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foundationdb/fdbserver/RestoreController.actor.h

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/*
* RestoreController.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 declear RestoreController interface and actors
#pragma once
#if defined(NO_INTELLISENSE) && !defined(FDBSERVER_RESTORE_CONTROLLER_G_H)
#define FDBSERVER_RESTORE_CONTROLLER_G_H
#include "fdbserver/RestoreController.actor.g.h"
#elif !defined(FDBSERVER_RESTORE_CONTROLLER_H)
#define FDBSERVER_RESTORE_CONTROLLER_H
#include <sstream>
#include "flow/Platform.h"
#include "fdbclient/FDBTypes.h"
#include "fdbclient/CommitTransaction.h"
#include "fdbrpc/fdbrpc.h"
#include "fdbrpc/Locality.h"
#include "fdbrpc/Stats.h"
#include "fdbserver/CoordinationInterface.h"
#include "fdbserver/RestoreUtil.h"
#include "fdbserver/RestoreRoleCommon.actor.h"
#include "fdbserver/RestoreWorker.actor.h"
#include "flow/actorcompiler.h" // has to be last include
struct VersionBatch {
Version beginVersion; // Inclusive
Version endVersion; // exclusive
std::set<RestoreFileFR> logFiles;
std::set<RestoreFileFR> rangeFiles;
double size; // size of data in range and log files
int batchIndex; // Never reset
VersionBatch() : beginVersion(0), endVersion(0), size(0){};
bool operator<(const VersionBatch& rhs) const {
return std::tie(batchIndex, beginVersion, endVersion, logFiles, rangeFiles, size) <
std::tie(rhs.batchIndex, rhs.beginVersion, rhs.endVersion, rhs.logFiles, rhs.rangeFiles, rhs.size);
}
bool isEmpty() { return logFiles.empty() && rangeFiles.empty(); }
void reset() {
beginVersion = 0;
endVersion = 0;
logFiles.clear();
rangeFiles.clear();
size = 0;
}
// RestoreAsset and VersionBatch both use endVersion as exclusive in version range
bool isInVersionRange(Version version) const { return version >= beginVersion && version < endVersion; }
};
struct ControllerBatchData : public ReferenceCounted<ControllerBatchData> {
// rangeToApplier is in controller and loader node. Loader uses this to determine which applier a mutation should be
// sent.
// KeyRef is the inclusive lower bound of the key range the applier (UID) is responsible for
std::map<Key, UID> rangeToApplier;
Optional<Future<Void>> applyToDB;
IndexedSet<Key, int64_t> samples; // sample of range and log files
double samplesSize; // sum of the metric of all samples
std::set<UID> sampleMsgs; // deduplicate sample messages
ControllerBatchData() = default;
~ControllerBatchData() = default;
// Return true if pass the sanity check
bool sanityCheckApplierKeyRange() {
bool ret = true;
// An applier should only appear once in rangeToApplier
std::map<UID, Key> applierToRange;
for (auto& applier : rangeToApplier) {
if (applierToRange.find(applier.second) == applierToRange.end()) {
applierToRange[applier.second] = applier.first;
} else {
TraceEvent(SevError, "FastRestoreController")
.detail("SanityCheckApplierKeyRange", applierToRange.size())
.detail("ApplierID", applier.second)
.detail("Key1", applierToRange[applier.second])
.detail("Key2", applier.first);
ret = false;
}
}
return ret;
}
void logApplierKeyRange(int batchIndex) {
TraceEvent("FastRestoreLogApplierKeyRange")
.detail("BatchIndex", batchIndex)
.detail("ApplierKeyRangeNum", rangeToApplier.size());
for (auto& applier : rangeToApplier) {
TraceEvent("FastRestoreLogApplierKeyRange")
.detail("BatchIndex", batchIndex)
.detail("KeyRangeLowerBound", applier.first)
.detail("Applier", applier.second);
}
}
};
enum class RestoreAssetStatus { Loading, Loaded };
enum class RestoreSendStatus { SendingLogs, SendedLogs, SendingRanges, SendedRanges };
enum class RestoreApplyStatus { Applying, Applied };
// Track restore progress of each RestoreAsset (RA) and
// Use status to sanity check restore property, e.g., each RA should be processed exactly once.
