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foundationdb/fdbserver/RestoreLoader.actor.cpp

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/*
* RestoreLoader.actor.cpp
*
* This source file is part of the FoundationDB open source project
*
* Copyright 2013-2020 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 implements the functions and actors used by the RestoreLoader role.
// The RestoreLoader role starts with the restoreLoaderCore actor
#include "flow/UnitTest.h"
#include "fdbclient/BackupContainer.h"
#include "fdbclient/BackupAgent.actor.h"
#include "fdbserver/RestoreLoader.actor.h"
#include "fdbserver/RestoreRoleCommon.actor.h"
#include "flow/actorcompiler.h" // This must be the last #include.
// SerializedMutationListMap: Buffered mutation lists from data blocks in log files
// Key is the signature/version of the mutation list; Value.first is the mutation list which may come from multiple
// data blocks of log file; Value.second is the largest part number of the mutation list, which is used to sanity check
// the data blocks for the same mutation list are concatenated in increasing order of part number.
typedef std::map<Standalone<StringRef>, std::pair<Standalone<StringRef>, uint32_t>> SerializedMutationListMap;
std::vector<UID> getApplierIDs(std::map<Key, UID>& rangeToApplier);
void splitMutation(std::map<Key, UID>* pRangeToApplier, MutationRef m, Arena& mvector_arena,
VectorRef<MutationRef>& mvector, Arena& nodeIDs_arena, VectorRef<UID>& nodeIDs);
void _parseSerializedMutation(KeyRangeMap<Version>* pRangeVersions,
std::map<LoadingParam, VersionedMutationsMap>::iterator kvOpsIter,
SerializedMutationListMap* mutationMap,
std::map<LoadingParam, MutationsVec>::iterator samplesIter, LoaderCounters* cc,
const RestoreAsset& asset);
void handleRestoreSysInfoRequest(const RestoreSysInfoRequest& req, Reference<RestoreLoaderData> self);
ACTOR Future<Void> handleLoadFileRequest(RestoreLoadFileRequest req, Reference<RestoreLoaderData> self);
ACTOR Future<Void> handleSendMutationsRequest(RestoreSendMutationsToAppliersRequest req,
Reference<RestoreLoaderData> self);
ACTOR Future<Void> sendMutationsToApplier(VersionedMutationsMap* pkvOps, int batchIndex, RestoreAsset asset,
bool isRangeFile, std::map<Key, UID>* pRangeToApplier,
std::map<UID, RestoreApplierInterface>* pApplierInterfaces);
ACTOR static Future<Void> _parseLogFileToMutationsOnLoader(NotifiedVersion* pProcessedFileOffset,
SerializedMutationListMap* mutationMap,
Reference<IBackupContainer> bc, RestoreAsset asset);
ACTOR static Future<Void> _parseRangeFileToMutationsOnLoader(
std::map<LoadingParam, VersionedMutationsMap>::iterator kvOpsIter,
std::map<LoadingParam, MutationsVec>::iterator samplesIter, LoaderCounters* cc, Reference<IBackupContainer> bc,
Version version, RestoreAsset asset);
ACTOR Future<Void> handleFinishVersionBatchRequest(RestoreVersionBatchRequest req, Reference<RestoreLoaderData> self);
ACTOR Future<Void> restoreLoaderCore(RestoreLoaderInterface loaderInterf, int nodeIndex, Database cx) {
state Reference<RestoreLoaderData> self =
Reference<RestoreLoaderData>(new RestoreLoaderData(loaderInterf.id(), nodeIndex));
state ActorCollection actors(false);
state Future<Void> exitRole = Never();
state Future<Void> updateProcessStatsTimer = delay(SERVER_KNOBS->FASTRESTORE_UPDATE_PROCESS_STATS_INTERVAL);
actors.add(traceProcessMetrics(self, "RestoreLoader"));
loop {
state std::string requestTypeStr = "[Init]";
try {
choose {
when(RestoreSimpleRequest req = waitNext(loaderInterf.heartbeat.getFuture())) {
requestTypeStr = "heartbeat";
actors.add(handleHeartbeat(req, loaderInterf.id()));
}
when(RestoreSysInfoRequest req = waitNext(loaderInterf.updateRestoreSysInfo.getFuture())) {
requestTypeStr = "updateRestoreSysInfo";
handleRestoreSysInfoRequest(req, self);
}
when(RestoreLoadFileRequest req = waitNext(loaderInterf.loadFile.getFuture())) {
requestTypeStr = "loadFile";
self->initBackupContainer(req.param.url);
actors.add(handleLoadFileRequest(req, self));
}
when(RestoreSendMutationsToAppliersRequest req = waitNext(loaderInterf.sendMutations.getFuture())) {
requestTypeStr = "sendMutations";
actors.add(handleSendMutationsRequest(req, self));
}
when(RestoreVersionBatchRequest req = waitNext(loaderInterf.initVersionBatch.getFuture())) {
requestTypeStr = "initVersionBatch";
actors.add(handleInitVersionBatchRequest(req, self));
}
when(RestoreVersionBatchRequest req = waitNext(loaderInterf.finishVersionBatch.getFuture())) {
requestTypeStr = "finishVersionBatch";
actors.add(handleFinishVersionBatchRequest(req, self));
}
when(RestoreFinishRequest req = waitNext(loaderInterf.finishRestore.getFuture())) {
requestTypeStr = "finishRestore";
handleFinishRestoreRequest(req, self);
if (req.terminate) {
exitRole = Void();
}
}
when(wait(updateProcessStatsTimer)) {
updateProcessStats(self);
updateProcessStatsTimer = delay(SERVER_KNOBS->FASTRESTORE_UPDATE_PROCESS_STATS_INTERVAL);
}
when(wait(exitRole)) {
TraceEvent("FastRestoreLoaderCoreExitRole", self->id());
break;
}
}
} catch (Error& e) {
TraceEvent(SevWarn, "FastRestoreLoader", self->id()).detail("RequestType", requestTypeStr).error(e, true);
break;
}
}
return Void();
}
static inline bool _logMutationTooOld(KeyRangeMap<Version>* pRangeVersions, KeyRangeRef keyRange, Version v) {
auto ranges = pRangeVersions->intersectingRanges(keyRange);
Version minVersion = MAX_VERSION;
for (auto r = ranges.begin(); r != ranges.end(); ++r) {
minVersion = std::min(minVersion, r->value());
}
return minVersion >= v;
}
static inline bool logMutationTooOld(KeyRangeMap<Version>* pRangeVersions, MutationRef mutation, Version v) {
return isRangeMutation(mutation)
? _logMutationTooOld(pRangeVersions, KeyRangeRef(mutation.param1, mutation.param2), v)
: _logMutationTooOld(pRangeVersions, KeyRangeRef(singleKeyRange(mutation.param1)), v);
}
