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DataDistribution.actor.cpp
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DataDistribution.actor.cpp
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/*
* DataDistribution.actor.cpp
*
* This source file is part of the FoundationDB open source project
*
* Copyright 2013-2022 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.
*/
#include <set>
#include <string>
#include "fdbclient/Audit.h"
#include "fdbclient/AuditUtils.actor.h"
#include "fdbclient/DatabaseContext.h"
#include "fdbclient/FDBOptions.g.h"
#include "fdbclient/FDBTypes.h"
#include "fdbclient/Knobs.h"
#include "fdbclient/ManagementAPI.actor.h"
#include "fdbclient/RunRYWTransaction.actor.h"
#include "fdbclient/StorageServerInterface.h"
#include "fdbclient/SystemData.h"
#include "fdbclient/Tenant.h"
#include "fdbrpc/Replication.h"
#include "fdbserver/DDSharedContext.h"
#include "fdbserver/DDTeamCollection.h"
#include "fdbserver/DataDistribution.actor.h"
#include "fdbserver/FDBExecHelper.actor.h"
#include "fdbclient/IKeyValueStore.h"
#include "fdbserver/Knobs.h"
#include "fdbserver/QuietDatabase.h"
#include "fdbserver/ServerDBInfo.h"
#include "fdbserver/TLogInterface.h"
#include "fdbserver/TenantCache.h"
#include "fdbserver/WaitFailure.h"
#include "fdbserver/workloads/workloads.actor.h"
#include "flow/ActorCollection.h"
#include "flow/Arena.h"
#include "flow/BooleanParam.h"
#include "flow/Trace.h"
#include "flow/UnitTest.h"
#include "flow/actorcompiler.h" // This must be the last #include.
#include "flow/genericactors.actor.h"
#include "flow/serialize.h"
ShardSizeBounds ShardSizeBounds::shardSizeBoundsBeforeTrack() {
return ShardSizeBounds{ .max = StorageMetrics{ .bytes = -1,
.bytesWrittenPerKSecond = StorageMetrics::infinity,
.iosPerKSecond = StorageMetrics::infinity,
.bytesReadPerKSecond = StorageMetrics::infinity,
.opsReadPerKSecond = StorageMetrics::infinity },
.min = StorageMetrics{ .bytes = -1,
.bytesWrittenPerKSecond = 0,
.iosPerKSecond = 0,
.bytesReadPerKSecond = 0,
.opsReadPerKSecond = 0 },
.permittedError = StorageMetrics{ .bytes = -1,
.bytesWrittenPerKSecond = StorageMetrics::infinity,
.iosPerKSecond = StorageMetrics::infinity,
.bytesReadPerKSecond = StorageMetrics::infinity,
.opsReadPerKSecond = StorageMetrics::infinity } };
}
enum class DDAuditContext : uint8_t {
Invalid = 0,
Resume = 1,
Launch = 2,
Retry = 3,
};
struct DDAudit {
DDAudit(AuditStorageState coreState)
: coreState(coreState), actors(true), foundError(false), auditStorageAnyChildFailed(false), retryCount(0),
cancelled(false), overallCompleteDoAuditCount(0), overallIssuedDoAuditCount(0), overallSkippedDoAuditCount(0),
remainingBudgetForAuditTasks(SERVER_KNOBS->CONCURRENT_AUDIT_TASK_COUNT_MAX), context(0) {}
AuditStorageState coreState;
ActorCollection actors;
Future<Void> auditActor;
bool foundError;
int retryCount;
bool auditStorageAnyChildFailed;
bool cancelled; // use to cancel any actor beyond auditActor
int64_t overallIssuedDoAuditCount;
int64_t overallCompleteDoAuditCount;
int64_t overallSkippedDoAuditCount;
AsyncVar<int> remainingBudgetForAuditTasks;
uint8_t context;
std::unordered_set<UID> serversFinishedSSShardAudit; // dedicated to ssshard
inline void setAuditRunActor(Future<Void> actor) { auditActor = actor; }
inline Future<Void> getAuditRunActor() { return auditActor; }
inline void setDDAuditContext(DDAuditContext context) { this->context = static_cast<uint8_t>(context); }
inline DDAuditContext getDDAuditContext() const { return static_cast<DDAuditContext>(this->context); }
// auditActor and actors are guaranteed to deliver a cancel signal
void cancel() {
auditActor.cancel();
actors.clear(true);
cancelled = true;
}
bool isCancelled() const { return cancelled; }
};
void DataMove::validateShard(const DDShardInfo& shard, KeyRangeRef range, int priority) {
if (!valid) {
if (shard.hasDest && shard.destId != anonymousShardId) {
TraceEvent(SevError, "DataMoveValidationError")
.detail("Range", range)
.detail("Reason", "DataMoveMissing")
.detail("DestID", shard.destId)
.detail("ShardPrimaryDest", describe(shard.primaryDest))
.detail("ShardRemoteDest", describe(shard.remoteDest));
}
return;
}
ASSERT(!this->meta.ranges.empty() && this->meta.ranges.front().contains(range));
if (!shard.hasDest) {
TraceEvent(SevWarnAlways, "DataMoveValidationError")
.detail("Range", range)
.detail("Reason", "ShardMissingDest")
