230 lines
8.3 KiB
C++
230 lines
8.3 KiB
C++
/*
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* DifferentClustersSameRV.actor.cpp
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*
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* This source file is part of the FoundationDB open source project
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*
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* Copyright 2013-2022 Apple Inc. and the FoundationDB project authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "fdbclient/ClusterConnectionMemoryRecord.h"
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#include "fdbclient/ManagementAPI.actor.h"
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#include "fdbclient/RunTransaction.actor.h"
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#include "fdbrpc/simulator.h"
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#include "fdbserver/workloads/workloads.actor.h"
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#include "flow/ApiVersion.h"
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#include "flow/genericactors.actor.h"
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#include "flow/actorcompiler.h" // This must be the last #include.
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// A workload attempts to read from two different clusters with the same read version.
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struct DifferentClustersSameRVWorkload : TestWorkload {
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Database originalDB;
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Database extraDB;
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double testDuration;
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double switchAfter;
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Value keyToRead;
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Value keyToWatch;
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bool switchComplete = false;
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DifferentClustersSameRVWorkload(WorkloadContext const& wcx) : TestWorkload(wcx) {
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ASSERT(g_simulator->extraDatabases.size() == 1);
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auto extraFile =
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makeReference<ClusterConnectionMemoryRecord>(ClusterConnectionString(g_simulator->extraDatabases[0]));
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extraDB = Database::createDatabase(extraFile, ApiVersion::LATEST_VERSION);
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testDuration = getOption(options, "testDuration"_sr, 100.0);
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switchAfter = getOption(options, "switchAfter"_sr, 50.0);
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keyToRead = getOption(options, "keyToRead"_sr, "someKey"_sr);
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keyToWatch = getOption(options, "keyToWatch"_sr, "anotherKey"_sr);
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}
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std::string description() const override { return "DifferentClustersSameRV"; }
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Future<Void> setup(Database const& cx) override { return Void(); }
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Future<Void> start(Database const& cx) override {
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if (clientId != 0) {
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return Void();
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}
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auto switchConnFileDb = Database::createDatabase(cx->getConnectionRecord(), -1);
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originalDB = cx;
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std::vector<Future<Void>> clients = { readerClientSeparateDBs(cx, this),
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doSwitch(switchConnFileDb, this),
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writerClient(cx, this),
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writerClient(extraDB, this) };
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return success(timeout(waitForAll(clients), testDuration));
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}
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Future<bool> check(Database const& cx) override {
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if (clientId == 0 && !switchComplete) {
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TraceEvent(SevError, "DifferentClustersSwitchNotComplete").log();
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return false;
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}
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return true;
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}
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void getMetrics(std::vector<PerfMetric>& m) override {}
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ACTOR static Future<std::pair<Version, Optional<Value>>> doRead(Database cx,
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DifferentClustersSameRVWorkload* self) {
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state Transaction tr(cx);
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loop {
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tr.setOption(FDBTransactionOptions::READ_LOCK_AWARE);
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try {
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state Version rv = wait(tr.getReadVersion());
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Optional<Value> val1 = wait(tr.get(self->keyToRead));
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return std::make_pair(rv, val1);
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} catch (Error& e) {
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wait(tr.onError(e));
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}
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}
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}
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ACTOR static Future<Void> doWrite(Database cx, Value key, Optional<Value> val) {
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state Transaction tr(cx);
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loop {
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tr.setOption(FDBTransactionOptions::LOCK_AWARE);
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try {
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if (val.present()) {
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tr.set(key, val.get());
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} else {
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tr.clear(key);
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}
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wait(tr.commit());
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return Void();
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} catch (Error& e) {
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wait(tr.onError(e));
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}
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}
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}
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ACTOR static Future<Void> advanceVersion(Database cx, Version v) {
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state Transaction tr(cx);
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loop {
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tr.setOption(FDBTransactionOptions::ACCESS_SYSTEM_KEYS);
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tr.setOption(FDBTransactionOptions::LOCK_AWARE);
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try {
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Version extraDBVersion = wait(tr.getReadVersion());
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if (extraDBVersion <= v) {
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tr.set(minRequiredCommitVersionKey, BinaryWriter::toValue(v + 1, Unversioned()));
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wait(tr.commit());
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} else {
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return Void();
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}
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} catch (Error& e) {
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wait(tr.onError(e));
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}
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}
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}
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ACTOR static Future<Void> doSwitch(Database cx, DifferentClustersSameRVWorkload* self) {