// Assume: Only update the local data if it (applierInterf) has not been set
void handleRestoreSysInfoRequest(const RestoreSysInfoRequest& req, Reference<RestoreLoaderData> self) {
TraceEvent("FastRestoreLoader", self->id()).detail("HandleRestoreSysInfoRequest", self->id());
ASSERT(self.isValid());
// The loader has received the appliers interfaces
if (!self->appliersInterf.empty()) {
req.reply.send(RestoreCommonReply(self->id()));
return;
}
self->appliersInterf = req.sysInfo.appliers;
// Update rangeVersions
ASSERT(req.rangeVersions.size() > 0); // At least the min version of range files will be used
ASSERT(self->rangeVersions.size() == 1); // rangeVersions has not been set
for (auto rv = req.rangeVersions.begin(); rv != req.rangeVersions.end(); ++rv) {
self->rangeVersions.insert(rv->first, rv->second);
}
// Debug message for range version in each loader
auto ranges = self->rangeVersions.ranges();
int i = 0;
for (auto r = ranges.begin(); r != ranges.end(); ++r) {
TraceEvent("FastRestoreLoader", self->id())
.detail("RangeIndex", i++)
.detail("RangeBegin", r->begin())
.detail("RangeEnd", r->end())
.detail("Version", r->value());
}
req.reply.send(RestoreCommonReply(self->id()));
}
// Parse a data block in a partitioned mutation log file and store mutations
// into "kvOpsIter" and samples into "samplesIter".
ACTOR static Future<Void> _parsePartitionedLogFileOnLoader(
KeyRangeMap<Version>* pRangeVersions, NotifiedVersion* processedFileOffset,
std::map<LoadingParam, VersionedMutationsMap>::iterator kvOpsIter,
std::map<LoadingParam, MutationsVec>::iterator samplesIter, LoaderCounters* cc, Reference<IBackupContainer> bc,
RestoreAsset asset) {
state Standalone<StringRef> buf = makeString(asset.len);
state Reference<IAsyncFile> file = wait(bc->readFile(asset.filename));
int rLen = wait(file->read(mutateString(buf), asset.len, asset.offset));
if (rLen != asset.len) throw restore_bad_read();
TraceEvent("FastRestoreLoader")
.detail("DecodingLogFile", asset.filename)
.detail("Offset", asset.offset)
.detail("Length", asset.len);
// Ensure data blocks in the same file are processed in order
wait(processedFileOffset->whenAtLeast(asset.offset));
ASSERT(processedFileOffset->get() == asset.offset);
StringRefReader reader(buf, restore_corrupted_data());
try {
// Read block header
if (reader.consume<int32_t>() != PARTITIONED_MLOG_VERSION) throw restore_unsupported_file_version();
VersionedMutationsMap& kvOps = kvOpsIter->second;
while (1) {
// If eof reached or first key len bytes is 0xFF then end of block was reached.
if (reader.eof() || *reader.rptr == 0xFF) break;
// Deserialize messages written in saveMutationsToFile().
LogMessageVersion msgVersion;
msgVersion.version = reader.consumeNetworkUInt64();
msgVersion.sub = reader.consumeNetworkUInt32();
int msgSize = reader.consumeNetworkInt32();
const uint8_t* message = reader.consume(msgSize);
// Skip mutations out of the version range
if (!asset.isInVersionRange(msgVersion.version)) continue;
VersionedMutationsMap::iterator it;
bool inserted;
std::tie(it, inserted) = kvOps.emplace(msgVersion, MutationsVec());
ASSERT(inserted);
ArenaReader rd(buf.arena(), StringRef(message, msgSize), AssumeVersion(currentProtocolVersion));
MutationRef mutation;
rd >> mutation;
// Skip mutation whose commitVesion < range kv's version
if (logMutationTooOld(pRangeVersions, mutation, msgVersion.version)) {
cc->oldLogMutations += 1;
continue;
}
// Should this mutation be skipped?
if (mutation.param1 >= asset.range.end ||
(isRangeMutation(mutation) && mutation.param2 < asset.range.begin) ||
(!isRangeMutation(mutation) && mutation.param1 < asset.range.begin)) {
continue;
}
// Only apply mutation within the asset.range
if (isRangeMutation(mutation)) {
mutation.param1 = mutation.param1 >= asset.range.begin ? mutation.param1 : asset.range.begin;
mutation.param2 = mutation.param2 < asset.range.end ? mutation.param2 : asset.range.end;
}
TraceEvent(SevFRMutationInfo, "FastRestoreDecodePartitionedLogFile")
.detail("CommitVersion", msgVersion.toString())
.detail("ParsedMutation", mutation.toString());
it->second.push_back_deep(it->second.arena(), mutation);
// Sampling (FASTRESTORE_SAMPLING_PERCENT%) data
if (deterministicRandom()->random01() * 100 < SERVER_KNOBS->FASTRESTORE_SAMPLING_PERCENT) {
samplesIter->second.push_back_deep(samplesIter->second.arena(), mutation);
}
}
// Make sure any remaining bytes in the block are 0xFF
for (auto b : reader.remainder()) {
if (b != 0xFF) throw restore_corrupted_data_padding();
}
} catch (Error& e) {
TraceEvent(SevWarn, "FileRestoreCorruptLogFileBlock")
.error(e)
.detail("Filename", file->getFilename())
.detail("BlockOffset", asset.offset)
.detail("BlockLen", asset.len);
throw;
}
processedFileOffset->set(asset.offset + asset.len);
return Void();
}
ACTOR Future<Void> _processLoadingParam(KeyRangeMap<Version>* pRangeVersions, LoadingParam param,
Reference<LoaderBatchData> batchData, UID loaderID,
Reference<IBackupContainer> bc) {
// Temporary data structure for parsing log files into (version, <K, V, mutationType>)
// Must use StandAlone to save mutations, otherwise, the mutationref memory will be corrupted
// mutationMap: Key is the unique identifier for a batch of mutation logs at the same version
state SerializedMutationListMap mutationMap;
state NotifiedVersion processedFileOffset(0);
state std::vector<Future<Void>> fileParserFutures;
state std::map<LoadingParam, VersionedMutationsMap>::iterator kvOpsPerLPIter = batchData->kvOpsPerLP.end();
state std::map<LoadingParam, MutationsVec>::iterator samplesIter = batchData->sampleMutations.end();
// Q: How to record the param's fields inside LoadingParam Refer to storageMetrics
TraceEvent("FastRestoreLoaderProcessLoadingParam", loaderID).detail("LoadingParam", param.toString());
ASSERT(param.blockSize > 0);
ASSERT(param.asset.offset % param.blockSize == 0); // Parse file must be at block boundary.