.detail("DataMoveMetaData", this->meta.toString())
.detail("DataMovePrimaryDest", describe(this->primaryDest))
.detail("DataMoveRemoteDest", describe(this->remoteDest));
cancelled = true;
return;
}
if (shard.destId != this->meta.id) {
TraceEvent(SevWarnAlways, "DataMoveValidationError")
.detail("Range", range)
.detail("Reason", "DataMoveIDMissMatch")
.detail("DataMoveMetaData", this->meta.toString())
.detail("ShardMoveID", shard.destId);
cancelled = true;
return;
}
if (!std::equal(
this->primaryDest.begin(), this->primaryDest.end(), shard.primaryDest.begin(), shard.primaryDest.end()) ||
!std::equal(
this->remoteDest.begin(), this->remoteDest.end(), shard.remoteDest.begin(), shard.remoteDest.end())) {
TraceEvent(g_network->isSimulated() ? SevWarn : SevError, "DataMoveValidationError")
.detail("Range", range)
.detail("Reason", "DataMoveDestMissMatch")
.detail("DataMoveMetaData", this->meta.toString())
.detail("DataMovePrimaryDest", describe(this->primaryDest))
.detail("DataMoveRemoteDest", describe(this->remoteDest))
.detail("ShardPrimaryDest", describe(shard.primaryDest))
.detail("ShardRemoteDest", describe(shard.remoteDest));
cancelled = true;
}
}
Future<Void> StorageWiggler::onCheck() const {
return delay(MIN_ON_CHECK_DELAY_SEC);
}
// add server to wiggling queue
void StorageWiggler::addServer(const UID& serverId, const StorageMetadataType& metadata) {
// std::cout << "size: " << pq_handles.size() << " add " << serverId.toString() << " DC: "
// << teamCollection->isPrimary() << std::endl;
ASSERT(!pq_handles.count(serverId));
pq_handles[serverId] = wiggle_pq.emplace(metadata, serverId);
}
void StorageWiggler::removeServer(const UID& serverId) {
// std::cout << "size: " << pq_handles.size() << " remove " << serverId.toString() << " DC: "
// << teamCollection->isPrimary() << std::endl;
if (contains(serverId)) { // server haven't been popped
auto handle = pq_handles.at(serverId);
pq_handles.erase(serverId);
wiggle_pq.erase(handle);
}
}
void StorageWiggler::updateMetadata(const UID& serverId, const StorageMetadataType& metadata) {
// std::cout << "size: " << pq_handles.size() << " update " << serverId.toString()
// << " DC: " << teamCollection->isPrimary() << std::endl;
auto handle = pq_handles.at(serverId);
if ((*handle).first == metadata) {
return;
}
wiggle_pq.update(handle, std::make_pair(metadata, serverId));
}
bool StorageWiggler::necessary(const UID& serverId, const StorageMetadataType& metadata) const {
return metadata.wrongConfigured || (now() - metadata.createdTime > SERVER_KNOBS->DD_STORAGE_WIGGLE_MIN_SS_AGE_SEC);
}
Optional<UID> StorageWiggler::getNextServerId(bool necessaryOnly) {
if (!wiggle_pq.empty()) {
auto [metadata, id] = wiggle_pq.top();
if (necessaryOnly && !necessary(id, metadata)) {
return {};
}
wiggle_pq.pop();
pq_handles.erase(id);
return Optional<UID>(id);
}
return Optional<UID>();
}
Future<Void> StorageWiggler::resetStats() {
metrics.reset();
return runRYWTransaction(
teamCollection->dbContext(), [this](Reference<ReadYourWritesTransaction> tr) -> Future<Void> {
return wiggleData.resetStorageWiggleMetrics(tr, PrimaryRegion(teamCollection->isPrimary()), metrics);
});
}
Future<Void> StorageWiggler::restoreStats() {
auto readFuture = wiggleData.storageWiggleMetrics(PrimaryRegion(teamCollection->isPrimary()))
.getD(teamCollection->dbContext().getReference(), Snapshot::False, metrics);
return store(metrics, readFuture);
}
Future<Void> StorageWiggler::startWiggle() {
metrics.last_wiggle_start = StorageMetadataType::currentTime();
if (shouldStartNewRound()) {
metrics.last_round_start = metrics.last_wiggle_start;
}
return runRYWTransaction(
teamCollection->dbContext(), [this](Reference<ReadYourWritesTransaction> tr) -> Future<Void> {
return wiggleData.updateStorageWiggleMetrics(tr, metrics, PrimaryRegion(teamCollection->isPrimary()));
});
}
Future<Void> StorageWiggler::finishWiggle() {
metrics.last_wiggle_finish = StorageMetadataType::currentTime();
metrics.finished_wiggle += 1;
auto duration = metrics.last_wiggle_finish - metrics.last_wiggle_start;
metrics.smoothed_wiggle_duration.setTotal((double)duration);
if (shouldFinishRound()) {
metrics.last_round_finish = metrics.last_wiggle_finish;
metrics.finished_round += 1;
duration = metrics.last_round_finish - metrics.last_round_start;
metrics.smoothed_round_duration.setTotal((double)duration);
}
return runRYWTransaction(