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state UID lockUid = deterministicRandom()->randomUniqueID();
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wait(delay(self->switchAfter));
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state Future<Void> watchFuture;
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wait(runRYWTransaction(cx, [=](Reference<ReadYourWritesTransaction> tr) mutable -> Future<Void> {
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watchFuture = tr->watch(self->keyToWatch);
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return Void();
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}));
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wait(lockDatabase(self->originalDB, lockUid) && lockDatabase(self->extraDB, lockUid));
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TraceEvent("DifferentClusters_LockedDatabases").log();
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std::pair<Version, Optional<Value>> read1 = wait(doRead(self->originalDB, self));
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state Version rv = read1.first;
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state Optional<Value> val1 = read1.second;
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wait(doWrite(self->extraDB, self->keyToRead, val1));
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TraceEvent("DifferentClusters_CopiedDatabase").log();
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wait(advanceVersion(self->extraDB, rv));
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TraceEvent("DifferentClusters_AdvancedVersion").log();
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wait(cx->switchConnectionRecord(
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makeReference<ClusterConnectionMemoryRecord>(self->extraDB->getConnectionRecord()->getConnectionString())));
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TraceEvent("DifferentClusters_SwitchedConnectionFile").log();
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state Transaction tr(cx);
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tr.setVersion(rv);
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tr.setOption(FDBTransactionOptions::READ_LOCK_AWARE);
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try {
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Optional<Value> val2 = wait(tr.get(self->keyToRead));
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// We read the same key at the same read version with the same db, we must get the same value (or fail to
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// read)
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ASSERT(val1 == val2);
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} catch (Error& e) {
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TraceEvent("DifferentClusters_ReadError").error(e);
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wait(tr.onError(e));
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}
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// In an actual switch we would call switchConnectionRecord after unlocking the database. But it's possible
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// that a storage server serves a read at |rv| even after the recovery caused by unlocking the database, and we
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// want to make that more likely for this test. So read at |rv| then unlock.
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wait(unlockDatabase(self->extraDB, lockUid));
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TraceEvent("DifferentClusters_UnlockedExtraDB").log();
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ASSERT(!watchFuture.isReady() || watchFuture.isError());
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wait(doWrite(self->extraDB, self->keyToWatch, Optional<Value>{ ""_sr }));
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TraceEvent("DifferentClusters_WaitingForWatch").log();
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try {
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wait(timeoutError(watchFuture, (self->testDuration - self->switchAfter) / 2));
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} catch (Error& e) {
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TraceEvent("DifferentClusters_WatchError").error(e);
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wait(tr.onError(e));
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}
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TraceEvent("DifferentClusters_Done").log();
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self->switchComplete = true;
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wait(unlockDatabase(self->originalDB, lockUid)); // So quietDatabase can finish
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return Void();
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}
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ACTOR static Future<Void> writerClient(Database cx, DifferentClustersSameRVWorkload* self) {
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state Transaction tr(cx);
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loop {
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try {
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Optional<Value> value = wait(tr.get(self->keyToRead));
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int x = 0;
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if (value.present()) {
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BinaryReader r(value.get(), Unversioned());
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serializer(r, x);
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}
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x += 1;
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BinaryWriter w(Unversioned());
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serializer(w, x);
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tr.set(self->keyToRead, w.toValue());
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wait(tr.commit());
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tr.reset();
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} catch (Error& e) {
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wait(tr.onError(e));
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}
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}
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}
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ACTOR static Future<Void> readerClientSeparateDBs(Database cx, DifferentClustersSameRVWorkload* self) {
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loop {
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state Transaction tr1(cx);
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state Transaction tr2(self->extraDB);
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tr1.setOption(FDBTransactionOptions::READ_LOCK_AWARE);
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tr2.setOption(FDBTransactionOptions::READ_LOCK_AWARE);
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try {
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wait(success(tr1.getReadVersion()) && success(tr2.getReadVersion()));
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state Version rv = std::min(tr1.getReadVersion().get(), tr2.getReadVersion().get());
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tr1.reset();
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tr2.reset();
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tr1.setVersion(rv);
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tr2.setVersion(rv);
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state Future<Optional<Value>> val1 = tr1.get(self->keyToRead);
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state Future<Optional<Value>> val2 = tr2.get(self->keyToRead);
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wait(success(val1) && success(val2));
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// We're reading from different db's with the same read version. We can get a different value.
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CODE_PROBE(val1.get() != val2.get(), "reading from different dbs with the same version");
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} catch (Error& e) {
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wait(tr1.onError(e) && tr2.onError(e));
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}
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}
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}
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};
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WorkloadFactory<DifferentClustersSameRVWorkload> DifferentClustersSameRVWorkloadFactory("DifferentClustersSameRV");
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