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foundationdb/fdbserver/RestoreWorkerInterface.actor.h

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/*
* RestoreWorkerInterface.actor.h
*
* This source file is part of the FoundationDB open source project
*
* Copyright 2013-2018 Apple Inc. and the FoundationDB project authors
*
* 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.
*/
// This file declare and define the interface for RestoreWorker and restore roles
// which are RestoreController, RestoreLoader, and RestoreApplier
#pragma once
#if defined(NO_INTELLISENSE) && !defined(FDBSERVER_RESTORE_WORKER_INTERFACE_ACTOR_G_H)
#define FDBSERVER_RESTORE_WORKER_INTERFACE_ACTOR_G_H
#include "fdbserver/RestoreWorkerInterface.actor.g.h"
#elif !defined(FDBSERVER_RESTORE_WORKER_INTERFACE_ACTOR_H)
#define FDBSERVER_RESTORE_WORKER_INTERFACE_ACTOR_H
#include <sstream>
#include <string>
#include "flow/flow.h"
#include "fdbrpc/fdbrpc.h"
#include "fdbrpc/Locality.h"
#include "fdbrpc/Stats.h"
#include "fdbclient/FDBTypes.h"
#include "fdbclient/CommitTransaction.h"
#include "fdbserver/CoordinationInterface.h"
#include "fdbserver/Knobs.h"
#include "fdbserver/RestoreUtil.h"
#include "flow/actorcompiler.h" // This must be the last #include.
class RestoreConfigFR;
struct RestoreCommonReply;
struct RestoreRecruitRoleRequest;
struct RestoreSysInfoRequest;
struct RestoreLoadFileRequest;
struct RestoreVersionBatchRequest;
struct RestoreSendMutationsToAppliersRequest;
struct RestoreSendVersionedMutationsRequest;
struct RestoreSysInfo;
struct RestoreApplierInterface;
struct RestoreFinishRequest;
struct RestoreSamplesRequest;
struct RestoreUpdateRateRequest;
// RestoreSysInfo includes information each (type of) restore roles should know.
// At this moment, it only include appliers. We keep the name for future extension.
// TODO: If it turns out this struct only has appliers in the final version, we will rename it to a more specific name,
// e.g., AppliersMap
struct RestoreSysInfo {
constexpr static FileIdentifier file_identifier = 68098739;
std::map<UID, RestoreApplierInterface> appliers;
RestoreSysInfo() = default;
explicit RestoreSysInfo(const std::map<UID, RestoreApplierInterface> appliers) : appliers(appliers) {}
template <class Ar>
void serialize(Ar& ar) {
serializer(ar, appliers);
}
};
struct RestoreWorkerInterface {
constexpr static FileIdentifier file_identifier = 15715718;
UID interfID;
RequestStream<RestoreSimpleRequest> heartbeat;
RequestStream<RestoreRecruitRoleRequest> recruitRole;
RequestStream<RestoreSimpleRequest> terminateWorker;
bool operator==(RestoreWorkerInterface const& r) const { return id() == r.id(); }
bool operator!=(RestoreWorkerInterface const& r) const { return id() != r.id(); }
UID id() const { return interfID; } // cmd.getEndpoint().token;
NetworkAddress address() const { return recruitRole.getEndpoint().addresses.address; }
void initEndpoints() {
heartbeat.getEndpoint(TaskPriority::LoadBalancedEndpoint);
recruitRole.getEndpoint(TaskPriority::LoadBalancedEndpoint); // Q: Why do we need this?
