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foundationdb/fdbserver/ApplyMetadataMutation.cpp

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/*
* ApplyMetadataMutation.cpp
*
* This source file is part of the FoundationDB open source project
*
* Copyright 2013-2019 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 "fdbclient/BackupAgent.actor.h"
#include "fdbclient/KeyBackedTypes.h" // for key backed map codecs for tss mapping
#include "fdbclient/MutationList.h"
#include "fdbclient/Notified.h"
#include "fdbclient/SystemData.h"
#include "fdbserver/ApplyMetadataMutation.h"
#include "fdbserver/IKeyValueStore.h"
#include "fdbserver/LogProtocolMessage.h"
#include "fdbserver/LogSystem.h"
Reference<StorageInfo> getStorageInfo(UID id,
std::map<UID, Reference<StorageInfo>>* storageCache,
IKeyValueStore* txnStateStore) {
Reference<StorageInfo> storageInfo;
auto cacheItr = storageCache->find(id);
if (cacheItr == storageCache->end()) {
storageInfo = makeReference<StorageInfo>();
storageInfo->tag = decodeServerTagValue(txnStateStore->readValue(serverTagKeyFor(id)).get().get());
storageInfo->interf = decodeServerListValue(txnStateStore->readValue(serverListKeyFor(id)).get().get());
(*storageCache)[id] = storageInfo;
} else {
storageInfo = cacheItr->second;
}
return storageInfo;
}
namespace {
inline bool isSystemKey(KeyRef key) {
return key.size() && key[0] == systemKeys.begin[0];
}
// It is incredibly important that any modifications to txnStateStore are done in such a way that the same operations
// will be done on all commit proxies at the same time. Otherwise, the data stored in txnStateStore will become
// corrupted.
class ApplyMetadataMutationsImpl {
public:
ApplyMetadataMutationsImpl(const SpanID& spanContext_,
const UID& dbgid_,
Arena& arena_,
const VectorRef<MutationRef>& mutations_,
IKeyValueStore* txnStateStore_)
: spanContext(spanContext_), dbgid(dbgid_), arena(arena_), mutations(mutations_), txnStateStore(txnStateStore_),
confChange(dummyConfChange) {}
ApplyMetadataMutationsImpl(const SpanID& spanContext_,
Arena& arena_,
const VectorRef<MutationRef>& mutations_,
ProxyCommitData& proxyCommitData_,
Reference<ILogSystem> logSystem_,
LogPushData* toCommit_,
bool& confChange_,
Version popVersion_,
bool initialCommit_)
: spanContext(spanContext_), dbgid(proxyCommitData_.dbgid), arena(arena_), mutations(mutations_),
txnStateStore(proxyCommitData_.txnStateStore), toCommit(toCommit_), confChange(confChange_),
logSystem(logSystem_), popVersion(popVersion_), vecBackupKeys(&proxyCommitData_.vecBackupKeys),
keyInfo(&proxyCommitData_.keyInfo), cacheInfo(&proxyCommitData_.cacheInfo),
uid_applyMutationsData(proxyCommitData_.firstProxy ? &proxyCommitData_.uid_applyMutationsData : nullptr),
commit(proxyCommitData_.commit), cx(proxyCommitData_.cx), commitVersion(&proxyCommitData_.committedVersion),
storageCache(&proxyCommitData_.storageCache), tag_popped(&proxyCommitData_.tag_popped),
tssMapping(&proxyCommitData_.tssMapping), initialCommit(initialCommit_) {}
private:
// The following variables are incoming parameters
const SpanID& spanContext;
const UID& dbgid;
Arena& arena;
const VectorRef<MutationRef>& mutations;
// Transaction KV store
IKeyValueStore* txnStateStore;
// non-null if these mutations were part of a new commit handled by this commit proxy
LogPushData* toCommit = nullptr;
// Flag indicates if the configure is changed
bool& confChange;
Reference<ILogSystem> logSystem = Reference<ILogSystem>();
Version popVersion = 0;
KeyRangeMap<std::set<Key>>* vecBackupKeys = nullptr;
KeyRangeMap<ServerCacheInfo>* keyInfo = nullptr;
KeyRangeMap<bool>* cacheInfo = nullptr;
std::map<Key, ApplyMutationsData>* uid_applyMutationsData = nullptr;
RequestStream<CommitTransactionRequest> commit = RequestStream<CommitTransactionRequest>();
Database cx = Database();
NotifiedVersion* commitVersion = nullptr;
std::map<UID, Reference<StorageInfo>>* storageCache = nullptr;
std::map<Tag, Version>* tag_popped = nullptr;
std::unordered_map<UID, StorageServerInterface>* tssMapping = nullptr;
// true if the mutations were already written to the txnStateStore as part of recovery
bool initialCommit = false;
private:
// The following variables are used internally
std::map<KeyRef, MutationRef> cachedRangeInfo;
// Testing Storage Server removal (clearing serverTagKey) needs to read tss server list value to determine it is a
// tss + find partner's tag to send the private mutation. Since the removeStorageServer transaction clears both the
// storage list and server tag, we have to enforce ordering, proccessing the server tag first, and postpone the
// server list clear until the end;
std::vector<KeyRangeRef> tssServerListToRemove;
// Similar to tssServerListToRemove, the TSS mapping change key needs to read the server list at the end of the
// commit
std::vector<std::pair<UID, UID>> tssMappingToAdd;
private:
bool dummyConfChange = false;
private:
void checkSetKeyServersPrefix(MutationRef m) {
if (!m.param1.startsWith(keyServersPrefix)) {
return;
}
if (!initialCommit)
txnStateStore->set(KeyValueRef(m.param1, m.param2));
if (!keyInfo) {
return;
}
KeyRef k = m.param1.removePrefix(keyServersPrefix);
if (k == allKeys.end) {
return;
}
KeyRef end = keyInfo->rangeContaining(k).end();
KeyRangeRef insertRange(k, end);
std::vector<UID> src, dest;
// txnStateStore is always an in-memory KVS, and must always be recovered before
// applyMetadataMutations is called, so a wait here should never be needed.
