &tensor));
+      RETURN_IF_NOT_OK((*edge)->UpdateFeature(std::make_shared<Feature>(ind, tensor)));
+      (*feature_map)[edge_type].insert(ind);
+      if ((*default_feature)[ind] == nullptr) {
+        std::shared_ptr<Tensor> zero_tensor;
+        RETURN_IF_NOT_OK(Tensor::CreateEmpty(tensor->shape(), tensor->type(), &zero_tensor));
+        RETURN_IF_NOT_OK(zero_tensor->Zero());
+        (*default_feature)[ind] = std::make_shared<Feature>(ind, zero_tensor);
+      }
     }
   }
-  return Status::OK();
-}
 
-Status GraphLoader::LoadFeatureTensor(const std::string &key, const std::vector<uint8_t> &col_blob,
-                                      const mindrecord::json &col_jsn, std::shared_ptr<Tensor> *tensor) {
-  const unsigned char *data = nullptr;
-  std::unique_ptr<unsigned char[]> data_ptr;
-  uint64_t n_bytes = 0, col_type_size = 1;
-  mindrecord::ColumnDataType col_type = mindrecord::ColumnNoDataType;
-  std::vector<int64_t> column_shape;
-  MSRStatus rs = shard_reader_->GetShardColumn()->GetColumnValueByName(
-    key, col_blob, col_jsn, &data, &data_ptr, &n_bytes, &col_type, &col_type_size, &column_shape);
-  CHECK_FAIL_RETURN_UNEXPECTED(rs == mindrecord::SUCCESS, "fail to load column" + key);
-  if (data == nullptr) data = reinterpret_cast<const unsigned char *>(&data_ptr[0]);
-  RETURN_IF_NOT_OK(Tensor::CreateFromMemory(std::move(TensorShape({static_cast<dsize_t>(n_bytes / col_type_size)})),
-                                            std::move(DataType(mindrecord::ColumnDataTypeNameNormalized[col_type])),
-                                            data, tensor));
-  return Status::OK();
-}
-
-Status GraphLoader::LoadFeatureIndex(const std::string &key, const std::vector<uint8_t> &col_blob,
-                                     const mindrecord::json &col_jsn, std::vector<int32_t> *indices) {
-  const unsigned char *data = nullptr;
-  std::unique_ptr<unsigned char[]> data_ptr;
-  uint64_t n_bytes = 0, col_type_size = 1;
-  mindrecord::ColumnDataType col_type = mindrecord::ColumnNoDataType;
-  std::vector<int64_t> column_shape;
-  MSRStatus rs = shard_reader_->GetShardColumn()->GetColumnValueByName(
-    key, col_blob, col_jsn, &data, &data_ptr, &n_bytes, &col_type, &col_type_size, &column_shape);
-  CHECK_FAIL_RETURN_UNEXPECTED(rs == mindrecord::SUCCESS, "fail to load column:" + key);
-
-  if (data == nullptr) data = reinterpret_cast<const unsigned char *>(&data_ptr[0]);
-
-  for (int i = 0; i < n_bytes; i += col_type_size) {
-    int32_t feature_ind = -1;
-    if (col_type == mindrecord::ColumnInt32) {
-      feature_ind = *(reinterpret_cast<const int32_t *>(data + i));
-    } else if (col_type == mindrecord::ColumnInt64) {
-      feature_ind = *(reinterpret_cast<const int64_t *>(data + i));
-    } else {
-      RETURN_STATUS_UNEXPECTED("Feature Index needs to be int32/int64 type!");
-    }
-    if (feature_ind >= 0) indices->push_back(feature_ind);
-  }
   return Status::OK();
 }
 
@@ -234,21 +248,19 @@ Status GraphLoader::WorkerEntry(int32_t worker_id) {
   return Status::OK();
 }
 
-void GraphLoader::MergeFeatureMaps(NodeFeatureMap *n_feature_map, EdgeFeatureMap *e_feature_map,
+void GraphLoader::MergeFeatureMaps() {
-                                   DefaultNodeFeatureMap *default_node_feature_map,
-                                   DefaultEdgeFeatureMap *default_edge_feature_map) {
   for (int wkr_id = 0; wkr_id < num_workers_; wkr_id++) {
     for (auto &m : n_feature_maps_[wkr_id]) {
-      for (auto &n : m.second) (*n_feature_map)[m.first].insert(n);
+      for (auto &n : m.second) graph_impl_->node_feature_map_[m.first].insert(n);
     }
     for (auto &m : e_feature_maps_[wkr_id]) {
-      for (auto &n : m.second) (*e_feature_map)[m.first].insert(n);
+      for (auto &n : m.second) graph_impl_->edge_feature_map_[m.first].insert(n);
     }
     for (auto &m : default_node_feature_maps_[wkr_id]) {
-      (*default_node_feature_map)[m.first] = m.second;
+      graph_impl_->default_node_feature_map_[m.first] = m.second;
     }
     for (auto &m : default_edge_feature_maps_[wkr_id]) {
-      (*default_edge_feature_map)[m.first] = m.second;
+      graph_impl_->default_edge_feature_map_[m.first] = m.second;
     }
   }
   n_feature_maps_.clear();

mindspore/ccsrc/minddata/dataset/engine/gnn/graph_loader.h

@@ -26,10 +26,13 @@
 
 #include "minddata/dataset/core/data_type.h"
 #include "minddata/dataset/core/tensor.h"
-#include "minddata/dataset/engine/gnn/feature.h"
-#include "minddata/dataset/engine/gnn/graph.h"
-#include "minddata/dataset/engine/gnn/node.h"
 #include "minddata/dataset/engine/gnn/edge.h"
+#include "minddata/dataset/engine/gnn/feature.h"
+#include "minddata/dataset/engine/gnn/graph_feature_parser.h"
+#if !defined(_WIN32) && !defined(_WIN64)
+#include "minddata/dataset/engine/gnn/graph_shared_memory.h"
+#endif
+#include "minddata/dataset/engine/gnn/node.h"
 #include "minddata/dataset/util/status.h"
 #include "minddata/mindrecord/include/shard_reader.h"
 namespace mindspore {
@@ -46,13 +49,15 @@ using EdgeFeatureMap = std::unordered_map<EdgeType, std::unordered_set<FeatureTy
 using DefaultNodeFeatureMap = std::unordered_map<FeatureType, std::shared_ptr<Feature>>;
 using DefaultEdgeFeatureMap = std::unordered_map<FeatureType, std::shared_ptr<Feature>>;
 
+class GraphDataImpl;
+
 // this class interfaces with the underlying storage format (mindrecord)
 // it returns raw nodes and edges via GetNodesAndEdges
 // it is then the responsibility of graph to construct itself based on the nodes and edges
 // if needed, this class could become a base where each derived class handles a specific storage format
 class GraphLoader {
  public:
-  explicit GraphLoader(std::string mr_filepath, int32_t num_workers = 4);
+  GraphLoader(GraphDataImpl *graph_impl, std::string mr_filepath, int32_t num_workers = 4, bool server_mode = false);
 
   ~GraphLoader() = default;
   // Init mindrecord and load everything into memory multi-threaded
@@ -63,8 +68,7 @@ class GraphLoader {
   // nodes and edges are added to map without any connection. That's because there nodes and edges are read in
   // random order. src_node and dst_node in Edge are node_id only with -1 as type.
   // features attached to each node and edge are expected to be filled correctly
-  Status GetNodesAndEdges(NodeIdMap *, EdgeIdMap *, NodeTypeMap *, EdgeTypeMap *, NodeFeatureMap *, EdgeFeatureMap *,
+  Status GetNodesAndEdges();
-                          DefaultNodeFeatureMap *, DefaultEdgeFeatureMap *);
 
  private:
   //
@@ -92,29 +96,15 @@ class GraphLoader {
   Status LoadEdge(const std::vector<uint8_t> &blob, const mindrecord::json &jsn, std::shared_ptr<Edge> *edge,
                   EdgeFeatureMap *feature_map, DefaultEdgeFeatureMap *default_feature);
 
-  // @param std::string key - column name
-  // @param std::vector<uint8_t> &blob - contains data in blob field in mindrecord
-  // @param mindrecord::json &jsn - contains raw data
-  // @param std::vector<int32_t> *ind - return value, list of feature index in int32_t
-  // @return Status - the status code
-  Status LoadFeatureIndex(const std::string &key, const std::vector<uint8_t> &blob, const mindrecord::json &jsn,
-                          std::vector<int32_t> *ind);
-
-  // @param std::string &key - column name
-  // @param std::vector<uint8_t> &blob - contains data in blob field in mindrecord
-  // @param mindrecord::json &jsn - contains raw data
-  // @param std::shared_ptr<Tensor> *tensor - return value feature tensor
-  // @return Status - the status code
-  Status LoadFeatureTensor(const std::string &key, const std::vector<uint8_t> &blob, const mindrecord::json &jsn,
-                           std::shared_ptr<Tensor> *tensor);
-
   // merge NodeFeatureMap and EdgeFeatureMap of each worker into 1
-  void MergeFeatureMaps(NodeFeatureMap *, EdgeFeatureMap *, DefaultNodeFeatureMap *, DefaultEdgeFeatureMap *);
+  void MergeFeatureMaps();
 