terminateWorker.getEndpoint(TaskPriority::LoadBalancedEndpoint);
interfID = deterministicRandom()->randomUniqueID();
}
// To change this serialization, ProtocolVersion::RestoreWorkerInterfaceValue must be updated, and downgrades need
// to be considered
template <class Ar>
void serialize(Ar& ar) {
serializer(ar, interfID, heartbeat, recruitRole, terminateWorker);
}
};
struct RestoreRoleInterface {
constexpr static FileIdentifier file_identifier = 12199691;
UID nodeID;
RestoreRole role;
RestoreRoleInterface() { role = RestoreRole::Invalid; }
explicit RestoreRoleInterface(RestoreRoleInterface const& interf) : nodeID(interf.nodeID), role(interf.role){};
UID id() const { return nodeID; }
std::string toString() const {
std::stringstream ss;
ss << "Role:" << getRoleStr(role) << " interfID:" << nodeID.toString();
return ss.str();
}
template <class Ar>
void serialize(Ar& ar) {
serializer(ar, nodeID, role);
}
};
struct RestoreLoaderInterface : RestoreRoleInterface {
constexpr static FileIdentifier file_identifier = 358571;
RequestStream<RestoreSimpleRequest> heartbeat;
RequestStream<RestoreSysInfoRequest> updateRestoreSysInfo;
RequestStream<RestoreLoadFileRequest> loadFile;
RequestStream<RestoreSendMutationsToAppliersRequest> sendMutations;
RequestStream<RestoreVersionBatchRequest> initVersionBatch;
RequestStream<RestoreVersionBatchRequest> finishVersionBatch;
RequestStream<RestoreSimpleRequest> collectRestoreRoleInterfaces;
RequestStream<RestoreFinishRequest> finishRestore;
bool operator==(RestoreWorkerInterface const& r) const { return id() == r.id(); }
bool operator!=(RestoreWorkerInterface const& r) const { return id() != r.id(); }
RestoreLoaderInterface() {
role = RestoreRole::Loader;
nodeID = deterministicRandom()->randomUniqueID();
}
NetworkAddress address() const { return heartbeat.getEndpoint().addresses.address; }
void initEndpoints() {
// Endpoint in a later restore phase has higher priority
heartbeat.getEndpoint(TaskPriority::LoadBalancedEndpoint);
updateRestoreSysInfo.getEndpoint(TaskPriority::LoadBalancedEndpoint);
initVersionBatch.getEndpoint(TaskPriority::LoadBalancedEndpoint);
loadFile.getEndpoint(TaskPriority::RestoreLoaderLoadFiles);
sendMutations.getEndpoint(TaskPriority::RestoreLoaderSendMutations);
finishVersionBatch.getEndpoint(TaskPriority::RestoreLoaderFinishVersionBatch);
collectRestoreRoleInterfaces.getEndpoint(TaskPriority::LoadBalancedEndpoint);
finishRestore.getEndpoint(TaskPriority::LoadBalancedEndpoint);
}
template <class Ar>
void serialize(Ar& ar) {
serializer(ar,
*(RestoreRoleInterface*)this,
heartbeat,
updateRestoreSysInfo,
loadFile,
sendMutations,
initVersionBatch,
finishVersionBatch,
collectRestoreRoleInterfaces,
finishRestore);
}
};
struct RestoreApplierInterface : RestoreRoleInterface {
constexpr static FileIdentifier file_identifier = 3921400;
RequestStream<RestoreSimpleRequest> heartbeat;
RequestStream<RestoreSendVersionedMutationsRequest> sendMutationVector;
RequestStream<RestoreVersionBatchRequest> applyToDB;
RequestStream<RestoreVersionBatchRequest> initVersionBatch;
RequestStream<RestoreSimpleRequest> collectRestoreRoleInterfaces;
RequestStream<RestoreFinishRequest> finishRestore;
RequestStream<RestoreUpdateRateRequest> updateRate;
bool operator==(RestoreWorkerInterface const& r) const { return id() == r.id(); }
bool operator!=(RestoreWorkerInterface const& r) const { return id() != r.id(); }
RestoreApplierInterface() {
role = RestoreRole::Applier;
nodeID = deterministicRandom()->randomUniqueID();
}
NetworkAddress address() const { return heartbeat.getEndpoint().addresses.address; }
void initEndpoints() {
// Endpoint in a later restore phase has higher priority
heartbeat.getEndpoint(TaskPriority::LoadBalancedEndpoint);
sendMutationVector.getEndpoint(TaskPriority::RestoreApplierReceiveMutations);
applyToDB.getEndpoint(TaskPriority::RestoreApplierWriteDB);
initVersionBatch.getEndpoint(TaskPriority::LoadBalancedEndpoint);
collectRestoreRoleInterfaces.getEndpoint(TaskPriority::LoadBalancedEndpoint);
finishRestore.getEndpoint(TaskPriority::LoadBalancedEndpoint);
updateRate.getEndpoint(TaskPriority::LoadBalancedEndpoint);
}
template <class Ar>
void serialize(Ar& ar) {
serializer(ar,
*(RestoreRoleInterface*)this,
heartbeat,
sendMutationVector,
applyToDB,
initVersionBatch,
collectRestoreRoleInterfaces,
finishRestore,
updateRate);
}
std::string toString() const { return nodeID.toString(); }
};
struct RestoreControllerInterface : RestoreRoleInterface {
constexpr static FileIdentifier file_identifier = 11642024;
RequestStream<RestoreSamplesRequest> samples;
bool operator==(RestoreWorkerInterface const& r) const { return id() == r.id(); }
bool operator!=(RestoreWorkerInterface const& r) const { return id() != r.id(); }
RestoreControllerInterface() {
role = RestoreRole::Controller;
nodeID = deterministicRandom()->randomUniqueID();
}
NetworkAddress address() const { return samples.getEndpoint().addresses.address; }
void initEndpoints() { samples.getEndpoint(TaskPriority::LoadBalancedEndpoint); }
template <class Ar>
void serialize(Ar& ar) {
serializer(ar, *(RestoreRoleInterface*)this, samples);
}
std::string toString() const { return nodeID.toString(); }
};
// RestoreAsset uniquely identifies the work unit done by restore roles;
// It is used to ensure exact-once processing on restore loader and applier;
// By combining all RestoreAssets across all verstion batches, restore should process all mutations in
// backup range and log files up to the target restore version.