Future<RangeResult> fResult = txnStateStore->readRange(serverTagKeys);
decodeKeyServersValue(fResult.get(), m.param2, src, dest);
ASSERT(storageCache);
ServerCacheInfo info;
info.tags.reserve(src.size() + dest.size());
info.src_info.reserve(src.size());
info.dest_info.reserve(dest.size());
for (const auto& id : src) {
auto storageInfo = getStorageInfo(id, storageCache, txnStateStore);
ASSERT(!storageInfo->interf.isTss());
ASSERT(storageInfo->tag != invalidTag);
info.tags.push_back(storageInfo->tag);
info.src_info.push_back(storageInfo);
}
for (const auto& id : dest) {
auto storageInfo = getStorageInfo(id, storageCache, txnStateStore);
ASSERT(!storageInfo->interf.isTss());
ASSERT(storageInfo->tag != invalidTag);
info.tags.push_back(storageInfo->tag);
info.dest_info.push_back(storageInfo);
}
uniquify(info.tags);
keyInfo->insert(insertRange, info);
}
void checkSetServerKeysPrefix(MutationRef m) {
if (!m.param1.startsWith(serverKeysPrefix)) {
return;
}
if (toCommit) {
Tag tag = decodeServerTagValue(
txnStateStore->readValue(serverTagKeyFor(serverKeysDecodeServer(m.param1))).get().get());
MutationRef privatized = m;
privatized.param1 = m.param1.withPrefix(systemKeys.begin, arena);
TraceEvent(SevDebug, "SendingPrivateMutation", dbgid)
.detail("Original", m)
.detail("Privatized", privatized)
.detail("Server", serverKeysDecodeServer(m.param1))
.detail("TagKey", serverTagKeyFor(serverKeysDecodeServer(m.param1)))
.detail("Tag", tag.toString());
toCommit->addTag(tag);
toCommit->writeTypedMessage(privatized);
}
}
void checkSetServerTagsPrefix(MutationRef m) {
if (!m.param1.startsWith(serverTagPrefix)) {
return;
}
UID id = decodeServerTagKey(m.param1);
Tag tag = decodeServerTagValue(m.param2);
if (toCommit) {
MutationRef privatized = m;
privatized.param1 = m.param1.withPrefix(systemKeys.begin, arena);
TraceEvent("ServerTag", dbgid).detail("Server", id).detail("Tag", tag.toString());
toCommit->addTag(tag);
toCommit->writeTypedMessage(LogProtocolMessage(), true);
toCommit->addTag(tag);
toCommit->writeTypedMessage(privatized);
}
if (!initialCommit) {
txnStateStore->set(KeyValueRef(m.param1, m.param2));
if (storageCache) {
auto cacheItr = storageCache->find(id);
if (cacheItr == storageCache->end()) {
Reference<StorageInfo> storageInfo = makeReference<StorageInfo>();
storageInfo->tag = tag;
Optional<Key> interfKey = txnStateStore->readValue(serverListKeyFor(id)).get();
if (interfKey.present()) {
storageInfo->interf = decodeServerListValue(interfKey.get());
}
(*storageCache)[id] = storageInfo;
} else {
cacheItr->second->tag = tag;
// These tag vectors will be repopulated by the proxy when it detects their sizes are 0.