+  GraphDataImpl *graph_impl_;
+  std::string mr_path_;
   const int32_t num_workers_;
   std::atomic_int row_id_;
-  std::string mr_path_;
   std::unique_ptr<ShardReader> shard_reader_;
+  std::unique_ptr<GraphFeatureParser> graph_feature_parser_;
   std::vector<std::deque<std::shared_ptr<Node>>> n_deques_;
   std::vector<std::deque<std::shared_ptr<Edge>>> e_deques_;
   std::vector<NodeFeatureMap> n_feature_maps_;

mindspore/ccsrc/minddata/dataset/engine/gnn/graph_shared_memory.cc

@@ -0,0 +1,134 @@
+/**
+ * Copyright 2020 Huawei Technologies Co., Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "minddata/dataset/engine/gnn/graph_shared_memory.h"
+
+#include <string>
+
+#include "utils/log_adapter.h"
+
+namespace mindspore {
+namespace dataset {
+namespace gnn {
+
+GraphSharedMemory::GraphSharedMemory(int64_t memory_size, key_t memory_key)
+    : memory_size_(memory_size),
+      memory_key_(memory_key),
+      memory_ptr_(nullptr),
+      memory_offset_(0),
+      is_new_create_(false) {
+  std::stringstream stream;
+  stream << std::hex << memory_key_;
+  memory_key_str_ = stream.str();
+}
+
+GraphSharedMemory::GraphSharedMemory(int64_t memory_size, const std::string &mr_file)
+    : mr_file_(mr_file),
+      memory_size_(memory_size),
+      memory_key_(-1),
+      memory_ptr_(nullptr),
+      memory_offset_(0),
+      is_new_create_(false) {}
+
+GraphSharedMemory::~GraphSharedMemory() {
+  if (is_new_create_) {
+    (void)DeleteSharedMemory();
+  }
+}
+
+Status GraphSharedMemory::CreateSharedMemory() {
+  if (memory_key_ == -1) {
+    // ftok to generate unique key
+    memory_key_ = ftok(mr_file_.data(), kGnnSharedMemoryId);
+    CHECK_FAIL_RETURN_UNEXPECTED(memory_key_ != -1, "Failed to get key of shared memory. file_name:" + mr_file_);
+    std::stringstream stream;
+    stream << std::hex << memory_key_;
+    memory_key_str_ = stream.str();
+  }
+  int shmflg = (0666 | IPC_CREAT | IPC_EXCL);
+  Status s = SharedMemoryImpl(shmflg);
+  if (s.IsOk()) {
+    is_new_create_ = true;
+    MS_LOG(INFO) << "Create shared memory success, key=0x" << memory_key_str_;
+  } else {
+    MS_LOG(WARNING) << "Shared memory with the same key may already exist, key=0x" << memory_key_str_;
+    shmflg = (0666 | IPC_CREAT);
+    s = SharedMemoryImpl(shmflg);
+    if (!s.IsOk()) {
+      RETURN_STATUS_UNEXPECTED("Create shared memory fao;ed, key=0x" + memory_key_str_);
+    }
+  }
+  return Status::OK();
+}
+
+Status GraphSharedMemory::GetSharedMemory() {
+  int shmflg = 0;
+  RETURN_IF_NOT_OK(SharedMemoryImpl(shmflg));
+  return Status::OK();
+}
+
+Status GraphSharedMemory::DeleteSharedMemory() {
+  int shmid = shmget(memory_key_, 0, 0);
+  CHECK_FAIL_RETURN_UNEXPECTED(shmid != -1, "Failed to get shared memory. key=0x" + memory_key_str_);
+  int result = shmctl(shmid, IPC_RMID, 0);
+  CHECK_FAIL_RETURN_UNEXPECTED(result != -1, "Failed to delete shared memory. key=0x" + memory_key_str_);
+  return Status::OK();
+}
+
+Status GraphSharedMemory::SharedMemoryImpl(const int &shmflg) {
+  // shmget returns an identifier in shmid
+  int shmid = shmget(memory_key_, memory_size_, shmflg);
+  CHECK_FAIL_RETURN_UNEXPECTED(shmid != -1, "Failed to get shared memory. key=0x" + memory_key_str_);
+
+  // shmat to attach to shared memory
+  auto data = shmat(shmid, reinterpret_cast<void *>(0), 0);
+  CHECK_FAIL_RETURN_UNEXPECTED(data != (char *)(-1), "Failed to address shared memory. key=0x" + memory_key_str_);
+  memory_ptr_ = reinterpret_cast<uint8_t *>(data);
+
+  return Status::OK();
+}
+
+Status GraphSharedMemory::InsertData(const uint8_t *data, int64_t len, int64_t *offset) {
+  CHECK_FAIL_RETURN_UNEXPECTED(data, "Input data is nullptr.");
+  CHECK_FAIL_RETURN_UNEXPECTED(len > 0, "Input len is invalid.");
+
+  std::lock_guard<std::mutex> lck(mutex_);
+  CHECK_FAIL_RETURN_UNEXPECTED((memory_size_ - memory_offset_ >= len),
+                               "Insufficient shared memory space to insert data.");
+  if (EOK != memcpy_s(memory_ptr_ + memory_offset_, memory_size_ - memory_offset_, data, len)) {
+    RETURN_STATUS_UNEXPECTED("Failed to insert data into shared memory.");
+  }
+  *offset = memory_offset_;
+  memory_offset_ += len;
+  return Status::OK();
+}
+
+Status GraphSharedMemory::GetData(uint8_t *data, int64_t data_len, int64_t offset, int64_t get_data_len) {
+  CHECK_FAIL_RETURN_UNEXPECTED(data, "Input data is nullptr.");
+  CHECK_FAIL_RETURN_UNEXPECTED(get_data_len > 0, "Input get_data_len is invalid.");
+  CHECK_FAIL_RETURN_UNEXPECTED(data_len >= get_data_len, "Insufficient target address space.");
+
+  CHECK_FAIL_RETURN_UNEXPECTED(memory_size_ >= get_data_len + offset,
+                               "get_data_len is too large, beyond the space of shared memory.");
+  if (EOK != memcpy_s(data, data_len, memory_ptr_ + offset, get_data_len)) {
+    RETURN_STATUS_UNEXPECTED("Failed to insert data into shared memory.");
+  }
+  return Status::OK();
+}
+
+}  // namespace gnn
+}  // namespace dataset
+}  // namespace mindspore

mindspore/ccsrc/minddata/dataset/engine/gnn/graph_shared_memory.h

@@ -0,0 +1,72 @@
+/**
+ * Copyright 2020 Huawei Technologies Co., Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#ifndef MINDSPORE_CCSRC_MINDDATA_DATASET_ENGINE_GNN_GRAPH_SHARED_MEMORY_H_
+#define MINDSPORE_CCSRC_MINDDATA_DATASET_ENGINE_GNN_GRAPH_SHARED_MEMORY_H_
+
+#include <sys/ipc.h>
+#include <sys/shm.h>
+#include <mutex>
+#include <string>
+
+#include "minddata/dataset/util/status.h"
+
+namespace mindspore {
+namespace dataset {
+namespace gnn {
+
+const int kGnnSharedMemoryId = 65;
+
+class GraphSharedMemory {
+ public:
+  explicit GraphSharedMemory(int64_t memory_size, key_t memory_key);
+  explicit GraphSharedMemory(int64_t memory_size, const std::string &mr_file);
+
+  ~GraphSharedMemory();
+
+  // @param uint8_t** shared_memory - shared memory address
+  // @return Status - the status code
+  Status CreateSharedMemory();
+
+  // @param uint8_t** shared_memory - shared memory address
+  // @return Status - the status code
+  Status GetSharedMemory();
+
+  Status DeleteSharedMemory();
+
+  Status InsertData(const uint8_t *data, int64_t len, int64_t *offset);
+
+  Status GetData(uint8_t *data, int64_t data_len, int64_t offset, int64_t get_data_len);
+
+  key_t memory_key() { return memory_key_; }
+
+  int64_t memory_size() { return memory_size_; }
+
+ private:
+  Status SharedMemoryImpl(const int &shmflg);
+
+  std::string mr_file_;
+  int64_t memory_size_;
+  key_t memory_key_;
+  std::string memory_key_str_;
+  uint8_t *memory_ptr_;
+  int64_t memory_offset_;
+  std::mutex mutex_;
+  bool is_new_create_;
+};
+}  // namespace gnn
+}  // namespace dataset
+}  // namespace mindspore
+#endif  // MINDSPORE_CCSRC_MINDDATA_DATASET_ENGINE_GNN_GRAPH_SHARED_MEMORY_H_