teamCollection->dbContext(), [this](Reference<ReadYourWritesTransaction> tr) -> Future<Void> {
return wiggleData.updateStorageWiggleMetrics(tr, metrics, PrimaryRegion(teamCollection->isPrimary()));
});
}
ACTOR Future<Void> remoteRecovered(Reference<AsyncVar<ServerDBInfo> const> db) {
TraceEvent("DDTrackerStarting").log();
while (db->get().recoveryState < RecoveryState::ALL_LOGS_RECRUITED) {
TraceEvent("DDTrackerStarting").detail("RecoveryState", (int)db->get().recoveryState);
wait(db->onChange());
}
return Void();
}
// Ensures that the serverKeys key space is properly coalesced
// This method is only used for testing and is not implemented in a manner that is safe for large databases
ACTOR Future<Void> debugCheckCoalescing(Database cx) {
state Transaction tr(cx);
loop {
try {
state RangeResult serverList = wait(tr.getRange(serverListKeys, CLIENT_KNOBS->TOO_MANY));
ASSERT(!serverList.more && serverList.size() < CLIENT_KNOBS->TOO_MANY);
state int i;
for (i = 0; i < serverList.size(); i++) {
state UID id = decodeServerListValue(serverList[i].value).id();
RangeResult ranges = wait(krmGetRanges(&tr, serverKeysPrefixFor(id), allKeys));
ASSERT(ranges.end()[-1].key == allKeys.end);
for (int j = 0; j < ranges.size() - 2; j++)
if (ranges[j].value == ranges[j + 1].value)
TraceEvent(SevError, "UncoalescedValues", id)
.detail("Key1", ranges[j].key)
.detail("Key2", ranges[j + 1].key)
.detail("Value", ranges[j].value);
}
TraceEvent("DoneCheckingCoalescing").log();
return Void();
} catch (Error& e) {
wait(tr.onError(e));
}
}
}
static std::set<int> const& normalDDQueueErrors() {
static std::set<int> s;
if (s.empty()) {
s.insert(error_code_movekeys_conflict);
s.insert(error_code_broken_promise);
s.insert(error_code_data_move_cancelled);
s.insert(error_code_data_move_dest_team_not_found);
}
return s;
}
struct DataDistributor;
void runAuditStorage(
Reference<DataDistributor> self,
AuditStorageState auditStates,
int retryCount,
DDAuditContext context,
Optional<std::unordered_set<UID>> serversFinishedSSShardAudit = Optional<std::unordered_set<UID>>());
ACTOR Future<Void> auditStorageCore(Reference<DataDistributor> self,
UID auditID,
AuditType auditType,
int currentRetryCount);
ACTOR Future<UID> launchAudit(Reference<DataDistributor> self,
KeyRange auditRange,
AuditType auditType,
KeyValueStoreType auditStorageEngineType);
ACTOR Future<Void> auditStorage(Reference<DataDistributor> self, TriggerAuditRequest req);
void loadAndDispatchAudit(Reference<DataDistributor> self, std::shared_ptr<DDAudit> audit);
ACTOR Future<Void> dispatchAuditStorageServerShard(Reference<DataDistributor> self, std::shared_ptr<DDAudit> audit);
ACTOR Future<Void> scheduleAuditStorageShardOnServer(Reference<DataDistributor> self,
std::shared_ptr<DDAudit> audit,
StorageServerInterface ssi);
ACTOR Future<Void> dispatchAuditStorage(Reference<DataDistributor> self, std::shared_ptr<DDAudit> audit);
ACTOR Future<Void> dispatchAuditLocationMetadata(Reference<DataDistributor> self,
std::shared_ptr<DDAudit> audit,
KeyRange range);
ACTOR Future<Void> doAuditLocationMetadata(Reference<DataDistributor> self,
std::shared_ptr<DDAudit> audit,
KeyRange auditRange);
ACTOR Future<Void> scheduleAuditOnRange(Reference<DataDistributor> self,
std::shared_ptr<DDAudit> audit,
KeyRange range);
ACTOR Future<Void> doAuditOnStorageServer(Reference<DataDistributor> self,
std::shared_ptr<DDAudit> audit,
StorageServerInterface ssi,
AuditStorageRequest req);
ACTOR Future<Void> skipAuditOnRange(Reference<DataDistributor> self,
std::shared_ptr<DDAudit> audit,
KeyRange rangeToSkip);
struct DataDistributor : NonCopyable, ReferenceCounted<DataDistributor> {
public:
Reference<AsyncVar<ServerDBInfo> const> dbInfo;
Reference<DDSharedContext> context;
UID ddId;
PromiseStream<Future<Void>> addActor;
// State initialized when bootstrap
Reference<IDDTxnProcessor> txnProcessor;
MoveKeysLock lock;
DatabaseConfiguration configuration;
std::vector<Optional<Key>> primaryDcId;
std::vector<Optional<Key>> remoteDcIds;
Reference<InitialDataDistribution> initData;
Reference<EventCacheHolder> initialDDEventHolder;
Reference<EventCacheHolder> movingDataEventHolder;
Reference<EventCacheHolder> totalDataInFlightEventHolder;
Reference<EventCacheHolder> totalDataInFlightRemoteEventHolder;
// Optional components that can be set after ::init(). They're optional when test, but required for DD being
// fully-functional.