for (auto& it : keyInfo->ranges()) {
it.value().tags.clear();
}
}
}
}
}
void checkSetStorageCachePrefix(MutationRef m) {
if (!m.param1.startsWith(storageCachePrefix))
return;
if (cacheInfo) {
KeyRef k = m.param1.removePrefix(storageCachePrefix);
// Create a private mutation for storage servers
// This is done to make the storage servers aware of the cached key-ranges
if (toCommit) {
MutationRef privatized = m;
privatized.param1 = m.param1.withPrefix(systemKeys.begin, arena);
//TraceEvent(SevDebug, "SendingPrivateMutation", dbgid).detail("Original", m.toString()).detail("Privatized", privatized.toString());
cachedRangeInfo[k] = privatized;
}
if (k != allKeys.end) {
KeyRef end = cacheInfo->rangeContaining(k).end();
std::vector<uint16_t> serverIndices;
decodeStorageCacheValue(m.param2, serverIndices);
cacheInfo->insert(KeyRangeRef(k, end), serverIndices.size() > 0);
}
}
if (!initialCommit)
txnStateStore->set(KeyValueRef(m.param1, m.param2));
}
void checkSetCacheKeysPrefix(MutationRef m) {
if (!m.param1.startsWith(cacheKeysPrefix) || toCommit == nullptr) {
return;
}
// Create a private mutation for cache servers
// This is done to make the cache servers aware of the cached key-ranges
MutationRef privatized = m;
privatized.param1 = m.param1.withPrefix(systemKeys.begin, arena);
toCommit->addTag(cacheTag);
toCommit->writeTypedMessage(privatized);
}
void checkSetConfigKeys(MutationRef m) {
if (!m.param1.startsWith(configKeysPrefix) && m.param1 != coordinatorsKey) {
return;
}
if (Optional<StringRef>(m.param2) !=
txnStateStore->readValue(m.param1)
.get()
.castTo<StringRef>()) { // FIXME: Make this check more specific, here or by reading
// configuration whenever there is a change
if ((!m.param1.startsWith(excludedServersPrefix) && m.param1 != excludedServersVersionKey) &&
(!m.param1.startsWith(failedServersPrefix) && m.param1 != failedServersVersionKey) &&
(!m.param1.startsWith(excludedLocalityPrefix) && m.param1 != excludedLocalityVersionKey) &&
(!m.param1.startsWith(failedLocalityPrefix) && m.param1 != failedLocalityVersionKey)) {
auto t = txnStateStore->readValue(m.param1).get();
TraceEvent("MutationRequiresRestart", dbgid)
.detail("M", m)
.detail("PrevValue", t.orDefault("(none)"_sr))
.detail("ToCommit", toCommit != nullptr);
confChange = true;
}
}
if (!initialCommit)
txnStateStore->set(KeyValueRef(m.param1, m.param2));
}
void checkSetChangeFeedPrefix(MutationRef m) {
if (!m.param1.startsWith(changeFeedPrefix)) {
return;
}
if (toCommit && keyInfo) {
KeyRange r = std::get<0>(decodeChangeFeedValue(m.param2));
MutationRef privatized = m;
privatized.param1 = m.param1.withPrefix(systemKeys.begin, arena);
auto ranges = keyInfo->intersectingRanges(r);
auto firstRange = ranges.begin();
++firstRange;
if (firstRange == ranges.end()) {
ranges.begin().value().populateTags();
toCommit->addTags(ranges.begin().value().tags);
} else {
std::set<Tag> allSources;
for (auto r : ranges) {
r.value().populateTags();
allSources.insert(r.value().tags.begin(), r.value().tags.end());
}
toCommit->addTags(allSources);
}
toCommit->writeTypedMessage(privatized);
}
}
void checkSetServerListPrefix(MutationRef m) {
if (!m.param1.startsWith(serverListPrefix)) {
return;
}
if (!initialCommit) {
txnStateStore->set(KeyValueRef(m.param1, m.param2));
if (storageCache) {
UID id = decodeServerListKey(m.param1);
StorageServerInterface interf = decodeServerListValue(m.param2);
auto cacheItr = storageCache->find(id);
if (cacheItr == storageCache->end()) {
Reference<StorageInfo> storageInfo = makeReference<StorageInfo>();
storageInfo->interf = interf;
Optional<Key> tagKey = txnStateStore->readValue(serverTagKeyFor(id)).get();
if (tagKey.present()) {
storageInfo->tag = decodeServerTagValue(tagKey.get());
}
(*storageCache)[id] = storageInfo;
} else {
cacheItr->second->interf = interf;
}
}
}
}
void checkSetTSSMappingKeys(MutationRef m) {
if (!m.param1.startsWith(tssMappingKeys.begin)) {
return;
}
// Normally uses key backed map, so have to use same unpacking code here.