mindspore/ccsrc/minddata/dataset/engine/gnn/grpc_async_server.cc

@@ -0,0 +1,82 @@
+/**
+ * Copyright 2020 Huawei Technologies Co., Ltd
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+*/
+#include "minddata/dataset/engine/gnn/grpc_async_server.h"
+
+#include <limits>
+
+#include "minddata/dataset/util/task_manager.h"
+#include "utils/log_adapter.h"
+
+namespace mindspore {
+namespace dataset {
+
+GrpcAsyncServer::GrpcAsyncServer(const std::string &host, int32_t port) : host_(host), port_(port) {}
+
+GrpcAsyncServer::~GrpcAsyncServer() { Stop(); }
+
+Status GrpcAsyncServer::Run() {
+  std::string server_address = host_ + ":" + std::to_string(port_);
+  grpc::ServerBuilder builder;
+  // Default message size for gRPC is 4MB. Increase it to 2g-1
+  builder.SetMaxReceiveMessageSize(std::numeric_limits<int32_t>::max());
+  builder.AddChannelArgument(GRPC_ARG_ALLOW_REUSEPORT, 0);
+  int port_tcpip = 0;
+  builder.AddListeningPort(server_address, grpc::InsecureServerCredentials(), &port_tcpip);
+  RETURN_IF_NOT_OK(RegisterService(&builder));
+  cq_ = builder.AddCompletionQueue();
+  server_ = builder.BuildAndStart();
+  if (server_) {
+    MS_LOG(INFO) << "Server listening on " << server_address;
+  } else {
+    std::string errMsg = "Fail to start server. ";
+    if (port_tcpip != port_) {
+      errMsg += "Unable to bind to address " + server_address + ".";
+    }
+    RETURN_STATUS_UNEXPECTED(errMsg);
+  }
+  return Status::OK();
+}
+
+Status GrpcAsyncServer::HandleRequest() {
+  bool success;
+  void *tag;
+  // We loop through the grpc queue. Each connection if successful
+  // will come back with our own tag which is an instance of CallData
+  // and we simply call its functor. But first we need to create these instances
+  // and inject them into the grpc queue.
+  RETURN_IF_NOT_OK(EnqueueRequest());
+  while (cq_->Next(&tag, &success)) {
+    RETURN_IF_INTERRUPTED();
+    if (success) {
+      RETURN_IF_NOT_OK(ProcessRequest(tag));
+    } else {
+      MS_LOG(DEBUG) << "cq_->Next failed.";
+    }
+  }
+  return Status::OK();
+}
+
+void GrpcAsyncServer::Stop() {
+  if (server_) {
+    server_->Shutdown();
+  }
+  // Always shutdown the completion queue after the server.
+  if (cq_) {
+    cq_->Shutdown();
+  }
+}
+}  // namespace dataset
+}  // namespace mindspore

mindspore/ccsrc/minddata/dataset/engine/gnn/grpc_async_server.h

@@ -0,0 +1,59 @@
+/**
+ * Copyright 2020 Huawei Technologies Co., Ltd
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+*/
+#ifndef MINDSPORE_CCSRC_MINDDATA_DATASET_ENGINE_GNN_GRPC_ASYNC_SERVER_H_
+#define MINDSPORE_CCSRC_MINDDATA_DATASET_ENGINE_GNN_GRPC_ASYNC_SERVER_H_
+
+#include <memory>
+#include <string>
+#include <utility>
+#include <vector>
+
+#include "grpcpp/grpcpp.h"
+#include "grpcpp/impl/codegen/async_unary_call.h"
+
+#include "minddata/dataset/util/status.h"
+
+namespace mindspore {
+namespace dataset {
+
+/// \brief Async server base class
+class GrpcAsyncServer {
+ public:
+  explicit GrpcAsyncServer(const std::string &host, int32_t port);
+  virtual ~GrpcAsyncServer();
+  /// \brief Brings up gRPC server
+  /// \return none
+  Status Run();
+  /// \brief Entry function to handle async server request
+  Status HandleRequest();
+
+  void Stop();
+
+  virtual Status RegisterService(grpc::ServerBuilder *builder) = 0;
+
+  virtual Status EnqueueRequest() = 0;
+
+  virtual Status ProcessRequest(void *tag) = 0;
+
+ protected:
+  int32_t port_;
+  std::string host_;
+  std::unique_ptr<grpc::ServerCompletionQueue> cq_;
+  std::unique_ptr<grpc::Server> server_;
+};
+}  // namespace dataset
+}  // namespace mindspore
+#endif  // MINDSPORE_CCSRC_MINDDATA_DATASET_ENGINE_GNN_GRPC_ASYNC_SERVER_H_

mindspore/ccsrc/minddata/dataset/engine/gnn/local_edge.cc

@@ -44,6 +44,7 @@ Status LocalEdge::UpdateFeature(const std::shared_ptr<Feature> &feature) {
     return Status::OK();
   }
 }
+
 }  // namespace gnn
 }  // namespace dataset
 }  // namespace mindspore

mindspore/ccsrc/minddata/dataset/engine/gnn/local_edge.h

@@ -20,10 +20,10 @@
 #include <unordered_map>
 #include <utility>
 
-#include "minddata/dataset/util/status.h"
 #include "minddata/dataset/engine/gnn/edge.h"
 #include "minddata/dataset/engine/gnn/feature.h"
 #include "minddata/dataset/engine/gnn/node.h"
+#include "minddata/dataset/util/status.h"
 
 namespace mindspore {
 namespace dataset {

mindspore/ccsrc/minddata/dataset/engine/gnn/local_node.h

@@ -20,9 +20,9 @@
 #include <unordered_map>
 #include <vector>
 
-#include "minddata/dataset/util/status.h"
 #include "minddata/dataset/engine/gnn/node.h"
 #include "minddata/dataset/engine/gnn/feature.h"
+#include "minddata/dataset/util/status.h"
 
 namespace mindspore {
 namespace dataset {

mindspore/ccsrc/minddata/dataset/engine/gnn/node.h

@@ -20,8 +20,8 @@
 #include <unordered_map>
 #include <vector>
 
-#include "minddata/dataset/util/status.h"
 #include "minddata/dataset/engine/gnn/feature.h"
+#include "minddata/dataset/util/status.h"
 
 namespace mindspore {
 namespace dataset {

mindspore/ccsrc/minddata/dataset/engine/gnn/tensor_proto.cc

@@ -0,0 +1,84 @@
+/**
+ * Copyright 2020 Huawei Technologies Co., Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#include "minddata/dataset/engine/gnn/tensor_proto.h"
+
+#include <algorithm>
+#include <utility>
+#include <unordered_map>
+
+namespace mindspore {
+namespace dataset {
+
+const std::unordered_map<DataTypePb, DataType::Type> g_pb2datatype_map{
+  {DataTypePb::DE_PB_UNKNOWN, DataType::DE_UNKNOWN}, {DataTypePb::DE_PB_BOOL, DataType::DE_BOOL},
+  {DataTypePb::DE_PB_INT8, DataType::DE_INT8},       {DataTypePb::DE_PB_UINT8, DataType::DE_UINT8},
+  {DataTypePb::DE_PB_INT16, DataType::DE_INT16},     {DataTypePb::DE_PB_UINT16, DataType::DE_UINT16},
+  {DataTypePb::DE_PB_INT32, DataType::DE_INT32},     {DataTypePb::DE_PB_UINT32, DataType::DE_UINT32},
+  {DataTypePb::DE_PB_INT64, DataType::DE_INT64},     {DataTypePb::DE_PB_UINT64, DataType::DE_UINT64},
+  {DataTypePb::DE_PB_FLOAT16, DataType::DE_FLOAT16}, {DataTypePb::DE_PB_FLOAT32, DataType::DE_FLOAT32},
+  {DataTypePb::DE_PB_FLOAT64, DataType::DE_FLOAT64}, {DataTypePb::DE_PB_STRING, DataType::DE_STRING},
+};
+
+const std::unordered_map<DataType::Type, DataTypePb> g_datatype2pb_map{
+  {DataType::DE_UNKNOWN, DataTypePb::DE_PB_UNKNOWN}, {DataType::DE_BOOL, DataTypePb::DE_PB_BOOL},
+  {DataType::DE_INT8, DataTypePb::DE_PB_INT8},       {DataType::DE_UINT8, DataTypePb::DE_PB_UINT8},
+  {DataType::DE_INT16, DataTypePb::DE_PB_INT16},     {DataType::DE_UINT16, DataTypePb::DE_PB_UINT16},
+  {DataType::DE_INT32, DataTypePb::DE_PB_INT32},     {DataType::DE_UINT32, DataTypePb::DE_PB_UINT32},
+  {DataType::DE_INT64, DataTypePb::DE_PB_INT64},     {DataType::DE_UINT64, DataTypePb::DE_PB_UINT64},
+  {DataType::DE_FLOAT16, DataTypePb::DE_PB_FLOAT16}, {DataType::DE_FLOAT32, DataTypePb::DE_PB_FLOAT32},
+  {DataType::DE_FLOAT64, DataTypePb::DE_PB_FLOAT64}, {DataType::DE_STRING, DataTypePb::DE_PB_STRING},
+};
+
+Status TensorToPb(const std::shared_ptr<Tensor> tensor, TensorPb *tensor_pb) {
+  CHECK_FAIL_RETURN_UNEXPECTED(tensor, "Parameter tensor is a null pointer");
+  CHECK_FAIL_RETURN_UNEXPECTED(tensor_pb, "Parameter tensor_pb is a null pointer");
+
+  std::vector<dsize_t> shape = tensor->shape().AsVector();
+  for (auto dim : shape) {
+    tensor_pb->add_dims(static_cast<google::protobuf::int64>(dim));
+  }
+  auto iter = g_datatype2pb_map.find(tensor->type().value());
+  if (iter == g_datatype2pb_map.end()) {
+    RETURN_STATUS_UNEXPECTED("Invalid tensor type: " + tensor->type().ToString());
+  }
+  tensor_pb->set_tensor_type(iter->second);
+  tensor_pb->set_data(tensor->GetBuffer(), tensor->SizeInBytes());
+  return Status::OK();
+}
+
+Status PbToTensor(const TensorPb *tensor_pb, std::shared_ptr<Tensor> *tensor) {
+  CHECK_FAIL_RETURN_UNEXPECTED(tensor_pb, "Parameter tensor_pb is a null pointer");
+  CHECK_FAIL_RETURN_UNEXPECTED(tensor, "Parameter tensor is a null pointer");
+
+  std::vector<dsize_t> shape;
+  shape.resize(tensor_pb->dims().size());
+  std::transform(tensor_pb->dims().begin(), tensor_pb->dims().end(), shape.begin(),
+                 [](const google::protobuf::int64 dim) { return static_cast<dsize_t>(dim); });
+  auto iter = g_pb2datatype_map.find(tensor_pb->tensor_type());
+  if (iter == g_pb2datatype_map.end()) {
+    RETURN_STATUS_UNEXPECTED("Invalid Tensor_pb type: " + std::to_string(tensor_pb->tensor_type()));
+  }
+  DataType::Type type = iter->second;
+  std::shared_ptr<Tensor> tensor_out;
+  RETURN_IF_NOT_OK(Tensor::CreateFromMemory(TensorShape(shape), DataType(type),
+                                            reinterpret_cast<const unsigned char *>(tensor_pb->data().data()),
+                                            tensor_pb->data().size(), &tensor_out));
+  *tensor = std::move(tensor_out);
+  return Status::OK();
+}
+
+}  // namespace dataset
+}  // namespace mindspore