DDTeamCollection* teamCollection;
Reference<ShardsAffectedByTeamFailure> shardsAffectedByTeamFailure;
// consumer is a yield stream from producer. The RelocateShard is pushed into relocationProducer and popped from
// relocationConsumer (by DDQueue)
PromiseStream<RelocateShard> relocationProducer, relocationConsumer;
Reference<PhysicalShardCollection> physicalShardCollection;
Promise<Void> initialized;
std::unordered_map<AuditType, std::unordered_map<UID, std::shared_ptr<DDAudit>>> audits;
FlowLock auditStorageHaLaunchingLock;
FlowLock auditStorageReplicaLaunchingLock;
FlowLock auditStorageLocationMetadataLaunchingLock;
FlowLock auditStorageSsShardLaunchingLock;
Promise<Void> auditStorageInitialized;
bool auditStorageInitStarted;
Optional<Reference<TenantCache>> ddTenantCache;
DataDistributor(Reference<AsyncVar<ServerDBInfo> const> const& db, UID id, Reference<DDSharedContext> context)
: dbInfo(db), context(context), ddId(id), txnProcessor(nullptr),
initialDDEventHolder(makeReference<EventCacheHolder>("InitialDD")),
movingDataEventHolder(makeReference<EventCacheHolder>("MovingData")),
totalDataInFlightEventHolder(makeReference<EventCacheHolder>("TotalDataInFlight")),
totalDataInFlightRemoteEventHolder(makeReference<EventCacheHolder>("TotalDataInFlightRemote")),
teamCollection(nullptr), auditStorageHaLaunchingLock(1), auditStorageReplicaLaunchingLock(1),
auditStorageLocationMetadataLaunchingLock(1), auditStorageSsShardLaunchingLock(1),
auditStorageInitStarted(false) {}
// bootstrap steps
Future<Void> takeMoveKeysLock() { return store(lock, txnProcessor->takeMoveKeysLock(ddId)); }
Future<Void> loadDatabaseConfiguration() { return store(configuration, txnProcessor->getDatabaseConfiguration()); }
Future<Void> updateReplicaKeys() {
return txnProcessor->updateReplicaKeys(primaryDcId, remoteDcIds, configuration);
}
Future<Void> loadInitialDataDistribution() {
return store(initData,
txnProcessor->getInitialDataDistribution(
ddId,
lock,
configuration.usableRegions > 1 ? remoteDcIds : std::vector<Optional<Key>>(),
context->ddEnabledState.get(),
SkipDDModeCheck::False));
}
void initDcInfo() {
primaryDcId.clear();
remoteDcIds.clear();
const std::vector<RegionInfo>& regions = configuration.regions;
if (configuration.regions.size() > 0) {
primaryDcId.push_back(regions[0].dcId);
}
if (configuration.regions.size() > 1) {
remoteDcIds.push_back(regions[1].dcId);
}
}
Future<Void> waitDataDistributorEnabled() const {
return txnProcessor->waitForDataDistributionEnabled(context->ddEnabledState.get());
}
// Resume in-memory audit instances and issue background audit metadata cleanup
void resumeAuditStorage(Reference<DataDistributor> self, std::vector<AuditStorageState> auditStates) {
for (const auto& auditState : auditStates) {
if (auditState.getPhase() != AuditPhase::Running) {
TraceEvent(g_network->isSimulated() ? SevError : SevWarnAlways, "WrongAuditStateToResume")
.detail("AuditState", auditState.toString());
return;
}
if (self->audits.contains(auditState.getType()) &&
self->audits[auditState.getType()].contains(auditState.id)) {
// Ignore any RUNNING auditState with an alive audit
// instance in DD audits map
continue;
}
runAuditStorage(self, auditState, 0, DDAuditContext::Resume);
TraceEvent(SevInfo, "AuditStorageResumed", self->ddId)
.detail("AuditID", auditState.id)
.detail("AuditType", auditState.getType())
.detail("AuditState", auditState.toString());
}
return;
}
ACTOR static Future<Void> initAuditStorage(Reference<DataDistributor> self) {
self->auditStorageInitStarted = true;
MoveKeyLockInfo lockInfo;
lockInfo.myOwner = self->lock.myOwner;
lockInfo.prevOwner = self->lock.prevOwner;
lockInfo.prevWrite = self->lock.prevWrite;
std::vector<AuditStorageState> auditStatesToResume =
wait(initAuditMetadata(self->txnProcessor->context(),
lockInfo,
self->context->isDDEnabled(),
self->ddId,
SERVER_KNOBS->PERSIST_FINISH_AUDIT_COUNT));
self->resumeAuditStorage(self, auditStatesToResume);
self->auditStorageInitialized.send(Void());
return Void();
}
ACTOR static Future<Void> waitUntilDataDistributorExitSecurityMode(Reference<DataDistributor> self) {
state Transaction tr(self->txnProcessor->context());
loop {
wait(delay(SERVER_KNOBS->DD_ENABLED_CHECK_DELAY, TaskPriority::DataDistribution));
tr.setOption(FDBTransactionOptions::READ_LOCK_AWARE);
tr.setOption(FDBTransactionOptions::READ_SYSTEM_KEYS);
tr.setOption(FDBTransactionOptions::PRIORITY_SYSTEM_IMMEDIATE);
try {
Optional<Value> mode = wait(tr.get(dataDistributionModeKey));
if (!mode.present()) {
return Void();
}
BinaryReader rd(mode.get(), Unversioned());
int ddMode = 1;
rd >> ddMode;
if (ddMode != 2) {
return Void();
}
wait(checkMoveKeysLockReadOnly(&tr, self->lock, self->context->ddEnabledState.get()));
tr.reset();
} catch (Error& e) {
wait(tr.onError(e));
}
}
}
// Initialize the required internal states of DataDistributor from system metadata. It's necessary before
// DataDistributor start working. Doesn't include initialization of optional components, like TenantCache, DDQueue,
// Tracker, TeamCollection. The components should call its own ::init methods.
ACTOR static Future<Void> init(Reference<DataDistributor> self) {
loop {
TraceEvent("DDInitTakingMoveKeysLock", self->ddId).log();
wait(self->takeMoveKeysLock());
TraceEvent("DDInitTookMoveKeysLock", self->ddId).log();
// AuditStorage does not rely on DatabaseConfiguration
// AuditStorage read neccessary info purely from system key space
if (!self->auditStorageInitStarted) {
// Avoid multiple initAuditStorages
self->addActor.send(self->initAuditStorage(self));
}
// It is possible that an audit request arrives and then DDMode
// is set to 2 at this point
// No polling MoveKeyLock is running
// So, we need to check MoveKeyLock when waitUntilDataDistributorExitSecurityMode
wait(waitUntilDataDistributorExitSecurityMode(self)); // Trap DDMode == 2
// It is possible DDMode begins with 2 and passes
// waitDataDistributorEnabled and then set to 0 before
// waitUntilDataDistributorExitSecurityMode. For this case,
// after waitUntilDataDistributorExitSecurityMode, DDMode is 0.