UID ssId = Codec<UID>::unpack(Tuple::unpack(m.param1.removePrefix(tssMappingKeys.begin)));
UID tssId = Codec<UID>::unpack(Tuple::unpack(m.param2));
if (!initialCommit) {
txnStateStore->set(KeyValueRef(m.param1, m.param2));
}
if (tssMapping) {
tssMappingToAdd.push_back(std::pair(ssId, tssId));
}
if (toCommit) {
// send private mutation to SS that it now has a TSS pair
MutationRef privatized = m;
privatized.param1 = m.param1.withPrefix(systemKeys.begin, arena);
Optional<Value> tagV = txnStateStore->readValue(serverTagKeyFor(ssId)).get();
if (tagV.present()) {
toCommit->addTag(decodeServerTagValue(tagV.get()));
toCommit->writeTypedMessage(privatized);
}
}
}
void checkSetTSSQuarantineKeys(MutationRef m) {
if (!m.param1.startsWith(tssQuarantineKeys.begin) || initialCommit) {
return;
}
txnStateStore->set(KeyValueRef(m.param1, m.param2));
if (!toCommit) {
return;
}
UID tssId = decodeTssQuarantineKey(m.param1);
Optional<Value> ssiV = txnStateStore->readValue(serverListKeyFor(tssId)).get();
if (!ssiV.present()) {
return;
}
StorageServerInterface ssi = decodeServerListValue(ssiV.get());
if (!ssi.isTss()) {
return;
}
Optional<Value> tagV = txnStateStore->readValue(serverTagKeyFor(ssi.tssPairID.get())).get();
if (tagV.present()) {
MutationRef privatized = m;
privatized.param1 = m.param1.withPrefix(systemKeys.begin, arena);
toCommit->addTag(decodeServerTagValue(tagV.get()));
toCommit->writeTypedMessage(privatized);
}
}
void checkSetApplyMutationsEndRange(MutationRef m) {
if (!m.param1.startsWith(applyMutationsEndRange.begin)) {
return;
}
if (!initialCommit)
txnStateStore->set(KeyValueRef(m.param1, m.param2));
if (uid_applyMutationsData == nullptr) {
return;
}
Key uid = m.param1.removePrefix(applyMutationsEndRange.begin);
auto& p = (*uid_applyMutationsData)[uid];
p.endVersion = BinaryReader::fromStringRef<Version>(m.param2, Unversioned());
if (p.keyVersion == Reference<KeyRangeMap<Version>>())
p.keyVersion = makeReference<KeyRangeMap<Version>>();
if (p.worker.isValid() && !p.worker.isReady()) {
return;
}
auto addPrefixValue = txnStateStore->readValue(uid.withPrefix(applyMutationsAddPrefixRange.begin)).get();
auto removePrefixValue = txnStateStore->readValue(uid.withPrefix(applyMutationsRemovePrefixRange.begin)).get();
auto beginValue = txnStateStore->readValue(uid.withPrefix(applyMutationsBeginRange.begin)).get();
p.worker = applyMutations(
cx,
uid,
addPrefixValue.present() ? addPrefixValue.get() : Key(),
removePrefixValue.present() ? removePrefixValue.get() : Key(),
beginValue.present() ? BinaryReader::fromStringRef<Version>(beginValue.get(), Unversioned()) : 0,
&p.endVersion,
commit,
commitVersion,
p.keyVersion);
}
void checkSetApplyMutationsKeyVersionMapRange(MutationRef m) {
if (!m.param1.startsWith(applyMutationsKeyVersionMapRange.begin)) {
return;
}
if (!initialCommit)
txnStateStore->set(KeyValueRef(m.param1, m.param2));
if (uid_applyMutationsData == nullptr) {
return;
}
if (m.param1.size() >= applyMutationsKeyVersionMapRange.begin.size() + sizeof(UID)) {
Key uid = m.param1.substr(applyMutationsKeyVersionMapRange.begin.size(), sizeof(UID));
Key k = m.param1.substr(applyMutationsKeyVersionMapRange.begin.size() + sizeof(UID));
auto& p = (*uid_applyMutationsData)[uid];
if (p.keyVersion == Reference<KeyRangeMap<Version>>())
p.keyVersion = makeReference<KeyRangeMap<Version>>();
p.keyVersion->rawInsert(k, BinaryReader::fromStringRef<Version>(m.param2, Unversioned()));
}
}
void checkSetLogRangesRange(MutationRef m) {
if (!m.param1.startsWith(logRangesRange.begin)) {
return;
}
if (!initialCommit)
txnStateStore->set(KeyValueRef(m.param1, m.param2));
if (!vecBackupKeys) {
return;
}
Key logDestination;
KeyRef logRangeBegin = logRangesDecodeKey(m.param1, nullptr);
Key logRangeEnd = logRangesDecodeValue(m.param2, &logDestination);
// Insert the logDestination into each range of vecBackupKeys overlapping the decoded range
for (auto& logRange : vecBackupKeys->modify(KeyRangeRef(logRangeBegin, logRangeEnd))) {
logRange->value().insert(logDestination);
}
for (auto& logRange : vecBackupKeys->modify(singleKeyRange(metadataVersionKey))) {
logRange->value().insert(logDestination);
}
TraceEvent("LogRangeAdd")
.detail("LogRanges", vecBackupKeys->size())
.detail("MutationKey", m.param1)
.detail("LogRangeBegin", logRangeBegin)
.detail("LogRangeEnd", logRangeEnd);
}
void checkSetGlobalKeys(MutationRef m) {
if (!m.param1.startsWith(globalKeysPrefix)) {
return;
}
if (!toCommit) {
return;
}
// Notifies all servers that a Master's server epoch ends
auto allServers = txnStateStore->readRange(serverTagKeys).get();
std::set<Tag> allTags;
if (m.param1 == killStorageKey) {
int8_t safeLocality = BinaryReader::fromStringRef<int8_t>(m.param2, Unversioned());
for (auto& kv : allServers) {
Tag t = decodeServerTagValue(kv.value);
if (t.locality != safeLocality) {
allTags.insert(t);
}
}
} else {
for (auto& kv : allServers) {
allTags.insert(decodeServerTagValue(kv.value));
}
}
allTags.insert(cacheTag);
if (m.param1 == lastEpochEndKey) {
toCommit->addTags(allTags);
toCommit->writeTypedMessage(LogProtocolMessage(), true);
}
MutationRef privatized = m;
privatized.param1 = m.param1.withPrefix(systemKeys.begin, arena);
toCommit->addTags(allTags);
toCommit->writeTypedMessage(privatized);
}
void checkSetOtherKeys(MutationRef m) {
if (initialCommit)
return;
if (m.param1 == databaseLockedKey || m.param1 == metadataVersionKey ||
m.param1 == mustContainSystemMutationsKey || m.param1.startsWith(applyMutationsBeginRange.begin) ||
m.param1.startsWith(applyMutationsAddPrefixRange.begin) ||
m.param1.startsWith(applyMutationsRemovePrefixRange.begin) || m.param1.startsWith(tagLocalityListPrefix) ||
m.param1.startsWith(serverTagHistoryPrefix) ||
m.param1.startsWith(testOnlyTxnStateStorePrefixRange.begin) || m.param1 == clusterIdKey) {
txnStateStore->set(KeyValueRef(m.param1, m.param2));
}
}
void checkSetMinRequiredCommitVersionKey(MutationRef m) {
if (m.param1 != minRequiredCommitVersionKey) {
return;
}
Version requested = BinaryReader::fromStringRef<Version>(m.param2, Unversioned());
TraceEvent("MinRequiredCommitVersion", dbgid).detail("Min", requested).detail("Current", popVersion);
if (!initialCommit)
txnStateStore->set(KeyValueRef(m.param1, m.param2));
confChange = true;
TEST(true); // Recovering at a higher version.