struct ControllerBatchStatus : public ReferenceCounted<ControllerBatchStatus> {
std::map<RestoreAsset, RestoreAssetStatus> raStatus;
std::map<UID, RestoreSendStatus> loadStatus;
std::map<UID, RestoreApplyStatus> applyStatus;
void addref() { return ReferenceCounted<ControllerBatchStatus>::addref(); }
void delref() { return ReferenceCounted<ControllerBatchStatus>::delref(); }
ControllerBatchStatus() = default;
~ControllerBatchStatus() = default;
};
struct RestoreControllerData : RestoreRoleData, public ReferenceCounted<RestoreControllerData> {
std::map<Version, VersionBatch> versionBatches; // key is the beginVersion of the version batch
Reference<IBackupContainer> bc; // Backup container is used to read backup files
Key bcUrl; // The url used to get the bc
std::map<int, Reference<ControllerBatchData>> batch;
std::map<int, Reference<ControllerBatchStatus>> batchStatus;
AsyncVar<int> runningVersionBatches; // Currently running version batches
std::map<UID, double> rolesHeartBeatTime; // Key: role id; Value: most recent time controller receives heart beat
// addActor: add to actorCollection so that when an actor has error, the ActorCollection can catch the error.
// addActor is used to create the actorCollection when the RestoreController is created
PromiseStream<Future<Void>> addActor;
void addref() { return ReferenceCounted<RestoreControllerData>::addref(); }
void delref() { return ReferenceCounted<RestoreControllerData>::delref(); }
RestoreControllerData(UID interfId) {
role = RestoreRole::Controller;
nodeID = interfId;
runningVersionBatches.set(0);
}
~RestoreControllerData() = default;
int getVersionBatchState(int batchIndex) final { return RoleVersionBatchState::INVALID; }
void setVersionBatchState(int batchIndex, int vbState) final {}
void initVersionBatch(int batchIndex) {
TraceEvent("FastRestoreControllerInitVersionBatch", id()).detail("VersionBatchIndex", batchIndex);
}
// Reset controller data at the beginning of each restore request
void resetPerRestoreRequest() {
TraceEvent("FastRestoreControllerReset").detail("OldVersionBatches", versionBatches.size());
versionBatches.clear();
batch.clear();
batchStatus.clear();
finishedBatch = NotifiedVersion();
ASSERT(runningVersionBatches.get() == 0);
}
std::string describeNode() {
std::stringstream ss;
ss << "Controller";
return ss.str();
}
void dumpVersionBatches(const std::map<Version, VersionBatch>& versionBatches) {
int i = 1;
double rangeFiles = 0;
double rangeSize = 0;
double logFiles = 0;
double logSize = 0;
for (auto& vb : versionBatches) {
TraceEvent("FastRestoreVersionBatches")
.detail("BatchIndex", vb.second.batchIndex)
.detail("ExpectedBatchIndex", i)
.detail("BeginVersion", vb.second.beginVersion)
.detail("EndVersion", vb.second.endVersion)
.detail("Size", vb.second.size);
for (auto& f : vb.second.rangeFiles) {
bool invalidVersion = (f.beginVersion != f.endVersion) || (f.beginVersion >= vb.second.endVersion ||
f.beginVersion < vb.second.beginVersion);
TraceEvent(invalidVersion ? SevError : SevInfo, "FastRestoreVersionBatches")
.detail("BatchIndex", i)
.detail("RangeFile", f.toString());
rangeSize += f.fileSize;
rangeFiles++;
}
for (auto& f : vb.second.logFiles) {
bool outOfRange = (f.beginVersion >= vb.second.endVersion || f.endVersion <= vb.second.beginVersion);
TraceEvent(outOfRange ? SevError : SevInfo, "FastRestoreVersionBatches")
.detail("BatchIndex", i)
.detail("LogFile", f.toString());
logSize += f.fileSize;
logFiles++;
}
++i;
}
TraceEvent("FastRestoreVersionBatchesSummary")
.detail("VersionBatches", versionBatches.size())
.detail("LogFiles", logFiles)
.detail("RangeFiles", rangeFiles)
.detail("LogBytes", logSize)
.detail("RangeBytes", rangeSize);
}
// Input: Get the size of data in backup files in version range [prevVersion, nextVersion)