mindspore/ccsrc/minddata/dataset/engine/gnn/tensor_proto.h

@@ -0,0 +1,36 @@
+/**
+ * Copyright 2020 Huawei Technologies Co., Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef MINDSPORE_CCSRC_MINDDATA_DATASET_ENGINE_GNN_TENSOR_PROTO_H_
+#define MINDSPORE_CCSRC_MINDDATA_DATASET_ENGINE_GNN_TENSOR_PROTO_H_
+
+#include <deque>
+#include <memory>
+#include <vector>
+
+#include "proto/gnn_tensor.pb.h"
+#include "minddata/dataset/core/tensor.h"
+
+namespace mindspore {
+namespace dataset {
+
+Status TensorToPb(const std::shared_ptr<Tensor> tensor, TensorPb *tensor_pb);
+
+Status PbToTensor(const TensorPb *tensor_pb, std::shared_ptr<Tensor> *tensor);
+
+}  // namespace dataset
+}  // namespace mindspore
+#endif  // MINDSPORE_CCSRC_MINDDATA_DATASET_ENGINE_GNN_TENSOR_PROTO_H_

mindspore/ccsrc/minddata/mindrecord/include/shard_column.h

@@ -61,6 +61,7 @@ const std::unordered_map<std::string, ColumnDataType> ColumnDataTypeMap = {
 class ShardColumn {
  public:
   explicit ShardColumn(const std::shared_ptr<ShardHeader> &shard_header, bool compress_integer = true);
+  explicit ShardColumn(const json &schema_json, bool compress_integer = true);
 
   ~ShardColumn() = default;
 
@@ -72,23 +73,29 @@ class ShardColumn {
                                  std::vector<int64_t> *column_shape);
 
   /// \brief compress blob
-  std::vector<uint8_t> CompressBlob(const std::vector<uint8_t> &blob);
+  std::vector<uint8_t> CompressBlob(const std::vector<uint8_t> &blob, int64_t *compression_size);
 
   /// \brief check if blob compressed
   bool CheckCompressBlob() const { return has_compress_blob_; }
 
+  /// \brief getter
   uint64_t GetNumBlobColumn() const { return num_blob_column_; }
 
+  /// \brief getter
   std::vector<std::string> GetColumnName() { return column_name_; }
 
+  /// \brief getter
   std::vector<ColumnDataType> GeColumnDataType() { return column_data_type_; }
 
+  /// \brief getter
   std::vector<std::vector<int64_t>> GetColumnShape() { return column_shape_; }
 
   /// \brief get column value from blob
   MSRStatus GetColumnFromBlob(const std::string &column_name, const std::vector<uint8_t> &columns_blob,
                               const unsigned char **data, std::unique_ptr<unsigned char[]> *data_ptr,
                               uint64_t *const n_bytes);
+
+  /// \brief get column type
   std::pair<MSRStatus, ColumnCategory> GetColumnTypeByName(const std::string &column_name,
                                                            ColumnDataType *column_data_type,
                                                            uint64_t *column_data_type_size,
@@ -99,6 +106,9 @@ class ShardColumn {
                               std::unique_ptr<unsigned char[]> *data_ptr, uint64_t *n_bytes);
 
  private:
+  /// \brief intialization
+  void Init(const json &schema_json, bool compress_integer = true);
+
   /// \brief get float value from json
   template <typename T>
   MSRStatus GetFloat(std::unique_ptr<unsigned char[]> *data_ptr, const json &json_column_value, bool use_double);

mindspore/ccsrc/minddata/mindrecord/include/shard_header.h

@@ -65,6 +65,11 @@ class ShardHeader {
   /// \return the Statistic
   std::vector<std::shared_ptr<Statistics>> GetStatistics();
 
+  /// \brief add the statistic and save it
+  /// \param[in] statistic info of slim size
+  /// \return null
+  int64_t GetSlimSizeStatistic(const json &slim_size_json);
+
   /// \brief get the fields of the index
   /// \return the fields of the index
   std::vector<std::pair<uint64_t, std::string>> GetFields();
@@ -114,10 +119,14 @@ class ShardHeader {
 
   uint64_t GetPageSize() const { return page_size_; }
 
+  uint64_t GetCompressionSize() const { return compression_size_; }
+
   void SetHeaderSize(const uint64_t &header_size) { header_size_ = header_size; }
 
   void SetPageSize(const uint64_t &page_size) { page_size_ = page_size; }
 
+  void SetCompressionSize(const uint64_t &compression_size) { compression_size_ = compression_size; }
+
   std::vector<std::string> SerializeHeader();
 
   MSRStatus PagesToFile(const std::string dump_file_name);
@@ -177,6 +186,7 @@ class ShardHeader {
   uint32_t shard_count_;
   uint64_t header_size_;
   uint64_t page_size_;
+  uint64_t compression_size_;
 
   std::shared_ptr<Index> index_;
   std::vector<std::string> shard_addresses_;

mindspore/ccsrc/minddata/mindrecord/include/shard_reader.h

@@ -209,6 +209,9 @@ class ShardReader {
   /// \brief get all classes
   MSRStatus GetAllClasses(const std::string &category_field, std::set<std::string> &categories);
 
+  /// \brief get the size of blob data
+  MSRStatus GetTotalBlobSize(int64_t *total_blob_size);
+
  protected:
   /// \brief sqlite call back function
   static int SelectCallback(void *p_data, int num_fields, char **p_fields, char **p_col_names);
@@ -323,6 +326,7 @@ class ShardReader {
   const std::string kThreadName = "THRD_ITER_";  // prefix of thread name
   std::vector<std::thread> thread_set_;          // thread list
   int num_rows_;                                 // number of rows
+  int64_t total_blob_size_;                      // total size of blob data
   std::mutex mtx_delivery_;                      // locker for delivery
   std::condition_variable cv_delivery_;          // conditional variable for delivery
   std::condition_variable cv_iterator_;          // conditional variable for iterator

mindspore/ccsrc/minddata/mindrecord/include/shard_writer.h

@@ -257,6 +257,7 @@ class ShardWriter {
 
   std::mutex check_mutex_;  // mutex for data check
   std::atomic<bool> flag_{false};
+  std::atomic<int64_t> compression_size_;
 };
 }  // namespace mindrecord
 }  // namespace mindspore

mindspore/ccsrc/minddata/mindrecord/io/shard_reader.cc

@@ -43,6 +43,7 @@ ShardReader::ShardReader() {
   page_size_ = 0;
   header_size_ = 0;
   num_rows_ = 0;
+  total_blob_size_ = 0;
   num_padded_ = 0;
 }
 
@@ -55,9 +56,11 @@ std::pair<MSRStatus, std::vector<std::string>> ShardReader::GetMeta(const std::s
     return {FAILED, {}};
   }
   auto header = ret.second;
-  meta_data = {{"header_size", header["header_size"]}, {"page_size", header["page_size"]},
+  uint64_t compression_size = header.contains("compression_size") ? header["compression_size"].get<uint64_t>() : 0;
-               {"version", header["version"]},         {"index_fields", header["index_fields"]},
+  meta_data = {{"header_size", header["header_size"]},   {"page_size", header["page_size"]},
-               {"schema", header["schema"]},           {"blob_fields", header["blob_fields"]}};
+               {"compression_size", compression_size},   {"version", header["version"]},
+               {"index_fields", header["index_fields"]}, {"schema", header["schema"]},
+               {"blob_fields", header["blob_fields"]}};
   return {SUCCESS, header["shard_addresses"]};
 }
 
@@ -145,6 +148,11 @@ MSRStatus ShardReader::Init(const std::vector<std::string> &file_paths, bool loa
   for (const auto &rg : row_group_summary) {
     num_rows_ += std::get<3>(rg);
   }
+  auto disk_size = page_size_ * row_group_summary.size();
+  auto compression_size = shard_header_->GetCompressionSize();
+  total_blob_size_ = disk_size + compression_size;
+  MS_LOG(INFO) << "Blob data size, on disk: " << disk_size << " , addtional uncompression: " << compression_size
+               << " , Total: " << total_blob_size_;
 
   MS_LOG(INFO) << "Get meta from mindrecord file & index file successfully.";
 
@@ -272,6 +280,11 @@ std::vector<std::tuple<int, int, int, uint64_t>> ShardReader::ReadRowGroupSummar
   return row_group_summary;
 }
 