ASSERT(batchData->kvOpsPerLP.find(param) == batchData->kvOpsPerLP.end());
// NOTE: map's iterator is guaranteed to be stable, but pointer may not.
bool inserted;
std::tie(kvOpsPerLPIter, inserted) = batchData->kvOpsPerLP.emplace(param, VersionedMutationsMap());
ASSERT(inserted);
std::tie(samplesIter, inserted) = batchData->sampleMutations.emplace(param, MutationsVec());
ASSERT(inserted);
for (int64_t j = param.asset.offset; j < param.asset.len; j += param.blockSize) {
RestoreAsset subAsset = param.asset;
subAsset.offset = j;
subAsset.len = std::min<int64_t>(param.blockSize, param.asset.len - j);
if (param.isRangeFile) {
fileParserFutures.push_back(_parseRangeFileToMutationsOnLoader(
kvOpsPerLPIter, samplesIter, &batchData->counters, bc, param.rangeVersion.get(), subAsset));
} else {
// TODO: Sanity check the log file's range is overlapped with the restored version range
if (param.isPartitionedLog()) {
fileParserFutures.push_back(_parsePartitionedLogFileOnLoader(pRangeVersions, &processedFileOffset,
kvOpsPerLPIter, samplesIter,
&batchData->counters, bc, subAsset));
} else {
fileParserFutures.push_back(
_parseLogFileToMutationsOnLoader(&processedFileOffset, &mutationMap, bc, subAsset));
}
}
}
wait(waitForAll(fileParserFutures));
if (!param.isRangeFile && !param.isPartitionedLog()) {
_parseSerializedMutation(pRangeVersions, kvOpsPerLPIter, &mutationMap, samplesIter, &batchData->counters,
param.asset);
}
TraceEvent("FastRestoreLoaderProcessLoadingParamDone", loaderID).detail("LoadingParam", param.toString());
return Void();
}
// A loader can process multiple RestoreLoadFileRequest in parallel.
ACTOR Future<Void> handleLoadFileRequest(RestoreLoadFileRequest req, Reference<RestoreLoaderData> self) {
state Reference<LoaderBatchData> batchData = self->batch[req.batchIndex];
state bool isDuplicated = true;
ASSERT(batchData.isValid());
bool paramExist = batchData->processedFileParams.find(req.param) != batchData->processedFileParams.end();
bool isReady = paramExist ? batchData->processedFileParams[req.param].isReady() : false;
TraceEvent("FastRestoreLoaderPhaseLoadFile", self->id())
.detail("BatchIndex", req.batchIndex)
.detail("ProcessLoadParam", req.param.toString())
.detail("NotProcessed", !paramExist)
.detail("Processed", isReady)
.detail("CurrentMemory", getSystemStatistics().processMemory);
// Loader destroy batchData once the batch finishes and self->finishedBatch.set(req.batchIndex);
ASSERT(self->finishedBatch.get() < req.batchIndex);
wait(isSchedulable(self, req.batchIndex, __FUNCTION__));
if (batchData->processedFileParams.find(req.param) == batchData->processedFileParams.end()) {
TraceEvent("FastRestoreLoadFile", self->id())
.detail("BatchIndex", req.batchIndex)
.detail("ProcessLoadParam", req.param.toString());
ASSERT(batchData->sampleMutations.find(req.param) == batchData->sampleMutations.end());
batchData->processedFileParams[req.param] =
_processLoadingParam(&self->rangeVersions, req.param, batchData, self->id(), self->bc);
isDuplicated = false;
} else {
TraceEvent("FastRestoreLoadFile", self->id())
.detail("BatchIndex", req.batchIndex)
.detail("WaitOnProcessLoadParam", req.param.toString());
}
auto it = batchData->processedFileParams.find(req.param);
ASSERT(it != batchData->processedFileParams.end());
wait(it->second); // wait on the processing of the req.param.
req.reply.send(RestoreLoadFileReply(req.param, batchData->sampleMutations[req.param], isDuplicated));
TraceEvent("FastRestoreLoaderPhaseLoadFileDone", self->id())
.detail("BatchIndex", req.batchIndex)
.detail("ProcessLoadParam", req.param.toString());
// TODO: clear self->sampleMutations[req.param] memory to save memory on loader
return Void();
}
// Send buffered mutations to appliers.
// Do not need to block on low memory usage because this actor should not increase memory usage.