}
void checkSetWriteRecoverKey(MutationRef m) {
if (m.param1 != writeRecoveryKey) {
return;
}
TraceEvent("WriteRecoveryKeySet", dbgid).log();
if (!initialCommit)
txnStateStore->set(KeyValueRef(m.param1, m.param2));
TEST(true); // Snapshot created, setting writeRecoveryKey in txnStateStore
}
void checkClearKeyServerKeys(KeyRangeRef range) {
if (!keyServersKeys.intersects(range)) {
return;
}
KeyRangeRef r = range & keyServersKeys;
if (keyInfo) {
KeyRangeRef clearRange(r.begin.removePrefix(keyServersPrefix), r.end.removePrefix(keyServersPrefix));
keyInfo->insert(clearRange,
clearRange.begin == StringRef()
? ServerCacheInfo()
: keyInfo->rangeContainingKeyBefore(clearRange.begin).value());
}
if (!initialCommit)
txnStateStore->clear(r);
}
void checkClearConfigKeys(MutationRef m, KeyRangeRef range) {
if (!configKeys.intersects(range)) {
return;
}
if (!initialCommit)
txnStateStore->clear(range & configKeys);
if (!excludedServersKeys.contains(range) && !failedServersKeys.contains(range) &&
!excludedLocalityKeys.contains(range) && !failedLocalityKeys.contains(range)) {
TraceEvent("MutationRequiresRestart", dbgid).detail("M", m);
confChange = true;
}
}
void checkClearServerListKeys(KeyRangeRef range) {
if (!serverListKeys.intersects(range)) {
return;
}
if (initialCommit) {
return;
}
KeyRangeRef rangeToClear = range & serverListKeys;
if (rangeToClear.singleKeyRange()) {
UID id = decodeServerListKey(rangeToClear.begin);
Optional<Value> ssiV = txnStateStore->readValue(serverListKeyFor(id)).get();
if (ssiV.present() && decodeServerListValue(ssiV.get()).isTss()) {
tssServerListToRemove.push_back(rangeToClear);
} else {
txnStateStore->clear(rangeToClear);
}
} else {
txnStateStore->clear(rangeToClear);
}
}
void checkClearTagLocalityListKeys(KeyRangeRef range) {
if (!tagLocalityListKeys.intersects(range)) {
return;
}
if (initialCommit) {
return;
}
txnStateStore->clear(range & tagLocalityListKeys);
}
void checkClearServerTagKeys(MutationRef m, KeyRangeRef range) {
if (!serverTagKeys.intersects(range)) {
return;
}
// Storage server removal always happens in a separate version from any prior writes (or any subsequent
// reuse of the tag) so we can safely destroy the tag here without any concern about intra-batch
// ordering
if (logSystem && popVersion) {
auto serverKeysCleared =
txnStateStore->readRange(range & serverTagKeys).get(); // read is expected to be immediately available
for (auto& kv : serverKeysCleared) {
Tag tag = decodeServerTagValue(kv.value);
TraceEvent("ServerTagRemove")
.detail("PopVersion", popVersion)
.detail("Tag", tag.toString())
.detail("Server", decodeServerTagKey(kv.key));
logSystem->pop(popVersion, decodeServerTagValue(kv.value));
(*tag_popped)[tag] = popVersion;
if (toCommit) {
MutationRef privatized = m;
privatized.param1 = kv.key.withPrefix(systemKeys.begin, arena);
privatized.param2 = keyAfter(kv.key, arena).withPrefix(systemKeys.begin, arena);
toCommit->addTag(decodeServerTagValue(kv.value));
toCommit->writeTypedMessage(privatized);
}
}
// Might be a tss removal, which doesn't store a tag there.