+MSRStatus ShardReader::GetTotalBlobSize(int64_t *total_blob_size) {
+  *total_blob_size = total_blob_size_;
+  return SUCCESS;
+}
+
 MSRStatus ShardReader::ConvertLabelToJson(const std::vector<std::vector<std::string>> &labels,
                                           std::shared_ptr<std::fstream> fs,
                                           std::vector<std::vector<std::vector<uint64_t>>> &offsets, int shard_id,

mindspore/ccsrc/minddata/mindrecord/io/shard_writer.cc

@@ -28,11 +28,9 @@ using mindspore::MsLogLevel::INFO;
 namespace mindspore {
 namespace mindrecord {
 ShardWriter::ShardWriter()
-    : shard_count_(1),
+    : shard_count_(1), header_size_(kDefaultHeaderSize), page_size_(kDefaultPageSize), row_count_(0), schema_count_(1) {
-      header_size_(kDefaultHeaderSize),
+  compression_size_ = 0;
-      page_size_(kDefaultPageSize),
+}
-      row_count_(0),
-      schema_count_(1) {}
 
 ShardWriter::~ShardWriter() {
   for (int i = static_cast<int>(file_streams_.size()) - 1; i >= 0; i--) {
@@ -201,6 +199,7 @@ MSRStatus ShardWriter::OpenForAppend(const std::string &path) {
   if (ret == FAILED) {
     return FAILED;
   }
+  compression_size_ = shard_header_->GetCompressionSize();
   ret = Open(real_addresses, true);
   if (ret == FAILED) {
     MS_LOG(ERROR) << "Open file failed";
@@ -614,7 +613,9 @@ MSRStatus ShardWriter::WriteRawDataPreCheck(std::map<uint64_t, std::vector<json>
   // compress blob
   if (shard_column_->CheckCompressBlob()) {
     for (auto &blob : blob_data) {
-      blob = shard_column_->CompressBlob(blob);
+      int64_t compression_bytes = 0;
+      blob = shard_column_->CompressBlob(blob, &compression_bytes);
+      compression_size_ += compression_bytes;
     }
   }
 
@@ -1177,6 +1178,11 @@ MSRStatus ShardWriter::WriteShardHeader() {
     MS_LOG(ERROR) << "Shard header is null";
     return FAILED;
   }
+
+  int64_t compression_temp = compression_size_;
+  uint64_t compression_size = compression_temp > 0 ? compression_temp : 0;
+  shard_header_->SetCompressionSize(compression_size);
+
   auto shard_header = shard_header_->SerializeHeader();
   // Write header data to multi files
   if (shard_count_ > static_cast<int>(file_streams_.size()) || shard_count_ > static_cast<int>(shard_header.size())) {

mindspore/ccsrc/minddata/mindrecord/meta/shard_column.cc

@@ -24,7 +24,15 @@ namespace mindspore {
 namespace mindrecord {
 ShardColumn::ShardColumn(const std::shared_ptr<ShardHeader> &shard_header, bool compress_integer) {
   auto first_schema = shard_header->GetSchemas()[0];
-  auto schema = first_schema->GetSchema()["schema"];
+  json schema_json = first_schema->GetSchema();
+  Init(schema_json, compress_integer);
+}
+
+ShardColumn::ShardColumn(const json &schema_json, bool compress_integer) { Init(schema_json, compress_integer); }
+
+void ShardColumn::Init(const json &schema_json, bool compress_integer) {
+  auto schema = schema_json["schema"];
+  auto blob_fields = schema_json["blob_fields"];
 
   bool has_integer_array = false;
   for (json::iterator it = schema.begin(); it != schema.end(); ++it) {
@@ -52,8 +60,6 @@ ShardColumn::ShardColumn(const std::shared_ptr<ShardHeader> &shard_header, bool
     column_name_id_[column_name_[i]] = i;
   }
 
-  auto blob_fields = first_schema->GetBlobFields();
-
   for (const auto &field : blob_fields) {
     blob_column_.push_back(field);
   }
@@ -282,8 +288,9 @@ ColumnCategory ShardColumn::CheckColumnName(const std::string &column_name) {
   return it_blob == blob_column_id_.end() ? ColumnInRaw : ColumnInBlob;
 }
 
-std::vector<uint8_t> ShardColumn::CompressBlob(const std::vector<uint8_t> &blob) {
+std::vector<uint8_t> ShardColumn::CompressBlob(const std::vector<uint8_t> &blob, int64_t *compression_size) {
   // Skip if no compress columns
+  *compression_size = 0;
   if (!CheckCompressBlob()) return blob;
 
   std::vector<uint8_t> dst_blob;
@@ -295,7 +302,9 @@ std::vector<uint8_t> ShardColumn::CompressBlob(const std::vector<uint8_t> &blob)
 
     // Compress and return is blob has 1 column only
     if (num_blob_column_ == 1) {
-      return CompressInt(blob, int_type);
+      dst_blob = CompressInt(blob, int_type);
+      *compression_size = static_cast<int64_t>(blob.size()) - static_cast<int64_t>(dst_blob.size());
+      return dst_blob;
     }
 
     // Just copy and continue if column dat type is not int32/int64
@@ -319,6 +328,7 @@ std::vector<uint8_t> ShardColumn::CompressBlob(const std::vector<uint8_t> &blob)
     i_src += kInt64Len + num_bytes;
   }
   MS_LOG(DEBUG) << "Compress all blob from " << blob.size() << " to " << dst_blob.size() << ".";
+  *compression_size = static_cast<int64_t>(blob.size()) - static_cast<int64_t>(dst_blob.size());
   return dst_blob;
 }
 

mindspore/ccsrc/minddata/mindrecord/meta/shard_header.cc

@@ -33,7 +33,9 @@ using mindspore::MsLogLevel::ERROR;
 namespace mindspore {
 namespace mindrecord {
 std::atomic<bool> thread_status(false);
-ShardHeader::ShardHeader() : shard_count_(0), header_size_(0), page_size_(0) { index_ = std::make_shared<Index>(); }
+ShardHeader::ShardHeader() : shard_count_(0), header_size_(0), page_size_(0), compression_size_(0) {
+  index_ = std::make_shared<Index>();
+}
 
 MSRStatus ShardHeader::InitializeHeader(const std::vector<json> &headers, bool load_dataset) {
   shard_count_ = headers.size();
@@ -54,6 +56,7 @@ MSRStatus ShardHeader::InitializeHeader(const std::vector<json> &headers, bool l
       ParseShardAddress(header["shard_addresses"]);
       header_size_ = header["header_size"].get<uint64_t>();
       page_size_ = header["page_size"].get<uint64_t>();
+      compression_size_ = header.contains("compression_size") ? header["compression_size"].get<uint64_t>() : 0;
     }
     if (SUCCESS != ParsePage(header["page"], shard_index, load_dataset)) {
       return FAILED;
@@ -146,9 +149,12 @@ std::pair<MSRStatus, json> ShardHeader::BuildSingleHeader(const std::string &fil
     return {FAILED, json()};
   }
   json raw_header = ret.second;
+  uint64_t compression_size =
+    raw_header.contains("compression_size") ? raw_header["compression_size"].get<uint64_t>() : 0;
   json header = {{"shard_addresses", raw_header["shard_addresses"]},
                  {"header_size", raw_header["header_size"]},
                  {"page_size", raw_header["page_size"]},
+                 {"compression_size", compression_size},
                  {"index_fields", raw_header["index_fields"]},
                  {"blob_fields", raw_header["schema"][0]["blob_fields"]},
                  {"schema", raw_header["schema"][0]["schema"]},
@@ -343,6 +349,7 @@ std::vector<std::string> ShardHeader::SerializeHeader() {
       s += "\"index_fields\":" + index + ",";
       s += "\"page\":" + pages[shardId] + ",";
       s += "\"page_size\":" + std::to_string(page_size_) + ",";
+      s += "\"compression_size\":" + std::to_string(compression_size_) + ",";
       s += "\"schema\":" + schema + ",";
       s += "\"shard_addresses\":" + address + ",";
       s += "\"shard_id\":" + std::to_string(shardId) + ",";

mindspore/dataset/engine/datasets.py

@@ -3083,20 +3083,22 @@ def _cpp_sampler_fn(sampler, dataset):
         yield tuple([np.array(x, copy=False) for x in val])
 
 
-def _cpp_sampler_fn_mp(sampler, dataset, num_worker):
+def _cpp_sampler_fn_mp(sampler, dataset, num_worker, multi_process):
     """
     Multiprocessing generator function wrapper for mappable dataset with cpp sampler.
     """
     indices = sampler.get_indices()
-    return _sampler_fn_mp(indices, dataset, num_worker)
+    sample_fn = SamplerFn(dataset, num_worker, multi_process)
+    return sample_fn.process(indices)
 
 
-def _py_sampler_fn_mp(sampler, num_samples, dataset, num_worker):
+def _py_sampler_fn_mp(sampler, num_samples, dataset, num_worker, multi_process):
     """
     Multiprocessing generator function wrapper for mappable dataset with python sampler.
     """
     indices = _fetch_py_sampler_indices(sampler, num_samples)
-    return _sampler_fn_mp(indices, dataset, num_worker)
+    sample_fn = SamplerFn(dataset, num_worker, multi_process)
+    return sample_fn.process(indices)
 
 
 def _fetch_py_sampler_indices(sampler, num_samples):
@@ -3130,63 +3132,92 @@ def _fill_worker_indices(workers, indices, idx):
     return idx
 