struct RestoreAsset {
UID uid;
Version beginVersion, endVersion; // Only use mutation in [begin, end) versions;
KeyRange range; // Only use mutations in range
int fileIndex;
// Partition ID for mutation log files, which is also encoded in the filename of mutation logs.
int partitionId = -1;
std::string filename;
int64_t offset;
int64_t len;
Key addPrefix;
Key removePrefix;
int batchIndex; // for progress tracking and performance investigation
RestoreAsset() = default;
// Q: Can we simply use uid for == and use different comparison rule for less than operator.
// The ordering of RestoreAsset may change, will that affect correctness or performance?
bool operator==(const RestoreAsset& r) const {
return batchIndex == r.batchIndex && beginVersion == r.beginVersion && endVersion == r.endVersion &&
range == r.range && fileIndex == r.fileIndex && partitionId == r.partitionId && filename == r.filename &&
offset == r.offset && len == r.len && addPrefix == r.addPrefix && removePrefix == r.removePrefix;
}
bool operator!=(const RestoreAsset& r) const { return !(*this == r); }
bool operator<(const RestoreAsset& r) const {
return std::make_tuple(batchIndex,
fileIndex,
filename,
offset,
len,
beginVersion,
endVersion,
range.begin,
range.end,
addPrefix,
removePrefix) < std::make_tuple(r.batchIndex,
r.fileIndex,
r.filename,
r.offset,
r.len,
r.beginVersion,
r.endVersion,
r.range.begin,
r.range.end,
r.addPrefix,
r.removePrefix);
}
template <class Ar>
void serialize(Ar& ar) {
serializer(ar,
uid,
beginVersion,
endVersion,
range,
filename,
fileIndex,
partitionId,
offset,
len,
addPrefix,
removePrefix,
batchIndex);
}
std::string toString() const {
std::stringstream ss;
ss << "UID:" << uid.toString() << " begin:" << beginVersion << " end:" << endVersion
<< " range:" << range.toString() << " filename:" << filename << " fileIndex:" << fileIndex
<< " partitionId:" << partitionId << " offset:" << offset << " len:" << len
<< " addPrefix:" << addPrefix.toString() << " removePrefix:" << removePrefix.toString()
<< " BatchIndex:" << batchIndex;
return ss.str();
}
bool hasPrefix() const { return addPrefix.size() > 0 || removePrefix.size() > 0; }
// RestoreAsset and VersionBatch both use endVersion as exclusive in version range
bool isInVersionRange(Version commitVersion) const {
return commitVersion >= beginVersion && commitVersion < endVersion;
}
// Is mutation's begin and end keys are in RestoreAsset's range
bool isInKeyRange(MutationRef mutation) const {
if (hasPrefix()) {
Key begin = range.begin; // Avoid creating new keys if we do not have addPrefix or removePrefix
Key end = range.end;
begin = begin.removePrefix(removePrefix).withPrefix(addPrefix);
end = end.removePrefix(removePrefix).withPrefix(addPrefix);
if (isRangeMutation(mutation)) {
// Range mutation's right side is exclusive
return mutation.param1 >= begin && mutation.param2 <= end;
} else {
return mutation.param1 >= begin && mutation.param1 < end;
}
} else {
if (isRangeMutation(mutation)) {
// Range mutation's right side is exclusive
return mutation.param1 >= range.begin && mutation.param2 <= range.end;
} else {
return mutation.param1 >= range.begin && mutation.param1 < range.end;
}
}
}
};
struct LoadingParam {
constexpr static FileIdentifier file_identifier = 246621;
bool isRangeFile;
Key url;
Optional<Version> rangeVersion; // range file's version
int64_t blockSize;
RestoreAsset asset;
LoadingParam() = default;
// TODO: Compare all fields for loadingParam
bool operator==(const LoadingParam& r) const { return isRangeFile == r.isRangeFile && asset == r.asset; }
bool operator!=(const LoadingParam& r) const { return isRangeFile != r.isRangeFile || asset != r.asset; }