// Chained if is a little verbose, but avoids unecessary work
if (toCommit && !initialCommit && !serverKeysCleared.size()) {
KeyRangeRef maybeTssRange = range & serverTagKeys;
if (maybeTssRange.singleKeyRange()) {
UID id = decodeServerTagKey(maybeTssRange.begin);
Optional<Value> ssiV = txnStateStore->readValue(serverListKeyFor(id)).get();
if (ssiV.present()) {
StorageServerInterface ssi = decodeServerListValue(ssiV.get());
if (ssi.isTss()) {
Optional<Value> tagV = txnStateStore->readValue(serverTagKeyFor(ssi.tssPairID.get())).get();
if (tagV.present()) {
MutationRef privatized = m;
privatized.param1 = maybeTssRange.begin.withPrefix(systemKeys.begin, arena);
privatized.param2 =
keyAfter(maybeTssRange.begin, arena).withPrefix(systemKeys.begin, arena);
toCommit->addTag(decodeServerTagValue(tagV.get()));
toCommit->writeTypedMessage(privatized);
}
}
}
}
}
}
if (!initialCommit) {
KeyRangeRef clearRange = range & serverTagKeys;
txnStateStore->clear(clearRange);
if (storageCache && clearRange.singleKeyRange()) {
storageCache->erase(decodeServerTagKey(clearRange.begin));
}
}
}
void checkClearServerTagHistoryKeys(KeyRangeRef range) {
if (!serverTagHistoryKeys.intersects(range)) {
return;
}
// Once a tag has been removed from history we should pop it, since we no longer have a record of the
// tag once it has been removed from history
if (logSystem && popVersion) {
auto serverKeysCleared = txnStateStore->readRange(range & serverTagHistoryKeys)
.get(); // read is expected to be immediately available
for (auto& kv : serverKeysCleared) {
Tag tag = decodeServerTagValue(kv.value);
TraceEvent("ServerTagHistoryRemove")
.detail("PopVersion", popVersion)
.detail("Tag", tag.toString())
.detail("Version", decodeServerTagHistoryKey(kv.key));
logSystem->pop(popVersion, tag);
(*tag_popped)[tag] = popVersion;
}
}
if (!initialCommit)
txnStateStore->clear(range & serverTagHistoryKeys);
}
void checkClearApplyMutationsEndRange(MutationRef m, KeyRangeRef range) {
if (!range.intersects(applyMutationsEndRange)) {
return;
}
KeyRangeRef commonEndRange(range & applyMutationsEndRange);
if (!initialCommit)
txnStateStore->clear(commonEndRange);
if (uid_applyMutationsData != nullptr) {
uid_applyMutationsData->erase(
uid_applyMutationsData->lower_bound(m.param1.substr(applyMutationsEndRange.begin.size())),
m.param2 == applyMutationsEndRange.end
? uid_applyMutationsData->end()
: uid_applyMutationsData->lower_bound(m.param2.substr(applyMutationsEndRange.begin.size())));
}
}
void checkClearApplyMutationKeyVersionMapRange(MutationRef m, KeyRangeRef range) {
if (!range.intersects(applyMutationsKeyVersionMapRange)) {
return;
}
KeyRangeRef commonApplyRange(range & applyMutationsKeyVersionMapRange);
if (!initialCommit)
txnStateStore->clear(commonApplyRange);
if (uid_applyMutationsData == nullptr) {
return;
}
if (m.param1.size() >= applyMutationsKeyVersionMapRange.begin.size() + sizeof(UID) &&
m.param2.size() >= applyMutationsKeyVersionMapRange.begin.size() + sizeof(UID)) {
Key uid = m.param1.substr(applyMutationsKeyVersionMapRange.begin.size(), sizeof(UID));
Key uid2 = m.param2.substr(applyMutationsKeyVersionMapRange.begin.size(), sizeof(UID));
if (uid == uid2) {
auto& p = (*uid_applyMutationsData)[uid];
if (p.keyVersion == Reference<KeyRangeMap<Version>>())
p.keyVersion = makeReference<KeyRangeMap<Version>>();
p.keyVersion->rawErase(
KeyRangeRef(m.param1.substr(applyMutationsKeyVersionMapRange.begin.size() + sizeof(UID)),
m.param2.substr(applyMutationsKeyVersionMapRange.begin.size() + sizeof(UID))));
}
}
}
void checkClearLogRangesRange(KeyRangeRef range) {
if (!range.intersects(logRangesRange)) {
return;
}
KeyRangeRef commonLogRange(range & logRangesRange);
TraceEvent("LogRangeClear")
.detail("RangeBegin", range.begin)
.detail("RangeEnd", range.end)
.detail("IntersectBegin", commonLogRange.begin)
.detail("IntersectEnd", commonLogRange.end);
// Remove the key range from the vector, if defined
if (vecBackupKeys) {
KeyRef logKeyBegin;
Key logKeyEnd, logDestination;
// Identify the backup keys being removed
// read is expected to be immediately available
auto logRangesAffected = txnStateStore->readRange(commonLogRange).get();
TraceEvent("LogRangeClearBegin").detail("AffectedLogRanges", logRangesAffected.size());
// Add the backup name to the backup locations that do not have it