 
-def _sampler_fn_mp(indices, dataset, num_worker):
+class SamplerFn:
     """
-    Multiprocessing generator function wrapper master process.
+    Multiprocessing or multithread generator function wrapper master process.
     """
-    workers = []
+    def __init__(self, dataset, num_worker, multi_process):
-    # Event for end of epoch
+        self.workers = []
-    eoe = multiprocessing.Event()
+        self.num_worker = num_worker
+        self.multi_process = multi_process
+        # Event for end of epoch
+        if multi_process is True:
+            self.eoe = multiprocessing.Event()
+            self.eof = multiprocessing.Event()
+        else:
+            self.eoe = threading.Event()
+            self.eof = threading.Event()
+        # Create workers
+        for _ in range(num_worker):
+            if multi_process is True:
+                worker = _GeneratorWorkerMp(dataset, self.eoe, self.eof)
+            else:
+                worker = _GeneratorWorkerMt(dataset, self.eoe, self.eof)
+            worker.daemon = True
+            self.workers.append(worker)
 
-    # Create workers
+    def process(self, indices):
-    for _ in range(num_worker):
+        """
-        worker = _GeneratorWorker(dataset, eoe)
+        The main process, start the child process or child thread, and fill the index queue,
-        worker.daemon = True
+        get the result from the result and return.
-        workers.append(worker)
+        """
+        # Fill initial index queues
+        idx_cursor = 0
+        idx_cursor = _fill_worker_indices(self.workers, indices, idx_cursor)
 
-    # Fill initial index queues
+        # Start all workers
-    idx_cursor = 0
+        for w in self.workers:
-    idx_cursor = _fill_worker_indices(workers, indices, idx_cursor)
+            w.start()
 
-    # Start all workers
+        # Fetch results
-    for w in workers:
+        for i in range(len(indices)):
-        w.start()
+            # Fetch result and put index
+            try:
+                result = self.workers[i % self.num_worker].get()
+            except queue.Empty:
+                raise Exception("Generator worker process timeout")
+            except KeyboardInterrupt:
+                self.eof.set()
+                for w in self.workers:
+                    w.terminate()
+                    w.join()
+                raise Exception("Generator worker receives KeyboardInterrupt")
+            if idx_cursor < len(indices):
+                idx_cursor = _fill_worker_indices(self.workers, indices, idx_cursor)
+            # Set eoe event once all indices are sent
+            if idx_cursor == len(indices) and not self.eoe.is_set():
+                self.eoe.set()
+            yield tuple([np.array(x, copy=False) for x in result])
 
-    # Fetch results
+    def __del__(self):
-    for i in range(len(indices)):
+        self.eoe.set()
-        # Fetch result and put index
+        self.eof.set()
-        try:
+        if self.multi_process is False:
-            result = workers[i % num_worker].get()
+            for w in self.workers:
-        except queue.Empty:
-            raise Exception("Generator worker process timeout")
-        except KeyboardInterrupt:
-            for w in workers:
-                w.terminate()
                 w.join()
-            raise Exception("Generator worker receives KeyboardInterrupt")
-        if idx_cursor < len(indices):
-            idx_cursor = _fill_worker_indices(workers, indices, idx_cursor)
-        # Set eoe event once all indices are sent
-        if idx_cursor == len(indices) and not eoe.is_set():
-            eoe.set()
-        yield tuple([np.array(x, copy=False) for x in result])
 
 
-def _generator_worker_loop(dataset, idx_queue, result_queue, eoe):
+def _generator_worker_loop(dataset, idx_queue, result_queue, eoe, eof):
     """
-    Multiprocessing generator worker process loop.
+    Multiprocessing or multithread generator worker process loop.
     """
     while True:
         # Fetch index, block
         try:
-            idx = idx_queue.get()
+            idx = idx_queue.get(timeout=10)
         except KeyboardInterrupt:
             raise Exception("Generator worker receives KeyboardInterrupt")
+        except queue.Empty:
+            if eof.is_set() or eoe.is_set():
+                raise Exception("Generator worker receives queue.Empty")
+            continue
         if idx is None:
             # When the queue is out of scope from master process, a None item can be fetched from the queue.
             # Upon receiving None, worker process should check if EOE is set.
             assert eoe.is_set(), ""
             return
+        if eof.is_set():
+            return
         # Fetch data, any exception from __getitem__ will terminate worker and timeout master process
         result = dataset[idx]
         # Send data, block
@@ -3195,17 +3226,19 @@ def _generator_worker_loop(dataset, idx_queue, result_queue, eoe):
         except KeyboardInterrupt:
             raise Exception("Generator worker receives KeyboardInterrupt")
         del result, idx
+        if eoe.is_set() and idx_queue.empty():
+            return
 
 
-class _GeneratorWorker(multiprocessing.Process):
+class _GeneratorWorkerMt(threading.Thread):
     """
-    Worker process for multiprocess Generator.
+    Worker process for multithread Generator.
     """
 
-    def __init__(self, dataset, eoe):
+    def __init__(self, dataset, eoe, eof):
-        self.idx_queue = multiprocessing.Queue(16)
+        self.idx_queue = queue.Queue(16)
-        self.res_queue = multiprocessing.Queue(16)
+        self.res_queue = queue.Queue(16)
-        super().__init__(target=_generator_worker_loop, args=(dataset, self.idx_queue, self.res_queue, eoe))
+        super().__init__(target=_generator_worker_loop, args=(dataset, self.idx_queue, self.res_queue, eoe, eof))
 
     def put(self, item):
         """
@@ -3217,7 +3250,30 @@ class _GeneratorWorker(multiprocessing.Process):
         """
         Get function for worker result queue. Block with timeout.
         """
-        return self.res_queue.get()
+        return self.res_queue.get(timeout=10)
+
+
+class _GeneratorWorkerMp(multiprocessing.Process):
+    """
+    Worker process for multiprocess Generator.
+    """
+
+    def __init__(self, dataset, eoe, eof):
+        self.idx_queue = multiprocessing.Queue(16)
+        self.res_queue = multiprocessing.Queue(16)
+        super().__init__(target=_generator_worker_loop, args=(dataset, self.idx_queue, self.res_queue, eoe, eof))
+
+    def put(self, item):
+        """
+        Put function for worker index queue. Never block. Raise queue.Full on failure.
+        """
+        self.idx_queue.put_nowait(item)
+
+    def get(self):
+        """
+        Get function for worker result queue. Block with timeout.
+        """
+        return self.res_queue.get(timeout=10)
 
     def __del__(self):
         self.terminate()
@@ -3280,6 +3336,8 @@ class GeneratorDataset(MappableDataset):
             When this argument is specified, 'num_samples' will not effect. Random accessible input is required.
         shard_id (int, optional): The shard ID within num_shards (default=None). This argument should be specified only
             when num_shards is also specified. Random accessible input is required.
+        python_multiprocessing (bool, optional): Parallelize python operations with multiple worker process. This
+            option could be beneficial if the python operation is computational heavy (default=True).
 
     Examples:
         >>> import mindspore.dataset as ds
@@ -3316,12 +3374,14 @@ class GeneratorDataset(MappableDataset):
 
     @check_generatordataset
     def __init__(self, source, column_names=None, column_types=None, schema=None, num_samples=None,
-                 num_parallel_workers=1, shuffle=None, sampler=None, num_shards=None, shard_id=None):
+                 num_parallel_workers=1, shuffle=None, sampler=None, num_shards=None, shard_id=None,
+                 python_multiprocessing=True):
         super().__init__(num_parallel_workers)
         self.source = source
         self.sampler = _select_sampler(num_samples, sampler, shuffle, num_shards, shard_id)
         self.num_samples = num_samples
         self.num_shards = num_shards
+        self.python_multiprocessing = python_multiprocessing
 
         if column_names is not None and not isinstance(column_names, list):
             column_names = [column_names]
@@ -3403,12 +3463,16 @@ class GeneratorDataset(MappableDataset):
                 sampler_instance.set_num_rows(len(self.source))
                 sampler_instance.initialize()
                 if new_op.num_parallel_workers > 1:
-                    new_op.source = (lambda: _cpp_sampler_fn_mp(sampler_instance, self.source, new_op.num_parallel_workers))
+                    new_op.source = (lambda: _cpp_sampler_fn_mp(sampler_instance, self.source,
+                                                                new_op.num_parallel_workers,
+                                                                self.python_multiprocessing))
                 else:
                     new_op.source = (lambda: _cpp_sampler_fn(sampler_instance, self.source))
             else:
                 if new_op.num_parallel_workers > 1:
-                    new_op.source = (lambda: _py_sampler_fn_mp(new_op.sampler, new_op.num_samples, self.source, new_op.num_parallel_workers))
+                    new_op.source = (lambda: _py_sampler_fn_mp(new_op.sampler, new_op.num_samples, self.source,
+                                                               new_op.num_parallel_workers,
+                                                               self.python_multiprocessing))
                 else:
                     new_op.source = (lambda: _py_sampler_fn(new_op.sampler, new_op.num_samples, self.source))
         else:

mindspore/dataset/engine/graphdata.py

@@ -16,8 +16,11 @@
 graphdata.py supports loading graph dataset for GNN network training,
 and provides operations related to graph data.
 """
+import atexit
+import time
 import numpy as np
-from mindspore._c_dataengine import Graph
+from mindspore._c_dataengine import GraphDataClient
+from mindspore._c_dataengine import GraphDataServer
 from mindspore._c_dataengine import Tensor
 
 from .validators import check_gnn_graphdata, check_gnn_get_all_nodes, check_gnn_get_all_edges, \
@@ -34,14 +37,52 @@ class GraphData:
         dataset_file (str): One of file names in dataset.
         num_parallel_workers (int, optional): Number of workers to process the Dataset in parallel
             (default=None).
+        working_mode (str, optional): Set working mode, now support 'local'/'client'/'server' (default='local').
+
+            - 'local', used in non-distributed training scenarios.
+
+            - 'client', used in distributed training scenarios, the client does not load data,
+              but obtains data from the server.
+
+            - 'server', used in distributed training scenarios, the server loads the data
+              and is available to the client.
+
+        hostname (str, optional): Valid when working_mode is set to 'client' or 'server',
+            set the hostname of the graph data server (default='127.0.0.1').
+        port (int, optional): Valid when working_mode is set to 'client' or 'server',
+            set the port of the graph data server, the range is 1024-65535 (default=50051).
+        num_client (int, optional): Valid when working_mode is set to 'server',
+            set the number of clients expected to connect, and the server will allocate corresponding
+            resources according to this parameter (default=1).
+        auto_shutdown (bool, optional): Valid when working_mode is set to 'server',
+            Control when all clients have connected and no client connected to the server,
+            automatically exit the server (default=True).
     """
 