ACTOR Future<Void> handleSendMutationsRequest(RestoreSendMutationsToAppliersRequest req,
Reference<RestoreLoaderData> self) {
state Reference<LoaderBatchData> batchData = self->batch[req.batchIndex];
state Reference<LoaderBatchStatus> batchStatus = self->status[req.batchIndex];
state bool isDuplicated = true;
TraceEvent("FastRestoreLoaderPhaseSendMutations", self->id())
.detail("BatchIndex", req.batchIndex)
.detail("UseRangeFile", req.useRangeFile)
.detail("LoaderSendStatus", batchStatus->toString());
// Loader destroy batchData once the batch finishes and self->finishedBatch.set(req.batchIndex);
ASSERT(self->finishedBatch.get() < req.batchIndex);
// Ensure each file is sent exactly once by using batchStatus->sendAllLogs and batchStatus->sendAllRanges
if (!req.useRangeFile) {
if (!batchStatus->sendAllLogs.present()) { // Has not sent
batchStatus->sendAllLogs = Never();
isDuplicated = false;
TraceEvent(SevInfo, "FastRestoreSendMutationsProcessLogRequest", self->id())
.detail("BatchIndex", req.batchIndex)
.detail("UseRangeFile", req.useRangeFile);
} else if (!batchStatus->sendAllLogs.get().isReady()) { // In the process of sending
TraceEvent(SevDebug, "FastRestoreSendMutationsWaitDuplicateLogRequest", self->id())
.detail("BatchIndex", req.batchIndex)
.detail("UseRangeFile", req.useRangeFile);
wait(batchStatus->sendAllLogs.get());
} else { // Already sent
TraceEvent(SevDebug, "FastRestoreSendMutationsSkipDuplicateLogRequest", self->id())
.detail("BatchIndex", req.batchIndex)
.detail("UseRangeFile", req.useRangeFile);
}
} else {
if (!batchStatus->sendAllRanges.present()) {
batchStatus->sendAllRanges = Never();
isDuplicated = false;
TraceEvent(SevInfo, "FastRestoreSendMutationsProcessRangeRequest", self->id())
.detail("BatchIndex", req.batchIndex)
.detail("UseRangeFile", req.useRangeFile);
} else if (!batchStatus->sendAllRanges.get().isReady()) {
TraceEvent(SevDebug, "FastRestoreSendMutationsWaitDuplicateRangeRequest", self->id())
.detail("BatchIndex", req.batchIndex)
.detail("UseRangeFile", req.useRangeFile);
wait(batchStatus->sendAllRanges.get());
} else {
TraceEvent(SevDebug, "FastRestoreSendMutationsSkipDuplicateRangeRequest", self->id())
.detail("BatchIndex", req.batchIndex)
.detail("UseRangeFile", req.useRangeFile);
}
}
if (!isDuplicated) {
vector<Future<Void>> fSendMutations;
batchData->rangeToApplier = req.rangeToApplier;
for (auto& [loadParam, kvOps] : batchData->kvOpsPerLP) {
if (loadParam.isRangeFile == req.useRangeFile) {
// Send the parsed mutation to applier who will apply the mutation to DB
fSendMutations.push_back(sendMutationsToApplier(&kvOps, req.batchIndex, loadParam.asset,
loadParam.isRangeFile, &batchData->rangeToApplier,
&self->appliersInterf));
}
}
wait(waitForAll(fSendMutations));
if (req.useRangeFile) {
batchStatus->sendAllRanges = Void(); // Finish sending kvs parsed from range files
} else {
batchStatus->sendAllLogs = Void();
}
}
TraceEvent("FastRestoreLoaderPhaseSendMutationsDone", self->id())
.detail("BatchIndex", req.batchIndex)
.detail("UseRangeFile", req.useRangeFile)
.detail("LoaderSendStatus", batchStatus->toString());
req.reply.send(RestoreCommonReply(self->id(), isDuplicated));
return Void();
}
// Assume: kvOps data are from the same RestoreAsset.
// Input: pkvOps: versioned kv mutation for the asset in the version batch (batchIndex)
// isRangeFile: is pkvOps from range file? Let receiver (applier) know if the mutation is log mutation;
// pRangeToApplier: range to applierID mapping, deciding which applier is responsible for which range
// pApplierInterfaces: applier interfaces to send the mutations to
ACTOR Future<Void> sendMutationsToApplier(VersionedMutationsMap* pkvOps, int batchIndex, RestoreAsset asset,
bool isRangeFile, std::map<Key, UID>* pRangeToApplier,
std::map<UID, RestoreApplierInterface>* pApplierInterfaces) {
state VersionedMutationsMap& kvOps = *pkvOps;
state VersionedMutationsMap::iterator kvOp = kvOps.begin();
state int kvCount = 0;
state int splitMutationIndex = 0;
state Version msgIndex = 1; // Monotonically increased index for send message, must start at 1
state std::vector<UID> applierIDs = getApplierIDs(*pRangeToApplier);
state double msgSize = 0; // size of mutations in the message
TraceEvent("FastRestoreLoaderSendMutationToApplier")
.detail("IsRangeFile", isRangeFile)
.detail("EndVersion", asset.endVersion)
.detail("RestoreAsset", asset.toString());
// There should be no mutation at asset.endVersion version because it is exclusive
if (kvOps.lower_bound(LogMessageVersion(asset.endVersion)) != kvOps.end()) {
TraceEvent(SevError, "FastRestoreLoaderSendMutationToApplier")
.detail("BatchIndex", batchIndex)
.detail("RestoreAsset", asset.toString())
.detail("IsRangeFile", isRangeFile)
.detail("Data loss at version", asset.endVersion);
} else {
// Ensure there is a mutation request sent at endVersion, so that applier can advance its notifiedVersion
kvOps[LogMessageVersion(asset.endVersion)] = MutationsVec(); // Empty mutation vector will be handled by applier
}
splitMutationIndex = 0;
kvCount = 0;
// applierVersionedMutationsBuffer is the mutation-and-its-version vector to be sent to each applier
state std::map<UID, VersionedMutationsVec> applierVersionedMutationsBuffer;
state int mIndex = 0;
state LogMessageVersion commitVersion;
state std::vector<Future<Void>> fSends;
for (auto& applierID : applierIDs) {
applierVersionedMutationsBuffer[applierID] = VersionedMutationsVec();
}
for (kvOp = kvOps.begin(); kvOp != kvOps.end(); kvOp++) {
commitVersion = kvOp->first;
ASSERT(commitVersion.version >= asset.beginVersion);
ASSERT(commitVersion.version <= asset.endVersion); // endVersion is an empty commit to ensure progress
for (mIndex = 0; mIndex < kvOp->second.size(); mIndex++) {
MutationRef& kvm = kvOp->second[mIndex];
// Send the mutation to applier
if (isRangeMutation(kvm)) {
MutationsVec mvector;
Standalone<VectorRef<UID>> nodeIDs;
// Because using a vector of mutations causes overhead, and the range mutation should happen rarely;
// We handle the range mutation and key mutation differently for the benefit of avoiding memory copy
splitMutation(pRangeToApplier, kvm, mvector.arena(), mvector.contents(), nodeIDs.arena(),
nodeIDs.contents());
ASSERT(mvector.size() == nodeIDs.size());
if (debugMutation("RestoreLoader", commitVersion.version, kvm)) {
TraceEvent e("DebugSplit");
int i = 0;
for (auto& [key, uid] : *pRangeToApplier) {
e.detail(format("Range%d", i).c_str(), printable(key))
.detail(format("UID%d", i).c_str(), uid.toString());
i++;
}
}
for (splitMutationIndex = 0; splitMutationIndex < mvector.size(); splitMutationIndex++) {
MutationRef mutation = mvector[splitMutationIndex];
UID applierID = nodeIDs[splitMutationIndex];
if (debugMutation("RestoreLoader", commitVersion.version, mutation)) {
TraceEvent("SplittedMutation")
.detail("Version", commitVersion.toString())
.detail("Mutation", mutation.toString());
}
// CAREFUL: The splitted mutations' lifetime is shorter than the for-loop
// Must use deep copy for splitted mutations
applierVersionedMutationsBuffer[applierID].push_back_deep(
applierVersionedMutationsBuffer[applierID].arena(), VersionedMutation(mutation, commitVersion));
msgSize += mutation.expectedSize();
kvCount++;
}
} else { // mutation operates on a particular key
std::map<Key, UID>::iterator itlow = pRangeToApplier->upper_bound(kvm.param1);
--itlow; // make sure itlow->first <= m.param1
ASSERT(itlow->first <= kvm.param1);
UID applierID = itlow->second;
kvCount++;
if (debugMutation("RestoreLoader", commitVersion.version, kvm)) {
TraceEvent("SendMutation")
.detail("Applier", applierID)
.detail("Version", commitVersion.toString())
.detail("Mutation", kvm.toString());
}
// kvm data is saved in pkvOps in batchData, so shallow copy is ok here.