// The init loop does not break and the loop will stuct at
// waitDataDistributorEnabled in the next iteration.
TraceEvent("DataDistributorExitSecurityMode").log();
wait(self->loadDatabaseConfiguration());
self->initDcInfo();
TraceEvent("DDInitGotConfiguration", self->ddId)
.setMaxFieldLength(-1)
.detail("Conf", self->configuration.toString());
if (self->configuration.storageServerStoreType == KeyValueStoreType::SSD_SHARDED_ROCKSDB &&
!SERVER_KNOBS->SHARD_ENCODE_LOCATION_METADATA) {
TraceEvent(SevError, "PhysicalShardNotEnabledForShardedRocks", self->ddId)
.detail("EnableServerKnob", "SHARD_ENCODE_LOCATION_METADATA");
throw internal_error();
}
wait(self->updateReplicaKeys());
TraceEvent("DDInitUpdatedReplicaKeys", self->ddId).log();
wait(self->loadInitialDataDistribution());
if (self->initData->shards.size() > 1) {
TraceEvent("DDInitGotInitialDD", self->ddId)
.detail("B", self->initData->shards.end()[-2].key)
.detail("E", self->initData->shards.end()[-1].key)
.detail("Src", describe(self->initData->shards.end()[-2].primarySrc))
.detail("Dest", describe(self->initData->shards.end()[-2].primaryDest))
.trackLatest(self->initialDDEventHolder->trackingKey);
} else {
TraceEvent("DDInitGotInitialDD", self->ddId)
.detail("B", "")
.detail("E", "")
.detail("Src", "[no items]")
.detail("Dest", "[no items]")
.trackLatest(self->initialDDEventHolder->trackingKey);
}
if (self->initData->mode == 1 && self->context->isDDEnabled()) {
// mode may be set true by system operator using fdbcli and isEnabled() set to true
break;
}
TraceEvent("DataDistributionDisabled", self->ddId).log();
TraceEvent("MovingData", self->ddId)
.detail("InFlight", 0)
.detail("InQueue", 0)
.detail("AverageShardSize", -1)
.detail("UnhealthyRelocations", 0)
.detail("HighestPriority", 0)
.detail("BytesWritten", 0)
.detail("BytesWrittenAverageRate", 0)
.detail("PriorityRecoverMove", 0)
.detail("PriorityRebalanceUnderutilizedTeam", 0)
.detail("PriorityRebalannceOverutilizedTeam", 0)
.detail("PriorityTeamHealthy", 0)
.detail("PriorityTeamContainsUndesiredServer", 0)
.detail("PriorityTeamRedundant", 0)
.detail("PriorityMergeShard", 0)
.detail("PriorityTeamUnhealthy", 0)
.detail("PriorityTeam2Left", 0)
.detail("PriorityTeam1Left", 0)
.detail("PriorityTeam0Left", 0)
.detail("PrioritySplitShard", 0)
.trackLatest(self->movingDataEventHolder->trackingKey);
TraceEvent("TotalDataInFlight", self->ddId)
.detail("Primary", true)
.detail("TotalBytes", 0)
.detail("UnhealthyServers", 0)
.detail("HighestPriority", 0)
.trackLatest(self->totalDataInFlightEventHolder->trackingKey);
TraceEvent("TotalDataInFlight", self->ddId)
.detail("Primary", false)
.detail("TotalBytes", 0)
.detail("UnhealthyServers", 0)
.detail("HighestPriority", self->configuration.usableRegions > 1 ? 0 : -1)
.trackLatest(self->totalDataInFlightRemoteEventHolder->trackingKey);
wait(self->waitDataDistributorEnabled());
TraceEvent("DataDistributionEnabled").log();
}
return Void();
}
ACTOR static Future<Void> removeDataMoveTombstoneBackground(Reference<DataDistributor> self) {
state UID currentID;
try {
state Database cx = openDBOnServer(self->dbInfo, TaskPriority::DefaultEndpoint, LockAware::True);
state Transaction tr(cx);
loop {
try {
tr.setOption(FDBTransactionOptions::ACCESS_SYSTEM_KEYS);
tr.setOption(FDBTransactionOptions::PRIORITY_SYSTEM_IMMEDIATE);
for (UID& dataMoveID : self->initData->toCleanDataMoveTombstone) {
currentID = dataMoveID;
tr.clear(dataMoveKeyFor(currentID));
TraceEvent(SevDebug, "RemoveDataMoveTombstone", self->ddId).detail("DataMoveID", currentID);
}
wait(tr.commit());
break;
} catch (Error& e) {
wait(tr.onError(e));
}
}
} catch (Error& e) {
if (e.code() == error_code_actor_cancelled) {
throw;
}
TraceEvent(SevWarn, "RemoveDataMoveTombstoneError", self->ddId)
.errorUnsuppressed(e)
.detail("CurrentDataMoveID", currentID);
// DD needs not restart when removing tombstone gets failed unless this actor gets cancelled
// So, do not throw error
}
return Void();
}
ACTOR static Future<Void> resumeFromShards(Reference<DataDistributor> self, bool traceShard) {
// All physicalShard init must be completed before issuing data move
if (SERVER_KNOBS->SHARD_ENCODE_LOCATION_METADATA && SERVER_KNOBS->ENABLE_DD_PHYSICAL_SHARD) {
for (int i = 0; i < self->initData->shards.size() - 1; i++) {
const DDShardInfo& iShard = self->initData->shards[i];
KeyRangeRef keys = KeyRangeRef(iShard.key, self->initData->shards[i + 1].key);
std::vector<ShardsAffectedByTeamFailure::Team> teams;
teams.emplace_back(iShard.primarySrc, /*primary=*/true);
if (self->configuration.usableRegions > 1) {