bool operator<(const LoadingParam& r) const {
return (isRangeFile < r.isRangeFile) || (isRangeFile == r.isRangeFile && asset < r.asset);
}
bool isPartitionedLog() const { return !isRangeFile && asset.partitionId >= 0; }
template <class Ar>
void serialize(Ar& ar) {
serializer(ar, isRangeFile, url, rangeVersion, blockSize, asset);
}
std::string toString() const {
std::stringstream str;
str << "isRangeFile:" << isRangeFile << " url:" << url.toString()
<< " rangeVersion:" << (rangeVersion.present() ? rangeVersion.get() : -1) << " blockSize:" << blockSize
<< " RestoreAsset:" << asset.toString();
return str.str();
}
};
struct RestoreRecruitRoleReply : TimedRequest {
constexpr static FileIdentifier file_identifier = 13532876;
UID id;
RestoreRole role;
Optional<RestoreLoaderInterface> loader;
Optional<RestoreApplierInterface> applier;
RestoreRecruitRoleReply() = default;
explicit RestoreRecruitRoleReply(UID id, RestoreRole role, RestoreLoaderInterface const& loader)
: id(id), role(role), loader(loader) {}
explicit RestoreRecruitRoleReply(UID id, RestoreRole role, RestoreApplierInterface const& applier)
: id(id), role(role), applier(applier) {}
template <class Ar>
void serialize(Ar& ar) {
serializer(ar, id, role, loader, applier);
}
std::string toString() const {
std::stringstream ss;
ss << "roleInterf role:" << getRoleStr(role) << " replyID:" << id.toString();
if (loader.present()) {
ss << "loader:" << loader.get().toString();
}
if (applier.present()) {
ss << "applier:" << applier.get().toString();
}
return ss.str();
}
};
struct RestoreRecruitRoleRequest : TimedRequest {
constexpr static FileIdentifier file_identifier = 3136280;
RestoreControllerInterface ci;
RestoreRole role;
int nodeIndex; // Each role is a node
ReplyPromise<RestoreRecruitRoleReply> reply;
RestoreRecruitRoleRequest() : role(RestoreRole::Invalid) {}
explicit RestoreRecruitRoleRequest(RestoreControllerInterface ci, RestoreRole role, int nodeIndex)
: ci(ci), role(role), nodeIndex(nodeIndex) {}
template <class Ar>
void serialize(Ar& ar) {
serializer(ar, ci, role, nodeIndex, reply);
}
std::string printable() const {
std::stringstream ss;
ss << "RestoreRecruitRoleRequest Role:" << getRoleStr(role) << " NodeIndex:" << nodeIndex
<< " RestoreController:" << ci.id().toString();
return ss.str();
}
std::string toString() const { return printable(); }
};
// Static info. across version batches
struct RestoreSysInfoRequest : TimedRequest {
constexpr static FileIdentifier file_identifier = 8851877;
RestoreSysInfo sysInfo;
Standalone<VectorRef<std::pair<KeyRangeRef, Version>>> rangeVersions;
ReplyPromise<RestoreCommonReply> reply;
RestoreSysInfoRequest() = default;
explicit RestoreSysInfoRequest(RestoreSysInfo sysInfo,
Standalone<VectorRef<std::pair<KeyRangeRef, Version>>> rangeVersions)
: sysInfo(sysInfo), rangeVersions(rangeVersions) {}
template <class Ar>
void serialize(Ar& ar) {
serializer(ar, sysInfo, rangeVersions, reply);
}
std::string toString() const {
std::stringstream ss;
ss << "RestoreSysInfoRequest "
<< "rangeVersions.size:" << rangeVersions.size();
return ss.str();
}
};
struct RestoreSamplesRequest : TimedRequest {
constexpr static FileIdentifier file_identifier = 10751035;
UID id; // deduplicate data
int batchIndex;
SampledMutationsVec samples; // sampled mutations
ReplyPromise<RestoreCommonReply> reply;
RestoreSamplesRequest() = default;
explicit RestoreSamplesRequest(UID id, int batchIndex, SampledMutationsVec samples)
: id(id), batchIndex(batchIndex), samples(samples) {}
template <class Ar>
void serialize(Ar& ar) {
serializer(ar, id, batchIndex, samples, reply);