// Return: param1: the size of data at nextVersion, param2: the minimum range file index whose version >
// nextVersion, param3: log files with data in [prevVersion, nextVersion)
std::tuple<double, int, std::vector<RestoreFileFR>> getVersionSize(Version prevVersion, Version nextVersion,
const std::vector<RestoreFileFR>& rangeFiles,
int rangeIdx,
const std::vector<RestoreFileFR>& logFiles) {
double size = 0;
TraceEvent(SevDebug, "FastRestoreGetVersionSize")
.detail("PreviousVersion", prevVersion)
.detail("NextVersion", nextVersion)
.detail("RangeFiles", rangeFiles.size())
.detail("RangeIndex", rangeIdx)
.detail("LogFiles", logFiles.size());
ASSERT(prevVersion <= nextVersion);
while (rangeIdx < rangeFiles.size()) {
TraceEvent(SevDebug, "FastRestoreGetVersionSize").detail("RangeFile", rangeFiles[rangeIdx].toString());
if (rangeFiles[rangeIdx].version < nextVersion) {
ASSERT(rangeFiles[rangeIdx].version >= prevVersion);
size += rangeFiles[rangeIdx].fileSize;
} else {
break;
}
++rangeIdx;
}
std::vector<RestoreFileFR> retLogs;
// Scan all logFiles every time to avoid assumption on log files' version ranges.
// For example, we do not assume each version range only exists in one log file
for (const auto& file : logFiles) {
Version begin = std::max(prevVersion, file.beginVersion);
Version end = std::min(nextVersion, file.endVersion);
if (begin < end) { // logIdx file overlap in [prevVersion, nextVersion)
double ratio = (end - begin) * 1.0 / (file.endVersion - file.beginVersion);
size += file.fileSize * ratio;
retLogs.push_back(file);
}
}
return std::make_tuple(size, rangeIdx, retLogs);
}
// Split backup files into version batches, each of which has similar data size
// Input: sorted range files, sorted log files;
// Output: a set of version batches whose size is less than SERVER_KNOBS->FASTRESTORE_VERSIONBATCH_MAX_BYTES
// and each mutation in backup files is included in the version batches exactly once.
// Assumption 1: input files has no empty files;
// Assumption 2: range files at one version <= FASTRESTORE_VERSIONBATCH_MAX_BYTES.
// Note: We do not allow a versionBatch size larger than the FASTRESTORE_VERSIONBATCH_MAX_BYTES because the range
// file size at a version depends on the number of backupAgents and its upper bound is hard to get.
void buildVersionBatches(const std::vector<RestoreFileFR>& rangeFiles, const std::vector<RestoreFileFR>& logFiles,
std::map<Version, VersionBatch>* versionBatches, Version targetVersion) {
bool rewriteNextVersion = false;
int rangeIdx = 0;
int logIdx = 0; // Ensure each log file is included in version batch
Version prevEndVersion = 0;
Version nextVersion = 0; // Used to calculate the batch's endVersion
VersionBatch vb;
Version maxVBVersion = 0;
bool lastLogFile = false;
vb.beginVersion = 0; // Version batch range [beginVersion, endVersion)
vb.batchIndex = 1;
while (rangeIdx < rangeFiles.size() || logIdx < logFiles.size()) {
if (!rewriteNextVersion) {
if (rangeIdx < rangeFiles.size() && logIdx < logFiles.size()) {
// nextVersion as endVersion is exclusive in the version range
nextVersion = std::max(rangeFiles[rangeIdx].version + 1, nextVersion);
} else if (rangeIdx < rangeFiles.size()) { // i.e., logIdx >= logFiles.size()
nextVersion = rangeFiles[rangeIdx].version + 1;
} else if (logIdx < logFiles.size()) {
while (logIdx < logFiles.size() && logFiles[logIdx].endVersion <= nextVersion) {
logIdx++;
}
if (logIdx < logFiles.size()) {
nextVersion = logFiles[logIdx].endVersion;
} else {
TraceEvent(SevFRDebugInfo, "FastRestoreBuildVersionBatch")
.detail("FinishAllLogFiles", logIdx)
.detail("CurBatchIndex", vb.batchIndex)
.detail("CurBatchSize", vb.size);
if (prevEndVersion < nextVersion) {
// Ensure the last log file is included in version batch
lastLogFile = true;
} else {
break; // Finished all log files
}
}
} else {
// TODO: Check why this may happen?!