for (auto logRangeAffected : logRangesAffected) {
// Parse the backup key and name
logKeyBegin = logRangesDecodeKey(logRangeAffected.key, nullptr);
// Decode the log destination and key value
logKeyEnd = logRangesDecodeValue(logRangeAffected.value, &logDestination);
TraceEvent("LogRangeErase")
.detail("AffectedKey", logRangeAffected.key)
.detail("AffectedValue", logRangeAffected.value)
.detail("LogKeyBegin", logKeyBegin)
.detail("LogKeyEnd", logKeyEnd)
.detail("LogDestination", logDestination);
// Identify the locations to place the backup key
auto logRanges = vecBackupKeys->modify(KeyRangeRef(logKeyBegin, logKeyEnd));
// Remove the log prefix from the ranges which include it
for (auto logRange : logRanges) {
auto& logRangeMap = logRange->value();
// Remove the backup name from the range
logRangeMap.erase(logDestination);
}
bool foundKey = false;
for (auto& it : vecBackupKeys->intersectingRanges(normalKeys)) {
if (it.value().count(logDestination) > 0) {
foundKey = true;
break;
}
}
if (!foundKey) {
auto logRanges = vecBackupKeys->modify(singleKeyRange(metadataVersionKey));
for (auto logRange : logRanges) {
auto& logRangeMap = logRange->value();
logRangeMap.erase(logDestination);
}
}
}
// Coallesce the entire range
vecBackupKeys->coalesce(allKeys);
}
if (!initialCommit)
txnStateStore->clear(commonLogRange);
}
void checkClearTssMappingKeys(MutationRef m, KeyRangeRef range) {
if (!tssMappingKeys.intersects(range)) {
return;
}
KeyRangeRef rangeToClear = range & tssMappingKeys;
ASSERT(rangeToClear.singleKeyRange());
// Normally uses key backed map, so have to use same unpacking code here.
UID ssId = Codec<UID>::unpack(Tuple::unpack(m.param1.removePrefix(tssMappingKeys.begin)));
if (!initialCommit) {
txnStateStore->clear(rangeToClear);
}
if (tssMapping) {
tssMapping->erase(ssId);
}
if (!toCommit) {
return;
}
// send private mutation to SS to notify that it no longer has a tss pair
if (Optional<Value> tagV = txnStateStore->readValue(serverTagKeyFor(ssId)).get(); tagV.present()) {
MutationRef privatized = m;
privatized.param1 = m.param1.withPrefix(systemKeys.begin, arena);
privatized.param2 = m.param2.withPrefix(systemKeys.begin, arena);
toCommit->addTag(decodeServerTagValue(tagV.get()));
toCommit->writeTypedMessage(privatized);
}
}
void checkClearTssQuarantineKeys(MutationRef m, KeyRangeRef range) {
if (!tssQuarantineKeys.intersects(range) || initialCommit) {
return;
}
KeyRangeRef rangeToClear = range & tssQuarantineKeys;
ASSERT(rangeToClear.singleKeyRange());
txnStateStore->clear(rangeToClear);
if (!toCommit) {
return;
}
UID tssId = decodeTssQuarantineKey(m.param1);
if (Optional<Value> ssiV = txnStateStore->readValue(serverListKeyFor(tssId)).get(); ssiV.present()) {
if (StorageServerInterface ssi = decodeServerListValue(ssiV.get()); ssi.isTss()) {
if (Optional<Value> tagV = txnStateStore->readValue(serverTagKeyFor(ssi.tssPairID.get())).get();
tagV.present()) {
MutationRef privatized = m;
privatized.param1 = m.param1.withPrefix(systemKeys.begin, arena);
privatized.param2 = m.param2.withPrefix(systemKeys.begin, arena);
toCommit->addTag(decodeServerTagValue(tagV.get()));
toCommit->writeTypedMessage(privatized);
}
}
}
}
void checkClearMiscRangeKeys(KeyRangeRef range) {
if (initialCommit) {
return;
}
if (range.contains(coordinatorsKey)) {
txnStateStore->clear(singleKeyRange(coordinatorsKey));
}
if (range.contains(databaseLockedKey)) {
txnStateStore->clear(singleKeyRange(databaseLockedKey));
}
if (range.contains(metadataVersionKey)) {
txnStateStore->clear(singleKeyRange(metadataVersionKey));
}
if (range.contains(mustContainSystemMutationsKey)) {
txnStateStore->clear(singleKeyRange(mustContainSystemMutationsKey));
}
if (range.contains(writeRecoveryKey)) {
txnStateStore->clear(singleKeyRange(writeRecoveryKey));
}
if (range.intersects(testOnlyTxnStateStorePrefixRange)) {
txnStateStore->clear(range & testOnlyTxnStateStorePrefixRange);
}
}
// If we accumulated private mutations for cached key-ranges, we also need to
// tag them with the relevant storage servers. This is done to make the storage
// servers aware of the cached key-ranges
// NOTE: we are assuming non-colliding cached key-ranges
// TODO Note that, we are currently not handling the case when cached key-ranges move out
// to different storage servers. This would require some checking when keys in the keyServersPrefix change.