}
std::string toString() const {
std::stringstream ss;
ss << "ID:" << id.toString() << " BatchIndex:" << batchIndex << " samples:" << samples.size();
return ss.str();
}
};
struct RestoreLoadFileReply : TimedRequest {
constexpr static FileIdentifier file_identifier = 523470;
LoadingParam param;
bool isDuplicated; // true if loader thinks the request is a duplicated one
RestoreLoadFileReply() = default;
explicit RestoreLoadFileReply(LoadingParam param, bool isDuplicated) : param(param), isDuplicated(isDuplicated) {}
template <class Ar>
void serialize(Ar& ar) {
serializer(ar, param, isDuplicated);
}
std::string toString() const {
std::stringstream ss;
ss << "LoadingParam:" << param.toString() << " isDuplicated:" << isDuplicated;
return ss.str();
}
};
// Sample_Range_File and Assign_Loader_Range_File, Assign_Loader_Log_File
struct RestoreLoadFileRequest : TimedRequest {
constexpr static FileIdentifier file_identifier = 9780148;
int batchIndex;
LoadingParam param;
ReplyPromise<RestoreLoadFileReply> reply;
RestoreLoadFileRequest() = default;
explicit RestoreLoadFileRequest(int batchIndex, LoadingParam& param) : batchIndex(batchIndex), param(param){};
bool operator<(RestoreLoadFileRequest const& rhs) const { return batchIndex > rhs.batchIndex; }
template <class Ar>
void serialize(Ar& ar) {
serializer(ar, batchIndex, param, reply);
}
std::string toString() const {
std::stringstream ss;
ss << "RestoreLoadFileRequest batchIndex:" << batchIndex << " param:" << param.toString();
return ss.str();
}
};
struct RestoreSendMutationsToAppliersRequest : TimedRequest {
constexpr static FileIdentifier file_identifier = 1718441;
int batchIndex; // version batch index
std::map<Key, UID> rangeToApplier;
bool useRangeFile; // Send mutations parsed from range file?
ReplyPromise<RestoreCommonReply> reply;
RestoreSendMutationsToAppliersRequest() = default;
explicit RestoreSendMutationsToAppliersRequest(int batchIndex, std::map<Key, UID> rangeToApplier, bool useRangeFile)
: batchIndex(batchIndex), rangeToApplier(rangeToApplier), useRangeFile(useRangeFile) {}
bool operator<(RestoreSendMutationsToAppliersRequest const& rhs) const { return batchIndex > rhs.batchIndex; }
template <class Ar>
void serialize(Ar& ar) {
serializer(ar, batchIndex, rangeToApplier, useRangeFile, reply);
}
std::string toString() const {
std::stringstream ss;
ss << "RestoreSendMutationsToAppliersRequest batchIndex:" << batchIndex
<< " keyToAppliers.size:" << rangeToApplier.size() << " useRangeFile:" << useRangeFile;
return ss.str();
}
};
struct RestoreSendVersionedMutationsRequest : TimedRequest {
constexpr static FileIdentifier file_identifier = 2655701;
int batchIndex; // version batch index
RestoreAsset asset; // Unique identifier for the current restore asset
Version msgIndex; // Monitonically increasing index of mutation messages
bool isRangeFile;
VersionedMutationsVec versionedMutations; // Versioned mutations may be at different versions parsed by one loader
ReplyPromise<RestoreCommonReply> reply;
RestoreSendVersionedMutationsRequest() = default;
explicit RestoreSendVersionedMutationsRequest(int batchIndex,
const RestoreAsset& asset,
Version msgIndex,
bool isRangeFile,
VersionedMutationsVec versionedMutations)
: batchIndex(batchIndex), asset(asset), msgIndex(msgIndex), isRangeFile(isRangeFile),
versionedMutations(versionedMutations) {}
std::string toString() const {
std::stringstream ss;
ss << "VersionBatchIndex:" << batchIndex << " msgIndex:" << msgIndex << " isRangeFile:" << isRangeFile
<< " versionedMutations.size:" << versionedMutations.size() << " RestoreAsset:" << asset.toString();
return ss.str();