TraceEvent(SevError, "FastRestoreBuildVersionBatch")
.detail("RangeIndex", rangeIdx)
.detail("RangeFiles", rangeFiles.size())
.detail("LogIndex", logIdx)
.detail("LogFiles", logFiles.size());
}
} else {
rewriteNextVersion = false;
}
double nextVersionSize;
int nextRangeIdx;
std::vector<RestoreFileFR> curLogFiles;
std::tie(nextVersionSize, nextRangeIdx, curLogFiles) =
getVersionSize(prevEndVersion, nextVersion, rangeFiles, rangeIdx, logFiles);
TraceEvent(SevFRDebugInfo, "FastRestoreBuildVersionBatch")
.detail("BatchIndex", vb.batchIndex)
.detail("VersionBatchBeginVersion", vb.beginVersion)
.detail("PreviousEndVersion", prevEndVersion)
.detail("NextVersion", nextVersion)
.detail("TargetVersion", targetVersion)
.detail("RangeIndex", rangeIdx)
.detail("RangeFiles", rangeFiles.size())
.detail("LogIndex", logIdx)
.detail("LogFiles", logFiles.size())
.detail("VersionBatchSizeThreshold", SERVER_KNOBS->FASTRESTORE_VERSIONBATCH_MAX_BYTES)
.detail("CurrentBatchSize", vb.size)
.detail("NextVersionIntervalSize", nextVersionSize)
.detail("NextRangeIndex", nextRangeIdx)
.detail("UsedLogFiles", curLogFiles.size())
.detail("VersionBatchCurRangeFiles", vb.rangeFiles.size())
.detail("VersionBatchCurLogFiles", vb.logFiles.size())
.detail("LastLogFile", lastLogFile);
ASSERT(prevEndVersion < nextVersion); // Ensure progress
if (vb.size + nextVersionSize <= SERVER_KNOBS->FASTRESTORE_VERSIONBATCH_MAX_BYTES ||
(vb.size < 1 && prevEndVersion + 1 == nextVersion) || lastLogFile) {
// In case the batch size at a single version > FASTRESTORE_VERSIONBATCH_MAX_BYTES,
// the version batch should include the single version to avoid false positive in simulation.