teams.emplace_back(iShard.remoteSrc, /*primary=*/false);
}
self->physicalShardCollection->initPhysicalShardCollection(keys, teams, iShard.srcId.first(), 0);
}
}
state std::vector<Key> customBoundaries;
for (auto it : self->initData->userRangeConfig->ranges()) {
auto range = it->range();
customBoundaries.push_back(range.begin);
TraceEvent(SevDebug, "DDInitCustomRangeConfig", self->ddId)
.detail("Range", KeyRangeRef(range.begin, range.end))
.detail("Config", it->value());
}
state int shard = 0;
state int customBoundary = 0;
state int overreplicatedCount = 0;
for (; shard < self->initData->shards.size() - 1; shard++) {
const DDShardInfo& iShard = self->initData->shards[shard];
std::vector<KeyRangeRef> ranges;
Key beginKey = iShard.key;
Key endKey = self->initData->shards[shard + 1].key;
while (customBoundary < customBoundaries.size() && customBoundaries[customBoundary] <= beginKey) {
customBoundary++;
}
while (customBoundary < customBoundaries.size() && customBoundaries[customBoundary] < endKey) {
ranges.push_back(KeyRangeRef(beginKey, customBoundaries[customBoundary]));
beginKey = customBoundaries[customBoundary];
customBoundary++;
}
ranges.push_back(KeyRangeRef(beginKey, endKey));
std::vector<ShardsAffectedByTeamFailure::Team> teams;
teams.push_back(ShardsAffectedByTeamFailure::Team(iShard.primarySrc, true));
if (self->configuration.usableRegions > 1) {
teams.push_back(ShardsAffectedByTeamFailure::Team(iShard.remoteSrc, false));
}
for (int r = 0; r < ranges.size(); r++) {
auto& keys = ranges[r];
self->shardsAffectedByTeamFailure->defineShard(keys);
auto it = self->initData->userRangeConfig->rangeContaining(keys.begin);
int customReplicas =
std::max(self->configuration.storageTeamSize, it->value().replicationFactor.orDefault(0));
ASSERT_WE_THINK(KeyRangeRef(it->range().begin, it->range().end).contains(keys));
bool unhealthy = iShard.primarySrc.size() != customReplicas;
if (!unhealthy && self->configuration.usableRegions > 1) {
unhealthy = iShard.remoteSrc.size() != customReplicas;
}
if (!unhealthy && iShard.primarySrc.size() > self->configuration.storageTeamSize) {
if (++overreplicatedCount > SERVER_KNOBS->DD_MAX_SHARDS_ON_LARGE_TEAMS) {
unhealthy = true;
}
}
if (traceShard) {
TraceEvent(SevDebug, "DDInitShard", self->ddId)
.detail("Keys", keys)
.detail("PrimarySrc", describe(iShard.primarySrc))
.detail("RemoteSrc", describe(iShard.remoteSrc))
.detail("PrimaryDest", describe(iShard.primaryDest))
.detail("RemoteDest", describe(iShard.remoteDest))
.detail("SrcID", iShard.srcId)
.detail("DestID", iShard.destId)
.detail("CustomReplicas", customReplicas)
.detail("StorageTeamSize", self->configuration.storageTeamSize)
.detail("Unhealthy", unhealthy)
.detail("Overreplicated", overreplicatedCount);
}
self->shardsAffectedByTeamFailure->moveShard(keys, teams);
if ((ddLargeTeamEnabled() && (unhealthy || r > 0)) ||
(iShard.hasDest && iShard.destId == anonymousShardId)) {
// This shard is already in flight. Ideally we should use dest in ShardsAffectedByTeamFailure and
// generate a dataDistributionRelocator directly in DataDistributionQueue to track it, but it's
// easier to just (with low priority) schedule it for movement.
DataMovementReason reason = DataMovementReason::RECOVER_MOVE;
if (unhealthy) {
reason = DataMovementReason::TEAM_UNHEALTHY;
} else if (r > 0) {
reason = DataMovementReason::SPLIT_SHARD;
}
self->relocationProducer.send(RelocateShard(keys, reason, RelocateReason::OTHER));
}
}
wait(yield(TaskPriority::DataDistribution));
}
return Void();
}
// TODO: unit test needed
ACTOR static Future<Void> resumeFromDataMoves(Reference<DataDistributor> self, Future<Void> readyToStart) {
state KeyRangeMap<std::shared_ptr<DataMove>>::iterator it = self->initData->dataMoveMap.ranges().begin();
wait(readyToStart);
for (; it != self->initData->dataMoveMap.ranges().end(); ++it) {
const DataMoveMetaData& meta = it.value()->meta;
if (meta.ranges.empty()) {
TraceEvent(SevInfo, "EmptyDataMoveRange", self->ddId).detail("DataMoveMetaData", meta.toString());
continue;
}
if (it.value()->isCancelled() || (it.value()->valid && !SERVER_KNOBS->SHARD_ENCODE_LOCATION_METADATA)) {
RelocateShard rs(meta.ranges.front(), DataMovementReason::RECOVER_MOVE, RelocateReason::OTHER);
rs.dataMoveId = meta.id;
rs.cancelled = true;
self->relocationProducer.send(rs);
TraceEvent("DDInitScheduledCancelDataMove", self->ddId).detail("DataMove", meta.toString());
} else if (it.value()->valid) {
TraceEvent(SevDebug, "DDInitFoundDataMove", self->ddId).detail("DataMove", meta.toString());
ASSERT(meta.ranges.front() == it.range());
// TODO: Persist priority in DataMoveMetaData.