}
template <class Ar>
void serialize(Ar& ar) {
serializer(ar, batchIndex, asset, msgIndex, isRangeFile, versionedMutations, reply);
}
};
struct RestoreVersionBatchRequest : TimedRequest {
constexpr static FileIdentifier file_identifier = 13337457;
int batchIndex;
ReplyPromise<RestoreCommonReply> reply;
RestoreVersionBatchRequest() = default;
explicit RestoreVersionBatchRequest(int batchIndex) : batchIndex(batchIndex) {}
template <class Ar>
void serialize(Ar& ar) {
serializer(ar, batchIndex, reply);
}
std::string toString() const {
std::stringstream ss;
ss << "RestoreVersionBatchRequest batchIndex:" << batchIndex;
return ss.str();
}
};
struct RestoreFinishRequest : TimedRequest {
constexpr static FileIdentifier file_identifier = 13018413;
bool terminate; // role exits if terminate = true
ReplyPromise<RestoreCommonReply> reply;
RestoreFinishRequest() = default;
explicit RestoreFinishRequest(bool terminate) : terminate(terminate) {}
template <class Ar>
void serialize(Ar& ar) {
serializer(ar, terminate, reply);
}
std::string toString() const {
std::stringstream ss;
ss << "RestoreFinishRequest terminate:" << terminate;
return ss.str();
}
};
struct RestoreUpdateRateReply : TimedRequest {
constexpr static FileIdentifier file_identifier = 13018414;
UID id;
double remainMB; // remaining data in MB to write to DB;
RestoreUpdateRateReply() = default;
explicit RestoreUpdateRateReply(UID id, double remainMB) : id(id), remainMB(remainMB) {}
std::string toString() const {
std::stringstream ss;
ss << "RestoreUpdateRateReply NodeID:" << id.toString() << " remainMB:" << remainMB;
return ss.str();
}
template <class Ar>
void serialize(Ar& ar) {
serializer(ar, id, remainMB);
}
};
struct RestoreUpdateRateRequest : TimedRequest {
constexpr static FileIdentifier file_identifier = 13018415;
int batchIndex;
double writeMB;
ReplyPromise<RestoreUpdateRateReply> reply;
RestoreUpdateRateRequest() = default;
explicit RestoreUpdateRateRequest(int batchIndex, double writeMB) : batchIndex(batchIndex), writeMB(writeMB) {}
template <class Ar>
void serialize(Ar& ar) {
serializer(ar, batchIndex, writeMB, reply);
}
std::string toString() const {
std::stringstream ss;
ss << "RestoreUpdateRateRequest batchIndex:" << batchIndex << " writeMB:" << writeMB;
return ss.str();
}
};
std::string getRoleStr(RestoreRole role);
////--- Interface functions
ACTOR Future<Void> _restoreWorker(Database cx, LocalityData locality);
ACTOR Future<Void> restoreWorker(Reference<ClusterConnectionFile> ccf, LocalityData locality, std::string coordFolder);
extern const KeyRef restoreLeaderKey;
extern const KeyRangeRef restoreWorkersKeys;
extern const KeyRef restoreStatusKey; // To be used when we measure fast restore performance
extern const KeyRangeRef restoreRequestKeys;
extern const KeyRangeRef restoreApplierKeys;
extern const KeyRef restoreApplierTxnValue;
const Key restoreApplierKeyFor(UID const& applierID, int64_t batchIndex, Version version);
std::tuple<UID, int64_t, Version> decodeRestoreApplierKey(ValueRef const& key);
const Key restoreWorkerKeyFor(UID const& workerID);
const Value restoreWorkerInterfaceValue(RestoreWorkerInterface const& server);
RestoreWorkerInterface decodeRestoreWorkerInterfaceValue(ValueRef const& value);
Version decodeRestoreRequestDoneVersionValue(ValueRef const& value);
RestoreRequest decodeRestoreRequestValue(ValueRef const& value);
const Key restoreStatusKeyFor(StringRef statusType);
const Value restoreStatusValue(double val);
Value restoreRequestDoneVersionValue(Version readVersion);
#include "flow/unactorcompiler.h"
#endif
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