     @check_gnn_graphdata
-    def __init__(self, dataset_file, num_parallel_workers=None):
+    def __init__(self, dataset_file, num_parallel_workers=None, working_mode='local', hostname='127.0.0.1', port=50051,
+                 num_client=1, auto_shutdown=True):
         self._dataset_file = dataset_file
+        self._working_mode = working_mode
         if num_parallel_workers is None:
             num_parallel_workers = 1
-        self._graph = Graph(dataset_file, num_parallel_workers)
+
+        def stop():
+            self._graph_data.stop()
+        atexit.register(stop)
+
+        if working_mode in ['local', 'client']:
+            self._graph_data = GraphDataClient(dataset_file, num_parallel_workers, working_mode, hostname, port)
+
+        if working_mode == 'server':
+            self._graph_data = GraphDataServer(
+                dataset_file, num_parallel_workers, hostname, port, num_client, auto_shutdown)
+            try:
+                while self._graph_data.is_stoped() is not True:
+                    time.sleep(1)
+            except KeyboardInterrupt:
+                # self._graph_data.stop()
+                raise Exception("Graph data server receives KeyboardInterrupt")
 
     @check_gnn_get_all_nodes
     def get_all_nodes(self, node_type):
@@ -62,7 +103,9 @@ class GraphData:
         Raises:
             TypeError: If `node_type` is not integer.
         """
-        return self._graph.get_all_nodes(node_type).as_array()
+        if self._working_mode == 'server':
+            raise Exception("This method is not supported when working mode is server")
+        return self._graph_data.get_all_nodes(node_type).as_array()
 
     @check_gnn_get_all_edges
     def get_all_edges(self, edge_type):
@@ -83,7 +126,9 @@ class GraphData:
         Raises:
             TypeError: If `edge_type` is not integer.
         """
-        return self._graph.get_all_edges(edge_type).as_array()
+        if self._working_mode == 'server':
+            raise Exception("This method is not supported when working mode is server")
+        return self._graph_data.get_all_edges(edge_type).as_array()
 
     @check_gnn_get_nodes_from_edges
     def get_nodes_from_edges(self, edge_list):
@@ -99,7 +144,9 @@ class GraphData:
         Raises:
             TypeError: If `edge_list` is not list or ndarray.
         """
-        return self._graph.get_nodes_from_edges(edge_list).as_array()
+        if self._working_mode == 'server':
+            raise Exception("This method is not supported when working mode is server")
+        return self._graph_data.get_nodes_from_edges(edge_list).as_array()
 
     @check_gnn_get_all_neighbors
     def get_all_neighbors(self, node_list, neighbor_type):
@@ -123,7 +170,9 @@ class GraphData:
             TypeError: If `node_list` is not list or ndarray.
             TypeError: If `neighbor_type` is not integer.
         """
-        return self._graph.get_all_neighbors(node_list, neighbor_type).as_array()
+        if self._working_mode == 'server':
+            raise Exception("This method is not supported when working mode is server")
+        return self._graph_data.get_all_neighbors(node_list, neighbor_type).as_array()
 
     @check_gnn_get_sampled_neighbors
     def get_sampled_neighbors(self, node_list, neighbor_nums, neighbor_types):
@@ -155,7 +204,9 @@ class GraphData:
             TypeError: If `neighbor_nums` is not list or ndarray.
             TypeError: If `neighbor_types` is not list or ndarray.
         """
-        return self._graph.get_sampled_neighbors(
+        if self._working_mode == 'server':
+            raise Exception("This method is not supported when working mode is server")
+        return self._graph_data.get_sampled_neighbors(
             node_list, neighbor_nums, neighbor_types).as_array()
 
     @check_gnn_get_neg_sampled_neighbors
@@ -182,7 +233,9 @@ class GraphData:
             TypeError: If `neg_neighbor_num` is not integer.
             TypeError: If `neg_neighbor_type` is not integer.
         """
-        return self._graph.get_neg_sampled_neighbors(
+        if self._working_mode == 'server':
+            raise Exception("This method is not supported when working mode is server")
+        return self._graph_data.get_neg_sampled_neighbors(
             node_list, neg_neighbor_num, neg_neighbor_type).as_array()
 
     @check_gnn_get_node_feature
@@ -207,10 +260,12 @@ class GraphData:
             TypeError: If `node_list` is not list or ndarray.
             TypeError: If `feature_types` is not list or ndarray.
         """
+        if self._working_mode == 'server':
+            raise Exception("This method is not supported when working mode is server")
         if isinstance(node_list, list):
             node_list = np.array(node_list, dtype=np.int32)
         return [
-            t.as_array() for t in self._graph.get_node_feature(
+            t.as_array() for t in self._graph_data.get_node_feature(
                 Tensor(node_list),
                 feature_types)]
 
@@ -236,10 +291,12 @@ class GraphData:
             TypeError: If `edge_list` is not list or ndarray.
             TypeError: If `feature_types` is not list or ndarray.
         """
+        if self._working_mode == 'server':
+            raise Exception("This method is not supported when working mode is server")
         if isinstance(edge_list, list):
             edge_list = np.array(edge_list, dtype=np.int32)
         return [
-            t.as_array() for t in self._graph.get_edge_feature(
+            t.as_array() for t in self._graph_data.get_edge_feature(
                 Tensor(edge_list),
                 feature_types)]
 
@@ -252,7 +309,9 @@ class GraphData:
             dict: Meta information of the graph. The key is node_type, edge_type, node_num, edge_num,
             node_feature_type and edge_feature_type.
         """
-        return self._graph.graph_info()
+        if self._working_mode == 'server':
+            raise Exception("This method is not supported when working mode is server")
+        return self._graph_data.graph_info()
 
     @check_gnn_random_walk
     def random_walk(
@@ -285,5 +344,7 @@ class GraphData:
             TypeError: If `target_nodes` is not list or ndarray.
             TypeError: If `meta_path` is not list or ndarray.
         """
-        return self._graph.random_walk(target_nodes, meta_path, step_home_param, step_away_param,
+        if self._working_mode == 'server':
-                                       default_node).as_array()
+            raise Exception("This method is not supported when working mode is server")
+        return self._graph_data.random_walk(target_nodes, meta_path, step_home_param, step_away_param,
+                                            default_node).as_array()

mindspore/dataset/engine/validators.py

@@ -18,6 +18,7 @@ Built-in validators.
 """
 import inspect as ins
 import os
+import re
 from functools import wraps
 
 import numpy as np
@@ -912,16 +913,36 @@ def check_split(method):
     return new_method
 
 
+def check_hostname(hostname):
+    if len(hostname) > 255:
+        return False
+    if hostname[-1] == ".":
+        hostname = hostname[:-1] # strip exactly one dot from the right, if present
+    allowed = re.compile("(?!-)[A-Z\\d-]{1,63}(?<!-)$", re.IGNORECASE)
+    return all(allowed.match(x) for x in hostname.split("."))
+
+
 def check_gnn_graphdata(method):
     """check the input arguments of graphdata."""
 
     @wraps(method)
     def new_method(self, *args, **kwargs):
-        [dataset_file, num_parallel_workers], _ = parse_user_args(method, *args, **kwargs)
+        [dataset_file, num_parallel_workers, working_mode, hostname,
+         port, num_client, auto_shutdown], _ = parse_user_args(method, *args, **kwargs)
         check_file(dataset_file)
-
         if num_parallel_workers is not None:
             check_num_parallel_workers(num_parallel_workers)
+        type_check(hostname, (str,), "hostname")
+        if check_hostname(hostname) is False:
+            raise ValueError("The hostname is illegal")
+        type_check(working_mode, (str,), "working_mode")
+        if working_mode not in {'local', 'client', 'server'}:
+            raise ValueError("Invalid working mode")
+        type_check(port, (int,), "port")
+        check_value(port, (1024, 65535), "port")
+        type_check(num_client, (int,), "num_client")
+        check_value(num_client, (1, 255), "num_client")
+        type_check(auto_shutdown, (bool,), "auto_shutdown")
         return method(self, *args, **kwargs)
 
     return new_method

model_zoo/utils/graph_to_mindrecord/sns/mr_api.py

@@ -15,6 +15,7 @@
 """
 User-defined API for MindRecord GNN writer.
 """
+import numpy as np
 social_data = [[348, 350], [348, 327], [348, 329], [348, 331], [348, 335],
                [348, 336], [348, 337], [348, 338], [348, 340], [348, 341],
                [348, 342], [348, 343], [348, 344], [348, 345], [348, 346],
@@ -29,7 +30,7 @@ social_data = [[348, 350], [348, 327], [348, 329], [348, 331], [348, 335],
                [355, 352], [353, 350], [352, 349], [351, 349], [350, 349]]
 