RelocateShard rs(meta.ranges.front(), DataMovementReason::RECOVER_MOVE, RelocateReason::OTHER);
rs.dataMoveId = meta.id;
rs.dataMove = it.value();
std::vector<ShardsAffectedByTeamFailure::Team> teams;
teams.push_back(ShardsAffectedByTeamFailure::Team(rs.dataMove->primaryDest, true));
if (!rs.dataMove->remoteDest.empty()) {
teams.push_back(ShardsAffectedByTeamFailure::Team(rs.dataMove->remoteDest, false));
}
// Since a DataMove could cover more than one keyrange, e.g., during merge, we need to define
// the target shard and restart the shard tracker.
self->shardsAffectedByTeamFailure->restartShardTracker.send(rs.keys);
self->shardsAffectedByTeamFailure->defineShard(rs.keys);
// When restoring a DataMove, the destination team is determined, and hence we need to register
// the data move now, so that team failures can be captured.
self->shardsAffectedByTeamFailure->moveShard(rs.keys, teams);
self->relocationProducer.send(rs);
wait(yield(TaskPriority::DataDistribution));
}
}
// Trigger background cleanup for datamove tombstones
self->addActor.send((self->removeDataMoveTombstoneBackground(self)));
return Void();
}
// Resume inflight relocations from the previous DD
// TODO: The initialDataDistribution is unused once resumeRelocations,
// DataDistributionTracker::trackInitialShards, and DDTeamCollection::init are done. In the future, we can release
// the object to save memory usage if it turns out to be a problem.
Future<Void> resumeRelocations() {
ASSERT(shardsAffectedByTeamFailure); // has to be allocated
Future<Void> shardsReady = resumeFromShards(Reference<DataDistributor>::addRef(this), g_network->isSimulated());
return resumeFromDataMoves(Reference<DataDistributor>::addRef(this), shardsReady);
}
Future<Void> pollMoveKeysLock() { return txnProcessor->pollMoveKeysLock(lock, context->ddEnabledState.get()); }
Future<bool> isDataDistributionEnabled() const {
return txnProcessor->isDataDistributionEnabled(context->ddEnabledState.get());
}
Future<Void> removeKeysFromFailedServer(const UID& serverID, const std::vector<UID>& teamForDroppedRange) const {
return txnProcessor->removeKeysFromFailedServer(
serverID, teamForDroppedRange, lock, context->ddEnabledState.get());
}
Future<Void> removeStorageServer(const UID& serverID, const Optional<UID>& tssPairID = Optional<UID>()) const {
return txnProcessor->removeStorageServer(serverID, tssPairID, lock, context->ddEnabledState.get());
}
};
inline void addAuditToAuditMap(Reference<DataDistributor> self, std::shared_ptr<DDAudit> audit) {
AuditType auditType = audit->coreState.getType();
UID auditID = audit->coreState.id;
TraceEvent(SevDebug, "AuditMapOps", self->ddId)
.detail("Ops", "addAuditToAuditMap")
.detail("AuditType", auditType)
.detail("AuditID", auditID);
ASSERT(!self->audits[auditType].contains(auditID));
self->audits[auditType][auditID] = audit;
return;
}
inline std::shared_ptr<DDAudit> getAuditFromAuditMap(Reference<DataDistributor> self,
AuditType auditType,
UID auditID) {
TraceEvent(SevDebug, "AuditMapOps", self->ddId)
.detail("Ops", "getAuditFromAuditMap")
.detail("AuditType", auditType)
.detail("AuditID", auditID);
ASSERT(self->audits.contains(auditType) && self->audits[auditType].contains(auditID));
return self->audits[auditType][auditID];
}
inline void removeAuditFromAuditMap(Reference<DataDistributor> self, AuditType auditType, UID auditID) {
ASSERT(self->audits.contains(auditType) && self->audits[auditType].contains(auditID));
std::shared_ptr<DDAudit> audit = self->audits[auditType][auditID];
audit->cancel();
self->audits[auditType].erase(auditID);
TraceEvent(SevDebug, "AuditMapOps", self->ddId)
.detail("Ops", "removeAuditFromAuditMap")
.detail("AuditType", auditType)
.detail("AuditID", auditID);
return;
}
inline bool auditExistInAuditMap(Reference<DataDistributor> self, AuditType auditType, UID auditID) {
return self->audits.contains(auditType) && self->audits[auditType].contains(auditID);
}
inline bool existAuditInAuditMapForType(Reference<DataDistributor> self, AuditType auditType) {
return self->audits.contains(auditType) && !self->audits[auditType].empty();
}
inline std::unordered_map<UID, std::shared_ptr<DDAudit>> getAuditsForType(Reference<DataDistributor> self,
AuditType auditType) {
ASSERT(self->audits.contains(auditType));
return self->audits[auditType];
}
// Periodically check and log the physicalShard status; clean up empty physicalShard;
ACTOR Future<Void> monitorPhysicalShardStatus(Reference<PhysicalShardCollection> self) {
ASSERT(SERVER_KNOBS->SHARD_ENCODE_LOCATION_METADATA);
ASSERT(SERVER_KNOBS->ENABLE_DD_PHYSICAL_SHARD);
loop {
self->cleanUpPhysicalShardCollection();
self->logPhysicalShardCollection();
wait(delay(SERVER_KNOBS->PHYSICAL_SHARD_METRICS_DELAY));
}