// For the first implementation, we could just send the entire map to every storage server. Revisit!
void tagStorageServersForCachedKeyRanges() {
if (cachedRangeInfo.size() == 0 || !toCommit) {
return;
}
std::map<KeyRef, MutationRef>::iterator itr;
KeyRef keyBegin, keyEnd;
std::vector<uint16_t> serverIndices;
MutationRef mutationBegin, mutationEnd;
for (itr = cachedRangeInfo.begin(); itr != cachedRangeInfo.end(); ++itr) {
// first figure out the begin and end keys for the cached-range,
// the begin and end mutations can be in any order
decodeStorageCacheValue(itr->second.param2, serverIndices);
// serverIndices count should be greater than zero for beginKey mutations
if (serverIndices.size() > 0) {
keyBegin = itr->first;
mutationBegin = itr->second;
++itr;
if (itr != cachedRangeInfo.end()) {
keyEnd = itr->first;
mutationEnd = itr->second;
} else {
//TraceEvent(SevDebug, "EndKeyNotFound", dbgid).detail("KeyBegin", keyBegin.toString());
break;
}
} else {
keyEnd = itr->first;
mutationEnd = itr->second;
++itr;
if (itr != cachedRangeInfo.end()) {
keyBegin = itr->first;
mutationBegin = itr->second;
} else {
//TraceEvent(SevDebug, "BeginKeyNotFound", dbgid).detail("KeyEnd", keyEnd.toString());
break;
}
}
// Now get all the storage server tags for the cached key-ranges
std::set<Tag> allTags;
auto ranges = keyInfo->intersectingRanges(KeyRangeRef(keyBegin, keyEnd));
for (auto it : ranges) {
auto& r = it.value();
for (auto info : r.src_info) {
allTags.insert(info->tag);
}
for (auto info : r.dest_info) {
allTags.insert(info->tag);
}
}
// Add the tags to both begin and end mutations
toCommit->addTags(allTags);
toCommit->writeTypedMessage(mutationBegin);
toCommit->addTags(allTags);
toCommit->writeTypedMessage(mutationEnd);
}
}
public:
void apply() {
for (auto const& m : mutations) {
if (toCommit) {
toCommit->addTransactionInfo(spanContext);
}
if (m.type == MutationRef::SetValue && isSystemKey(m.param1)) {
checkSetKeyServersPrefix(m);
checkSetServerKeysPrefix(m);
checkSetServerTagsPrefix(m);
checkSetStorageCachePrefix(m);
checkSetCacheKeysPrefix(m);
checkSetConfigKeys(m);
checkSetServerListPrefix(m);
checkSetChangeFeedPrefix(m);
checkSetTSSMappingKeys(m);
checkSetTSSQuarantineKeys(m);
checkSetApplyMutationsEndRange(m);
checkSetApplyMutationsKeyVersionMapRange(m);
checkSetLogRangesRange(m);
checkSetGlobalKeys(m);
checkSetWriteRecoverKey(m);
checkSetMinRequiredCommitVersionKey(m);
checkSetOtherKeys(m);
} else if (m.type == MutationRef::ClearRange && isSystemKey(m.param2)) {
KeyRangeRef range(m.param1, m.param2);
checkClearKeyServerKeys(range);
checkClearConfigKeys(m, range);
checkClearServerListKeys(range);
checkClearTagLocalityListKeys(range);
checkClearServerTagKeys(m, range);
checkClearServerTagHistoryKeys(range);
checkClearApplyMutationsEndRange(m, range);
checkClearApplyMutationKeyVersionMapRange(m, range);
checkClearLogRangesRange(range);
checkClearTssMappingKeys(m, range);
checkClearTssQuarantineKeys(m, range);
checkClearMiscRangeKeys(range);
}
}
for (KeyRangeRef& range : tssServerListToRemove) {
txnStateStore->clear(range);
}
for (auto& tssPair : tssMappingToAdd) {
// read tss server list from txn state store and add it to tss mapping
StorageServerInterface tssi =
decodeServerListValue(txnStateStore->readValue(serverListKeyFor(tssPair.second)).get().get());
(*tssMapping)[tssPair.first] = tssi;
}
tagStorageServersForCachedKeyRanges();
}
};
} // anonymous namespace
void applyMetadataMutations(SpanID const& spanContext,
ProxyCommitData& proxyCommitData,
Arena& arena,
Reference<ILogSystem> logSystem,
const VectorRef<MutationRef>& mutations,
LogPushData* toCommit,
bool& confChange,
Version popVersion,
bool initialCommit) {
ApplyMetadataMutationsImpl(
spanContext, arena, mutations, proxyCommitData, logSystem, toCommit, confChange, popVersion, initialCommit)
.apply();
}
void applyMetadataMutations(SpanID const& spanContext,
const UID& dbgid,
Arena& arena,
const VectorRef<MutationRef>& mutations,
IKeyValueStore* txnStateStore) {
ApplyMetadataMutationsImpl(spanContext, dbgid, arena, mutations, txnStateStore).apply();
}
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