if (vb.size + nextVersionSize > SERVER_KNOBS->FASTRESTORE_VERSIONBATCH_MAX_BYTES) {
TraceEvent(g_network->isSimulated() ? SevWarnAlways : SevError, "FastRestoreBuildVersionBatch")
.detail("NextVersion", nextVersion)
.detail("PreviousEndVersion", prevEndVersion)
.detail("NextVersionIntervalSize", nextVersionSize)
.detail("VersionBatchSizeThreshold", SERVER_KNOBS->FASTRESTORE_VERSIONBATCH_MAX_BYTES)
.detail("SuggestedMinimumVersionBatchSizeThreshold", nextVersionSize * 2);
}
// nextVersion should be included in this batch
vb.size += nextVersionSize;
while (rangeIdx < nextRangeIdx && rangeIdx < rangeFiles.size()) {
ASSERT(rangeFiles[rangeIdx].fileSize > 0);
vb.rangeFiles.insert(rangeFiles[rangeIdx]);
++rangeIdx;
}
for (auto& log : curLogFiles) {
ASSERT(log.beginVersion < nextVersion);
ASSERT(log.endVersion > prevEndVersion);
ASSERT(log.fileSize > 0);
vb.logFiles.insert(log);
}
vb.endVersion = std::min(nextVersion, targetVersion + 1);
maxVBVersion = std::max(maxVBVersion, vb.endVersion);
prevEndVersion = vb.endVersion;
} else {
if (vb.size < 1) {
// [vb.endVersion, nextVersion) > SERVER_KNOBS->FASTRESTORE_VERSIONBATCH_MAX_BYTES. We should split
// the version range
if (prevEndVersion >= nextVersion) {
// If range files at one version > FASTRESTORE_VERSIONBATCH_MAX_BYTES, DBA should increase
// FASTRESTORE_VERSIONBATCH_MAX_BYTES to some value larger than nextVersion
TraceEvent(SevError, "FastRestoreBuildVersionBatch")
.detail("NextVersion", nextVersion)
.detail("PreviousEndVersion", prevEndVersion)
.detail("NextVersionIntervalSize", nextVersionSize)
.detail("VersionBatchSizeThreshold", SERVER_KNOBS->FASTRESTORE_VERSIONBATCH_MAX_BYTES)
.detail("SuggestedMinimumVersionBatchSizeThreshold", nextVersionSize * 2);
// Exit restore early if it won't succeed
flushAndExit(FDB_EXIT_ERROR);
}
ASSERT(prevEndVersion < nextVersion); // Ensure progress
nextVersion = (prevEndVersion + nextVersion) / 2;
rewriteNextVersion = true;
TraceEvent(SevFRDebugInfo, "FastRestoreBuildVersionBatch")
.detail("NextVersionIntervalSize", nextVersionSize); // Duplicate Trace
continue;
}
// Finalize the current version batch
versionBatches->emplace(vb.beginVersion, vb); // copy vb to versionBatch
TraceEvent(SevFRDebugInfo, "FastRestoreBuildVersionBatch")
.detail("FinishBatchIndex", vb.batchIndex)
.detail("VersionBatchBeginVersion", vb.beginVersion)
.detail("VersionBatchEndVersion", vb.endVersion)
.detail("VersionBatchLogFiles", vb.logFiles.size())
.detail("VersionBatchRangeFiles", vb.rangeFiles.size())
.detail("VersionBatchSize", vb.size)
.detail("RangeIndex", rangeIdx)
.detail("LogIndex", logIdx)
.detail("NewVersionBatchBeginVersion", prevEndVersion)
.detail("RewriteNextVersion", rewriteNextVersion);
// start finding the next version batch
vb.reset();
vb.size = 0;
vb.beginVersion = prevEndVersion;
vb.batchIndex++;
}
}
// The last wip version batch has some files
if (vb.size > 0) {
vb.endVersion = std::min(nextVersion, targetVersion + 1);
maxVBVersion = std::max(maxVBVersion, vb.endVersion);
versionBatches->emplace(vb.beginVersion, vb);
}
// Invariant: The last vb endverion should be no smaller than targetVersion
if (maxVBVersion < targetVersion) {
// Q: Is the restorable version always less than the maximum version from all backup filenames?
// A: This is true for the raw backup files returned by backup container before we remove the empty files.
TraceEvent(SevWarnAlways, "FastRestoreBuildVersionBatch")
.detail("TargetVersion", targetVersion)
.detail("MaxVersionBatchVersion", maxVBVersion);
}
}
void initBackupContainer(Key url) {
if (bcUrl == url && bc.isValid()) {
return;
}
TraceEvent("FastRestoreControllerInitBackupContainer").detail("URL", url);
bcUrl = url;
bc = IBackupContainer::openContainer(url.toString());
}
};
ACTOR Future<Void> startRestoreController(Reference<RestoreWorkerData> controllerWorker, Database cx);
#include "flow/unactorcompiler.h"
#endif
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