applierVersionedMutationsBuffer[applierID].push_back(applierVersionedMutationsBuffer[applierID].arena(),
VersionedMutation(kvm, commitVersion));
msgSize += kvm.expectedSize();
}
// Batch mutations at multiple versions up to FASTRESTORE_LOADER_SEND_MUTATION_MSG_BYTES size
// to improve bandwidth from a loader to appliers
if (msgSize >= SERVER_KNOBS->FASTRESTORE_LOADER_SEND_MUTATION_MSG_BYTES) {
std::vector<std::pair<UID, RestoreSendVersionedMutationsRequest>> requests;
for (const UID& applierID : applierIDs) {
requests.emplace_back(
applierID, RestoreSendVersionedMutationsRequest(batchIndex, asset, msgIndex, isRangeFile,
applierVersionedMutationsBuffer[applierID]));
}
TraceEvent(SevDebug, "FastRestoreLoaderSendMutationToApplier")
.detail("MessageIndex", msgIndex)
.detail("RestoreAsset", asset.toString())
.detail("Requests", requests.size());
fSends.push_back(sendBatchRequests(&RestoreApplierInterface::sendMutationVector, *pApplierInterfaces,
requests, TaskPriority::RestoreLoaderSendMutations));
msgIndex++;
msgSize = 0;
for (auto& applierID : applierIDs) {
applierVersionedMutationsBuffer[applierID] = VersionedMutationsVec();
}
}
} // Mutations at the same LogMessageVersion
} // all versions of mutations in the same file
// Send the remaining mutations in the applierMutationsBuffer
if (msgSize > 0) {
// TODO: Sanity check each asset has been received exactly once!
std::vector<std::pair<UID, RestoreSendVersionedMutationsRequest>> requests;
for (const UID& applierID : applierIDs) {
requests.emplace_back(applierID,
RestoreSendVersionedMutationsRequest(batchIndex, asset, msgIndex, isRangeFile,
applierVersionedMutationsBuffer[applierID]));
}
TraceEvent(SevDebug, "FastRestoreLoaderSendMutationToApplier")
.detail("MessageIndex", msgIndex)
.detail("RestoreAsset", asset.toString())
.detail("Requests", requests.size());
fSends.push_back(sendBatchRequests(&RestoreApplierInterface::sendMutationVector, *pApplierInterfaces, requests,
TaskPriority::RestoreLoaderSendMutations));
}
wait(waitForAll(fSends));
kvOps = VersionedMutationsMap(); // Free memory for parsed mutations at the restore asset.
TraceEvent("FastRestoreLoaderSendMutationToAppliers")
.detail("BatchIndex", batchIndex)
.detail("RestoreAsset", asset.toString())
.detail("Mutations", kvCount);
return Void();
}
void splitMutation(std::map<Key, UID>* pRangeToApplier, MutationRef m, Arena& mvector_arena,
VectorRef<MutationRef>& mvector, Arena& nodeIDs_arena, VectorRef<UID>& nodeIDs) {
TraceEvent(SevDebug, "FastRestoreSplitMutation").detail("Mutation", m.toString());
// mvector[i] should be mapped to nodeID[i]
ASSERT(mvector.empty());
ASSERT(nodeIDs.empty());
// key range [m->param1, m->param2)
std::map<Key, UID>::iterator itlow, itup; // we will return [itlow, itup)
itlow = pRangeToApplier->lower_bound(m.param1); // lower_bound returns the iterator that is >= m.param1
if (itlow == pRangeToApplier->end()) {
--itlow;
mvector.push_back_deep(mvector_arena, m);
nodeIDs.push_back(nodeIDs_arena, itlow->second);
return;
}
if (itlow->first > m.param1) {
if (itlow != pRangeToApplier->begin()) {
--itlow;
}
}
itup = pRangeToApplier->upper_bound(m.param2); // return rmap::end if no key is after m.param2.
ASSERT(itup == pRangeToApplier->end() || itup->first > m.param2);
std::map<Key, UID>::iterator itApplier;
while (itlow != itup) {
Standalone<MutationRef> curm; // current mutation
curm.type = m.type;
// The first split mutation should starts with m.first.