 # profile:  (num_features, feature_data_types, feature_shapes)
-node_profile = (0, [], [])
+node_profile = (2, ["int64", "int32"], [[-1], [-1]])
 edge_profile = (0, [], [])
 
 
@@ -51,7 +52,9 @@ def yield_nodes(task_id=0):
     node_list.sort()
     print(node_list)
     for node_id in node_list:
-        node = {'id': node_id, 'type': 1}
+        node = {'id': node_id, 'type': 1,
+                'feature_1': np.ones((5,), dtype=np.int64),
+                'feature_2': np.ones((10,), dtype=np.int32)}
         yield node
 
 

tests/ut/cpp/dataset/gnn_graph_test.cc

@@ -22,6 +22,7 @@
 #include "gtest/gtest.h"
 #include "minddata/dataset/util/status.h"
 #include "minddata/dataset/engine/gnn/node.h"
+#include "minddata/dataset/engine/gnn/graph_data_impl.h"
 #include "minddata/dataset/engine/gnn/graph_loader.h"
 
 using namespace mindspore::dataset;
@@ -39,30 +40,9 @@ class MindDataTestGNNGraph : public UT::Common {
   MindDataTestGNNGraph() = default;
 };
 
-TEST_F(MindDataTestGNNGraph, TestGraphLoader) {
-  std::string path = "data/mindrecord/testGraphData/testdata";
-  GraphLoader gl(path, 4);
-  EXPECT_TRUE(gl.InitAndLoad().IsOk());
-  NodeIdMap n_id_map;
-  EdgeIdMap e_id_map;
-  NodeTypeMap n_type_map;
-  EdgeTypeMap e_type_map;
-  NodeFeatureMap n_feature_map;
-  EdgeFeatureMap e_feature_map;
-  DefaultNodeFeatureMap default_node_feature_map;
-  DefaultEdgeFeatureMap default_edge_feature_map;
-  EXPECT_TRUE(gl.GetNodesAndEdges(&n_id_map, &e_id_map, &n_type_map, &e_type_map, &n_feature_map, &e_feature_map,
-                                  &default_node_feature_map, &default_edge_feature_map)
-                .IsOk());
-  EXPECT_EQ(n_id_map.size(), 20);
-  EXPECT_EQ(e_id_map.size(), 40);
-  EXPECT_EQ(n_type_map[2].size(), 10);
-  EXPECT_EQ(n_type_map[1].size(), 10);
-}
-
 TEST_F(MindDataTestGNNGraph, TestGetAllNeighbors) {
   std::string path = "data/mindrecord/testGraphData/testdata";
-  Graph graph(path, 1);
+  GraphDataImpl graph(path, 1);
   Status s = graph.Init();
   EXPECT_TRUE(s.IsOk());
 
@@ -103,7 +83,7 @@ TEST_F(MindDataTestGNNGraph, TestGetAllNeighbors) {
 
 TEST_F(MindDataTestGNNGraph, TestGetSampledNeighbors) {
   std::string path = "data/mindrecord/testGraphData/testdata";
-  Graph graph(path, 1);
+  GraphDataImpl graph(path, 1);
   Status s = graph.Init();
   EXPECT_TRUE(s.IsOk());
 
@@ -194,7 +174,7 @@ TEST_F(MindDataTestGNNGraph, TestGetSampledNeighbors) {
 
 TEST_F(MindDataTestGNNGraph, TestGetNegSampledNeighbors) {
   std::string path = "data/mindrecord/testGraphData/testdata";
-  Graph graph(path, 1);
+  GraphDataImpl graph(path, 1);
   Status s = graph.Init();
   EXPECT_TRUE(s.IsOk());
 
@@ -237,7 +217,7 @@ TEST_F(MindDataTestGNNGraph, TestGetNegSampledNeighbors) {
 
 TEST_F(MindDataTestGNNGraph, TestRandomWalk) {
   std::string path = "data/mindrecord/testGraphData/sns";
-  Graph graph(path, 1);
+  GraphDataImpl graph(path, 1);
   Status s = graph.Init();
   EXPECT_TRUE(s.IsOk());
 
@@ -263,7 +243,7 @@ TEST_F(MindDataTestGNNGraph, TestRandomWalk) {
 
 TEST_F(MindDataTestGNNGraph, TestRandomWalkDefaults) {
   std::string path = "data/mindrecord/testGraphData/sns";
-  Graph graph(path, 1);
+  GraphDataImpl graph(path, 1);
   Status s = graph.Init();
   EXPECT_TRUE(s.IsOk());
 

tests/ut/python/dataset/test_graphdata_distributed.py

@@ -0,0 +1,125 @@
+# Copyright 2020 Huawei Technologies Co., Ltd
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+# ==============================================================================
+
+import random
+import time
+from multiprocessing import Process
+import numpy as np
+import mindspore.dataset as ds
+from mindspore import log as logger
+
+DATASET_FILE = "../data/mindrecord/testGraphData/testdata"
+
+
+def graphdata_startserver():
+    """
+    start graphdata server
+    """
+    logger.info('test start server.\n')
+    ds.GraphData(DATASET_FILE, 1, 'server')
+
+
+class RandomBatchedSampler(ds.Sampler):
+    # RandomBatchedSampler generate random sequence without replacement in a batched manner
+    def __init__(self, index_range, num_edges_per_sample):
+        super().__init__()
+        self.index_range = index_range
+        self.num_edges_per_sample = num_edges_per_sample
+
+    def __iter__(self):
+        indices = [i+1 for i in range(self.index_range)]
+        # Reset random seed here if necessary
+        # random.seed(0)
+        random.shuffle(indices)
+        for i in range(0, self.index_range, self.num_edges_per_sample):
+            # Drop reminder
+            if i + self.num_edges_per_sample <= self.index_range:
+                yield indices[i: i + self.num_edges_per_sample]
+
+
+class GNNGraphDataset():
+    def __init__(self, g, batch_num):
+        self.g = g
+        self.batch_num = batch_num
+
+    def __len__(self):
+        # Total sample size of GNN dataset
+        # In this case, the size should be total_num_edges/num_edges_per_sample
+        return self.g.graph_info()['edge_num'][0] // self.batch_num
+
+    def __getitem__(self, index):
+        # index will be a list of indices yielded from RandomBatchedSampler
+        # Fetch edges/nodes/samples/features based on indices
+        nodes = self.g.get_nodes_from_edges(index.astype(np.int32))
+        nodes = nodes[:, 0]
+        neg_nodes = self.g.get_neg_sampled_neighbors(
+            node_list=nodes, neg_neighbor_num=3, neg_neighbor_type=1)
+        nodes_neighbors = self.g.get_sampled_neighbors(node_list=nodes, neighbor_nums=[
+            2, 2], neighbor_types=[2, 1])
+        neg_nodes_neighbors = self.g.get_sampled_neighbors(
+            node_list=neg_nodes[:, 1:].reshape(-1), neighbor_nums=[2, 2], neighbor_types=[2, 2])
+        nodes_neighbors_features = self.g.get_node_feature(
+            node_list=nodes_neighbors, feature_types=[2, 3])
+        neg_neighbors_features = self.g.get_node_feature(
+            node_list=neg_nodes_neighbors, feature_types=[2, 3])
+        return nodes_neighbors, neg_nodes_neighbors, nodes_neighbors_features[0], neg_neighbors_features[1]
+
+
+def test_graphdata_distributed():
+    """
+    Test distributed
+    """
+    logger.info('test distributed.\n')
+
+    p1 = Process(target=graphdata_startserver)
+    p1.start()
+    time.sleep(2)
+
+    g = ds.GraphData(DATASET_FILE, 1, 'client')
+    nodes = g.get_all_nodes(1)
+    assert nodes.tolist() == [101, 102, 103, 104, 105, 106, 107, 108, 109, 110]
+    row_tensor = g.get_node_feature(nodes.tolist(), [1, 2, 3])
+    assert row_tensor[0].tolist() == [[0, 1, 0, 0, 0], [1, 0, 0, 0, 1], [0, 0, 1, 1, 0], [0, 0, 0, 0, 0],
+                                      [1, 1, 0, 1, 0], [0, 0, 0, 0, 1], [0, 1, 0, 0, 0], [0, 0, 0, 1, 1],
+                                      [0, 1, 1, 0, 0], [0, 1, 0, 1, 0]]
+    assert row_tensor[2].tolist() == [1, 2, 3, 1, 4, 3, 5, 3, 5, 4]
+
+    edges = g.get_all_edges(0)
+    assert edges.tolist() == [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20,
+                              21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40]
+    features = g.get_edge_feature(edges, [1, 2])
+    assert features[0].tolist() == [0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0,
+                                    0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0]
+
+    batch_num = 2
+    edge_num = g.graph_info()['edge_num'][0]
+    out_column_names = ["neighbors", "neg_neighbors", "neighbors_features", "neg_neighbors_features"]
+    dataset = ds.GeneratorDataset(source=GNNGraphDataset(g, batch_num), column_names=out_column_names,
+                                  sampler=RandomBatchedSampler(edge_num, batch_num), num_parallel_workers=4,
+                                  python_multiprocessing=False)
+    dataset = dataset.repeat(2)
+    itr = dataset.create_dict_iterator()
+    i = 0
+    for data in itr:
+        assert data['neighbors'].shape == (2, 7)
+        assert data['neg_neighbors'].shape == (6, 7)
+        assert data['neighbors_features'].shape == (2, 7)
+        assert data['neg_neighbors_features'].shape == (6, 7)
+        i += 1
+    assert i == 40
+
+
+if __name__ == '__main__':
+    test_graphdata_distributed()