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/**
* Copyright (C) 2018-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the Server Side Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#include "mongo/platform/basic.h"
#include "mongo/db/repl/oplog_applier.h"
#include "mongo/db/auth/authorization_session.h"
#include "mongo/db/namespace_string.h"
#include "mongo/db/repl/repl_server_parameters_gen.h"
#include "mongo/logv2/log.h"
#include "mongo/util/processinfo.h"
#include "mongo/util/time_support.h"
#define MONGO_LOGV2_DEFAULT_COMPONENT ::mongo::logv2::LogComponent::kReplication
namespace mongo {
namespace repl {
NoopOplogApplierObserver noopOplogApplierObserver;
using CallbackArgs = executor::TaskExecutor::CallbackArgs;
OplogApplier::OplogApplier(executor::TaskExecutor* executor,
OplogBuffer* oplogBuffer,
Observer* observer,
const Options& options)
: _executor(executor), _oplogBuffer(oplogBuffer), _observer(observer), _options(options) {
_oplogBatcher = std::make_unique<OplogBatcher>(this, oplogBuffer);
}
OplogBuffer* OplogApplier::getBuffer() const {
return _oplogBuffer;
}
Future<void> OplogApplier::startup() {
auto pf = makePromiseFuture<void>();
auto callback = [this,
promise = std::move(pf.promise)](const CallbackArgs& args) mutable noexcept {
invariant(args.status);
LOGV2(21224, "Starting oplog application");
_run(_oplogBuffer);
LOGV2(21225, "Finished oplog application");
promise.setWith([] {});
};
invariant(_executor->scheduleWork(std::move(callback)).getStatus());
return std::move(pf.future);
}
void OplogApplier::shutdown() {
// Shutdown will hang if this failpoint is enabled.
if (globalFailPointRegistry().find("rsSyncApplyStop")->shouldFail()) {
LOGV2_FATAL_NOTRACE(40304, "Turn off rsSyncApplyStop before attempting clean shutdown");
}
stdx::lock_guard<Latch> lock(_mutex);
_inShutdown = true;
}
bool OplogApplier::inShutdown() const {
stdx::lock_guard<Latch> lock(_mutex);
return _inShutdown;
}
void OplogApplier::waitForSpace(OperationContext* opCtx, std::size_t size) {
_oplogBuffer->waitForSpace(opCtx, size);
}
/**
* Pushes operations read from sync source into oplog buffer.
*/
void OplogApplier::enqueue(OperationContext* opCtx,
std::vector<OplogEntry>::const_iterator begin,
std::vector<OplogEntry>::const_iterator end) {
OplogBuffer::Batch batch;
for (auto i = begin; i != end; ++i) {
batch.push_back(i->getEntry().getRaw());
}
enqueue(opCtx, batch.cbegin(), batch.cend());
}
void OplogApplier::enqueue(OperationContext* opCtx,
OplogBuffer::Batch::const_iterator begin,
OplogBuffer::Batch::const_iterator end) {
static Occasionally sampler;
if (sampler.tick()) {
LOGV2_DEBUG(21226,
2,
"oplog buffer has {oplogBufferSizeBytes} bytes",
"Oplog buffer size",
"oplogBufferSizeBytes"_attr = _oplogBuffer->getSize());
}
_oplogBuffer->push(opCtx, begin, end);
}
StatusWith<OpTime> OplogApplier::applyOplogBatch(OperationContext* opCtx,
std::vector<OplogEntry> ops) {
_observer->onBatchBegin(ops);
auto lastApplied = _applyOplogBatch(opCtx, std::move(ops));
_observer->onBatchEnd(lastApplied, {});
return lastApplied;
}
StatusWith<std::vector<OplogEntry>> OplogApplier::getNextApplierBatch(
OperationContext* opCtx, const BatchLimits& batchLimits, Milliseconds waitToFillBatch) {
return _oplogBatcher->getNextApplierBatch(opCtx, batchLimits, waitToFillBatch);
}
const OplogApplier::Options& OplogApplier::getOptions() const {
return _options;
}
std::unique_ptr<ThreadPool> makeReplWriterPool() {
// Reduce content pinned in cache by single oplog batch on small machines by reducing the number
// of threads of ReplWriter to reduce the number of concurrent open WT transactions.
if (replWriterThreadCount < replWriterMinThreadCount) {
LOGV2_FATAL_NOTRACE(
5605400,
"replWriterMinThreadCount must be less than or equal to replWriterThreadCount",
"replWriterMinThreadCount"_attr = replWriterMinThreadCount,
"replWriterThreadCount"_attr = replWriterThreadCount);
}
auto numberOfThreads =
std::min(replWriterThreadCount, 2 * static_cast<int>(ProcessInfo::getNumAvailableCores()));
return makeReplWriterPool(numberOfThreads);
}
std::unique_ptr<ThreadPool> makeReplWriterPool(int threadCount) {
return makeReplWriterPool(threadCount, "ReplWriterWorker"_sd);
}
std::unique_ptr<ThreadPool> makeReplWriterPool(int threadCount,
StringData name,
bool isKillableByStepdown) {
ThreadPool::Options options;
options.threadNamePrefix = name + "-";
options.poolName = name + "ThreadPool";
options.minThreads =
replWriterMinThreadCount < threadCount ? replWriterMinThreadCount : threadCount;
options.maxThreads = static_cast<size_t>(threadCount);
options.onCreateThread = [isKillableByStepdown](const std::string&) {
Client::initThread(getThreadName());
auto client = Client::getCurrent();
AuthorizationSession::get(*client)->grantInternalAuthorization(client);
if (!isKillableByStepdown) {
stdx::lock_guard<Client> lk(*client);
client->setSystemOperationUnKillableByStepdown(lk);
}
};
auto pool = std::make_unique<ThreadPool>(options);
pool->startup();
return pool;
}
} // namespace repl
} // namespace mongo
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