// The later ones should start with the rangeToApplier boundary.
if (m.param1 > itlow->first) {
curm.param1 = m.param1;
} else {
curm.param1 = itlow->first;
}
itApplier = itlow;
itlow++;
if (itlow == itup) {
ASSERT(m.param2 <= normalKeys.end);
curm.param2 = m.param2;
} else if (m.param2 < itlow->first) {
UNREACHABLE();
curm.param2 = m.param2;
} else {
curm.param2 = itlow->first;
}
ASSERT(curm.param1 <= curm.param2);
// itup > m.param2: (itup-1) may be out of mutation m's range
// Ensure the added mutations have overlap with mutation m
if (m.param1 < curm.param2 && m.param2 > curm.param1) {
mvector.push_back_deep(mvector_arena, curm);
nodeIDs.push_back(nodeIDs_arena, itApplier->second);
}
}
}
// key_input format:
// [logRangeMutation.first][hash_value_of_commit_version:1B][bigEndian64(commitVersion)][bigEndian32(part)]
// value_input: serialized binary of mutations at the same version
bool concatenateBackupMutationForLogFile(SerializedMutationListMap* pMutationMap, Standalone<StringRef> key_input,
Standalone<StringRef> val_input, const RestoreAsset& asset) {
SerializedMutationListMap& mutationMap = *pMutationMap;
const int key_prefix_len = sizeof(uint8_t) + sizeof(Version) + sizeof(uint32_t);
StringRefReader readerKey(key_input, restore_corrupted_data()); // read key_input!
int logRangeMutationFirstLength = key_input.size() - key_prefix_len;
bool concatenated = false;
ASSERT_WE_THINK(key_input.size() >= key_prefix_len);
if (logRangeMutationFirstLength > 0) {
// Strip out the [logRangeMutation.first]; otherwise, the following readerKey.consume will produce wrong value
readerKey.consume(logRangeMutationFirstLength);
}
readerKey.consume<uint8_t>(); // uint8_t hashValue = readerKey.consume<uint8_t>()
Version commitVersion = readerKey.consumeNetworkUInt64();
// Skip mutations not in [asset.beginVersion, asset.endVersion), which is what we are only processing right now
if (!asset.isInVersionRange(commitVersion)) {
return false;
}
uint32_t part = readerKey.consumeNetworkUInt32();
// Use commitVersion as id
Standalone<StringRef> id = StringRef((uint8_t*)&commitVersion, sizeof(Version));
auto it = mutationMap.find(id);
if (it == mutationMap.end()) {
mutationMap.emplace(id, std::make_pair(val_input, 0));
if (part != 0) {
TraceEvent(SevError, "FastRestoreLoader")
.detail("FirstPartNotZero", part)
.detail("KeyInput", getHexString(key_input));
}
} else { // Concatenate the val string with the same commitVersion
it->second.first =
it->second.first.contents().withSuffix(val_input.contents()); // Assign the new Areana to the map's value
auto& currentPart = it->second.second;
if (part != (currentPart + 1)) {
// Check if the same range or log file has been processed more than once!
TraceEvent(SevError, "FastRestoreLoader")
.detail("CurrentPart1", currentPart)
.detail("CurrentPart2", part)
.detail("KeyInput", getHexString(key_input))
.detail("Hint", "Check if the same range or log file has been processed more than once");
}
currentPart = part;
concatenated = true;
}
return concatenated;
}
// Parse the kv pair (version, serialized_mutation), which are the results parsed from log file, into
// (version, <K, V, mutationType>) pair;
// Put the parsed versioned mutations into *pkvOps.
//
// Input key: [commitVersion_of_the_mutation_batch:uint64_t];
// Input value: [includeVersion:uint64_t][val_length:uint32_t][encoded_list_of_mutations], where
// includeVersion is the serialized version in the batch commit. It is not the commitVersion in Input key.
//
// val_length is always equal to (val.size() - 12); otherwise,
// we may not get the entire mutation list for the version encoded_list_of_mutations:
// [mutation1][mutation2]...[mutationk], where
// a mutation is encoded as [type:uint32_t][keyLength:uint32_t][valueLength:uint32_t][keyContent][valueContent]
void _parseSerializedMutation(KeyRangeMap<Version>* pRangeVersions,
std::map<LoadingParam, VersionedMutationsMap>::iterator kvOpsIter,
SerializedMutationListMap* pmutationMap,
std::map<LoadingParam, MutationsVec>::iterator samplesIter, LoaderCounters* cc,
const RestoreAsset& asset) {
VersionedMutationsMap& kvOps = kvOpsIter->second;
MutationsVec& samples = samplesIter->second;
SerializedMutationListMap& mutationMap = *pmutationMap;
for (auto& m : mutationMap) {
StringRef k = m.first.contents();
StringRef val = m.second.first.contents();
StringRefReader kReader(k, restore_corrupted_data());
uint64_t commitVersion = kReader.consume<uint64_t>(); // Consume little Endian data
// We have already filter the commit not in [beginVersion, endVersion) when we concatenate kv pair in log file
ASSERT_WE_THINK(asset.isInVersionRange(commitVersion));
StringRefReader vReader(val, restore_corrupted_data());
vReader.consume<uint64_t>(); // Consume the includeVersion
// TODO(xumengpanda): verify the protocol version is compatible and raise error if needed
// Parse little endian value, confirmed it is correct!
uint32_t val_length_decoded = vReader.consume<uint32_t>();
ASSERT(val_length_decoded == val.size() - sizeof(uint64_t) - sizeof(uint32_t));
int sub = 0;
while (1) {
// stop when reach the end of the string
if (vReader.eof()) { //|| *reader.rptr == 0xFF
break;
}
uint32_t type = vReader.consume<uint32_t>();
uint32_t kLen = vReader.consume<uint32_t>();
uint32_t vLen = vReader.consume<uint32_t>();
const uint8_t* k = vReader.consume(kLen);
const uint8_t* v = vReader.consume(vLen);
MutationRef mutation((MutationRef::Type)type, KeyRef(k, kLen), KeyRef(v, vLen));
// Should this mutation be skipped?