}
// Runs the data distribution algorithm for FDB, including the DD Queue, DD tracker, and DD team collection
ACTOR Future<Void> dataDistribution(Reference<DataDistributor> self,
PromiseStream<GetMetricsListRequest> getShardMetricsList) {
state Database cx = openDBOnServer(self->dbInfo, TaskPriority::DataDistributionLaunch, LockAware::True);
cx->locationCacheSize = SERVER_KNOBS->DD_LOCATION_CACHE_SIZE;
self->txnProcessor = Reference<IDDTxnProcessor>(new DDTxnProcessor(cx));
// cx->setOption( FDBDatabaseOptions::LOCATION_CACHE_SIZE, StringRef((uint8_t*)
// &SERVER_KNOBS->DD_LOCATION_CACHE_SIZE, 8) ); ASSERT( cx->locationCacheSize ==
// SERVER_KNOBS->DD_LOCATION_CACHE_SIZE
// );
// wait(debugCheckCoalescing(cx));
// FIXME: wrap the bootstrap process into class DataDistributor
state Reference<DDTeamCollection> primaryTeamCollection;
state Reference<DDTeamCollection> remoteTeamCollection;
state bool trackerCancelled;
// Start watching for changes before reading the config in init() below
state Promise<Version> configChangeWatching;
state Future<Void> onConfigChange =
map(DDConfiguration().trigger.onChange(SystemDBWriteLockedNow(cx.getReference()), {}, configChangeWatching),
[](Version v) {
CODE_PROBE(true, "DataDistribution change detected");
TraceEvent("DataDistributionConfigChanged").detail("ChangeVersion", v);
throw dd_config_changed();
return Void();
});
// Make sure that the watcher has established a baseline before init() below so the watcher will
// see any changes that occur after init() has read the config state.
wait(success(configChangeWatching.getFuture()));
loop {
trackerCancelled = false;
// whether all initial shard are tracked
self->initialized = Promise<Void>();
// Stored outside of data distribution tracker to avoid slow tasks
// when tracker is cancelled
state KeyRangeMap<ShardTrackedData> shards;
state Promise<UID> removeFailedServer;
try {
wait(DataDistributor::init(self));
// When/If this assertion fails, Evan owes Ben a pat on the back for his foresight
ASSERT(self->configuration.storageTeamSize > 0);
state PromiseStream<Promise<int64_t>> getAverageShardBytes;
state PromiseStream<Promise<int>> getUnhealthyRelocationCount;
state PromiseStream<GetMetricsRequest> getShardMetrics;
state PromiseStream<GetTopKMetricsRequest> getTopKShardMetrics;
state Reference<AsyncVar<bool>> processingUnhealthy(new AsyncVar<bool>(false));
state Reference<AsyncVar<bool>> processingWiggle(new AsyncVar<bool>(false));
if (SERVER_KNOBS->DD_TENANT_AWARENESS_ENABLED || SERVER_KNOBS->STORAGE_QUOTA_ENABLED) {
self->ddTenantCache = makeReference<TenantCache>(cx, self->ddId);
wait(self->ddTenantCache.get()->build());
}
self->shardsAffectedByTeamFailure = makeReference<ShardsAffectedByTeamFailure>();
self->physicalShardCollection = makeReference<PhysicalShardCollection>(self->txnProcessor);
wait(self->resumeRelocations());
std::vector<TeamCollectionInterface> tcis; // primary and remote region interface
Reference<AsyncVar<bool>> anyZeroHealthyTeams; // true if primary or remote has zero healthy team
std::vector<Reference<AsyncVar<bool>>> zeroHealthyTeams; // primary and remote
tcis.push_back(TeamCollectionInterface());
zeroHealthyTeams.push_back(makeReference<AsyncVar<bool>>(true));
int replicaSize = self->configuration.storageTeamSize;
std::vector<Future<Void>> actors; // the container of ACTORs
actors.push_back(onConfigChange);
if (self->configuration.usableRegions > 1) {
tcis.push_back(TeamCollectionInterface());
replicaSize = 2 * self->configuration.storageTeamSize;
zeroHealthyTeams.push_back(makeReference<AsyncVar<bool>>(true));
anyZeroHealthyTeams = makeReference<AsyncVar<bool>>(true);
actors.push_back(anyTrue(zeroHealthyTeams, anyZeroHealthyTeams));
} else {
anyZeroHealthyTeams = zeroHealthyTeams[0];
}
actors.push_back(self->pollMoveKeysLock());
auto shardTracker = makeReference<DataDistributionTracker>(
DataDistributionTrackerInitParams{ .db = self->txnProcessor,
.distributorId = self->ddId,
.readyToStart = self->initialized,
.output = self->relocationProducer,
.shardsAffectedByTeamFailure = self->shardsAffectedByTeamFailure,
.physicalShardCollection = self->physicalShardCollection,
.anyZeroHealthyTeams = anyZeroHealthyTeams,
.shards = &shards,
.trackerCancelled = &trackerCancelled,
.ddTenantCache = self->ddTenantCache });
actors.push_back(reportErrorsExcept(DataDistributionTracker::run(shardTracker,
self->initData,
getShardMetrics.getFuture(),
getTopKShardMetrics.getFuture(),
getShardMetricsList.getFuture(),
getAverageShardBytes.getFuture()),
"DDTracker",
self->ddId,
&normalDDQueueErrors()));
auto ddQueue = makeReference<DDQueue>(
DDQueueInitParams{ .id = self->ddId,
.lock = self->lock,
.db = self->txnProcessor,
.teamCollections = tcis,