// Skip mutation whose commitVesion < range kv's version
if (logMutationTooOld(pRangeVersions, mutation, commitVersion)) {
cc->oldLogMutations += 1;
continue;
}
if (mutation.param1 >= asset.range.end ||
(isRangeMutation(mutation) && mutation.param2 < asset.range.begin) ||
(!isRangeMutation(mutation) && mutation.param1 < asset.range.begin)) {
continue;
}
// Only apply mutation within the asset.range
if (isRangeMutation(mutation)) {
mutation.param1 = mutation.param1 >= asset.range.begin ? mutation.param1 : asset.range.begin;
mutation.param2 = mutation.param2 < asset.range.end ? mutation.param2 : asset.range.end;
}
cc->sampledLogBytes += mutation.totalSize();
TraceEvent(SevFRMutationInfo, "FastRestoreDecodeLogFile")
.detail("CommitVersion", commitVersion)
.detail("ParsedMutation", mutation.toString());
auto it = kvOps.insert(std::make_pair(LogMessageVersion(commitVersion, sub++), MutationsVec()));
ASSERT(it.second); // inserted is true
ASSERT(sub < std::numeric_limits<int32_t>::max()); // range file mutation uses int32_max as subversion
it.first->second.push_back_deep(it.first->second.arena(), mutation);
// Sampling (FASTRESTORE_SAMPLING_PERCENT%) data
if (deterministicRandom()->random01() * 100 < SERVER_KNOBS->FASTRESTORE_SAMPLING_PERCENT) {
samples.push_back_deep(samples.arena(), mutation);
}
ASSERT_WE_THINK(kLen >= 0 && kLen < val.size());
ASSERT_WE_THINK(vLen >= 0 && vLen < val.size());
}
}
}
// Parsing the data blocks in a range file
// kvOpsIter: saves the parsed versioned-mutations for the sepcific LoadingParam;
// samplesIter: saves the sampled mutations from the parsed versioned-mutations;
// bc: backup container to read the backup file
// version: the version the parsed mutations should be at
// asset: RestoreAsset about which backup data should be parsed
ACTOR static Future<Void> _parseRangeFileToMutationsOnLoader(
std::map<LoadingParam, VersionedMutationsMap>::iterator kvOpsIter,
std::map<LoadingParam, MutationsVec>::iterator samplesIter, LoaderCounters* cc, Reference<IBackupContainer> bc,
Version version, RestoreAsset asset) {
state VersionedMutationsMap& kvOps = kvOpsIter->second;
state MutationsVec& sampleMutations = samplesIter->second;
TraceEvent("FastRestoreDecodedRangeFile")
.detail("Filename", asset.filename)
.detail("Version", version)
.detail("BeginVersion", asset.beginVersion)
.detail("EndVersion", asset.endVersion);
// Sanity check the range file is within the restored version range
ASSERT_WE_THINK(asset.isInVersionRange(version));
// The set of key value version is rangeFile.version. the key-value set in the same range file has the same version
Reference<IAsyncFile> inFile = wait(bc->readFile(asset.filename));
state Standalone<VectorRef<KeyValueRef>> blockData;
try {
Standalone<VectorRef<KeyValueRef>> kvs =
wait(fileBackup::decodeRangeFileBlock(inFile, asset.offset, asset.len));
TraceEvent("FastRestoreLoader")
.detail("DecodedRangeFile", asset.filename)
.detail("DataSize", kvs.contents().size());
blockData = kvs;
} catch (Error& e) {
TraceEvent(SevError, "FileRestoreCorruptRangeFileBlock").error(e);
throw;
}
// First and last key are the range for this file
KeyRange fileRange = KeyRangeRef(blockData.front().key, blockData.back().key);
// If fileRange doesn't intersect restore range then we're done.
if (!fileRange.intersects(asset.range)) {
return Void();
}
// We know the file range intersects the restore range but there could still be keys outside the restore range.
// Find the subvector of kv pairs that intersect the restore range.
// Note that the first and last keys are just the range endpoints for this file.
// They are metadata, not the real data.
int rangeStart = 1;
int rangeEnd = blockData.size() - 1; // The rangeStart and rangeEnd is [,)
// Slide start from begining, stop if something in range is found
// Move rangeStart and rangeEnd until they is within restoreRange
while (rangeStart < rangeEnd && !asset.range.contains(blockData[rangeStart].key)) {
++rangeStart;
}
// Side end from back, stop if something at (rangeEnd-1) is found in range
while (rangeEnd > rangeStart && !asset.range.contains(blockData[rangeEnd - 1].key)) {
--rangeEnd;
}
// Now data only contains the kv mutation within restoreRange
VectorRef<KeyValueRef> data = blockData.slice(rangeStart, rangeEnd);
// Note we give INT_MAX as the sub sequence number to override any log mutations.
const LogMessageVersion msgVersion(version, std::numeric_limits<int32_t>::max());
// Convert KV in data into SET mutations of different keys in kvOps
for (const KeyValueRef& kv : data) {
// NOTE: The KV pairs in range files are the real KV pairs in original DB.
// Should NOT add prefix or remove surfix for the backup data!
MutationRef m(MutationRef::Type::SetValue, kv.key,
kv.value); // ASSUME: all operation in range file is set.
cc->loadedRangeBytes += m.totalSize();
// We cache all kv operations into kvOps, and apply all kv operations later in one place
auto it = kvOps.insert(std::make_pair(msgVersion, MutationsVec()));
TraceEvent(SevFRMutationInfo, "FastRestoreDecodeRangeFile")
.detail("CommitVersion", version)
.detail("ParsedMutationKV", m.toString());
it.first->second.push_back_deep(it.first->second.arena(), m);
// Sampling (FASTRESTORE_SAMPLING_PERCENT%) data
if (deterministicRandom()->random01() * 100 < SERVER_KNOBS->FASTRESTORE_SAMPLING_PERCENT) {
cc->sampledRangeBytes += m.totalSize();
sampleMutations.push_back_deep(sampleMutations.arena(), m);
}
}
return Void();
}
// Parse data blocks in a log file into a vector of <string, string> pairs.
// Each pair.second contains the mutations at a version encoded in pair.first;
// Step 1: decodeLogFileBlock into <string, string> pairs;
// Step 2: Concatenate the second of pairs with the same pair.first.
// pProcessedFileOffset: ensure each data block is processed in order exactly once;
// pMutationMap: concatenated mutation list string at the mutation's commit version
ACTOR static Future<Void> _parseLogFileToMutationsOnLoader(NotifiedVersion* pProcessedFileOffset,
SerializedMutationListMap* pMutationMap,
Reference<IBackupContainer> bc, RestoreAsset asset) {
Reference<IAsyncFile> inFile = wait(bc->readFile(asset.filename));
// decodeLogFileBlock() must read block by block!
state Standalone<VectorRef<KeyValueRef>> data =
wait(parallelFileRestore::decodeLogFileBlock(inFile, asset.offset, asset.len));
TraceEvent("FastRestoreLoader")
.detail("DecodedLogFile", asset.filename)
.detail("Offset", asset.offset)
.detail("Length", asset.len)
.detail("DataSize", data.contents().size());
// Ensure data blocks in the same file are processed in order
wait(pProcessedFileOffset->whenAtLeast(asset.offset));
if (pProcessedFileOffset->get() == asset.offset) {
for (const KeyValueRef& kv : data) {
// Concatenate the backuped param1 and param2 (KV) at the same version.
concatenateBackupMutationForLogFile(pMutationMap, kv.key, kv.value, asset);
}
pProcessedFileOffset->set(asset.offset + asset.len);
}
return Void();
}
// Return applier IDs that are used to apply key-values
std::vector<UID> getApplierIDs(std::map<Key, UID>& rangeToApplier) {
std::vector<UID> applierIDs;
for (auto& applier : rangeToApplier) {
applierIDs.push_back(applier.second);
}
ASSERT(!applierIDs.empty());
return applierIDs;
}
// Notify loaders that the version batch (index) has been applied.
// This affects which version batch each loader can release actors even when the worker has low memory
ACTOR Future<Void> handleFinishVersionBatchRequest(RestoreVersionBatchRequest req, Reference<RestoreLoaderData> self) {
// Ensure batch (i-1) is applied before batch i
TraceEvent("FastRestoreLoaderHandleFinishVersionBatch", self->id())
.detail("FinishedBatchIndex", self->finishedBatch.get())
.detail("RequestedBatchIndex", req.batchIndex);
wait(self->finishedBatch.whenAtLeast(req.batchIndex - 1));
if (self->finishedBatch.get() == req.batchIndex - 1) {
self->finishedBatch.set(req.batchIndex);
// Clean up batchData
self->batch.erase(req.batchIndex);
self->status.erase(req.batchIndex);
}
if (self->delayedActors > 0) {
self->checkMemory.trigger();
}
req.reply.send(RestoreCommonReply(self->id(), false));
return Void();
}
// Test splitMutation
TEST_CASE("/FastRestore/RestoreLoader/splitMutation") {
std::map<Key, UID> rangeToApplier;
MutationsVec mvector;
Standalone<VectorRef<UID>> nodeIDs;
// Prepare RangeToApplier
rangeToApplier.emplace(normalKeys.begin, deterministicRandom()->randomUniqueID());
int numAppliers = deterministicRandom()->randomInt(1, 50);
for (int i = 0; i < numAppliers; ++i) {
Key k = Key(deterministicRandom()->randomAlphaNumeric(deterministicRandom()->randomInt(1, 1000)));
UID node = deterministicRandom()->randomUniqueID();
rangeToApplier.emplace(k, node);
TraceEvent("RangeToApplier").detail("Key", k).detail("Node", node);
}
Key k1 = Key(deterministicRandom()->randomAlphaNumeric(deterministicRandom()->randomInt(1, 500)));
Key k2 = Key(deterministicRandom()->randomAlphaNumeric(deterministicRandom()->randomInt(1, 1000)));
Key beginK = k1 < k2 ? k1 : k2;
Key endK = k1 < k2 ? k2 : k1;
Standalone<MutationRef> mutation(MutationRef(MutationRef::ClearRange, beginK.contents(), endK.contents()));
// Method 1: Use splitMutation
splitMutation(&rangeToApplier, mutation, mvector.arena(), mvector.contents(), nodeIDs.arena(), nodeIDs.contents());
ASSERT(mvector.size() == nodeIDs.size());
// Method 2: Use intersection
KeyRangeMap<UID> krMap;
std::map<Key, UID>::iterator beginKey = rangeToApplier.begin();
std::map<Key, UID>::iterator endKey = std::next(beginKey, 1);
while (endKey != rangeToApplier.end()) {
TraceEvent("KeyRangeMap")
.detail("BeginKey", beginKey->first)
.detail("EndKey", endKey->first)
.detail("Node", beginKey->second);
krMap.insert(KeyRangeRef(beginKey->first, endKey->first), beginKey->second);
beginKey = endKey;
endKey++;
}
if (beginKey != rangeToApplier.end()) {
TraceEvent("KeyRangeMap")
.detail("BeginKey", beginKey->first)
.detail("EndKey", normalKeys.end)
.detail("Node", beginKey->second);
krMap.insert(KeyRangeRef(beginKey->first, normalKeys.end), beginKey->second);
}
int splitMutationIndex = 0;
auto r = krMap.intersectingRanges(KeyRangeRef(mutation.param1, mutation.param2));
bool correctResult = true;
for (auto i = r.begin(); i != r.end(); ++i) {
// intersectionRange result
// Calculate the overlap range
KeyRef rangeBegin = mutation.param1 > i->range().begin ? mutation.param1 : i->range().begin;
KeyRef rangeEnd = mutation.param2 < i->range().end ? mutation.param2 : i->range().end;
KeyRange krange1(KeyRangeRef(rangeBegin, rangeEnd));
UID nodeID = i->value();
// splitMuation result
if (splitMutationIndex >= mvector.size()) {
correctResult = false;
break;
}
MutationRef result2M = mvector[splitMutationIndex];
UID applierID = nodeIDs[splitMutationIndex];
KeyRange krange2(KeyRangeRef(result2M.param1, result2M.param2));
TraceEvent("Result")
.detail("KeyRange1", krange1.toString())
.detail("KeyRange2", krange2.toString())
.detail("ApplierID1", nodeID)
.detail("ApplierID2", applierID);
if (krange1 != krange2 || nodeID != applierID) {
correctResult = false;
TraceEvent(SevError, "IncorrectResult")
.detail("Mutation", mutation.toString())
.detail("KeyRange1", krange1.toString())
.detail("KeyRange2", krange2.toString())
.detail("ApplierID1", nodeID)
.detail("ApplierID2", applierID);
}
splitMutationIndex++;
}
if (splitMutationIndex != mvector.size()) {
correctResult = false;
TraceEvent(SevError, "SplitMuationTooMany")
.detail("SplitMutationIndex", splitMutationIndex)
.detail("Results", mvector.size());
for (; splitMutationIndex < mvector.size(); splitMutationIndex++) {
TraceEvent("SplitMuationTooMany")
.detail("SplitMutationIndex", splitMutationIndex)
.detail("Result", mvector[splitMutationIndex].toString());
}
}
return Void();
}
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