rocksdb/util/log_write_bench.cc
Siying Dong d616ebea23 Add GPLv2 as an alternative license.
Summary: Closes https://github.com/facebook/rocksdb/pull/2226

Differential Revision: D4967547

Pulled By: siying

fbshipit-source-id: dd3b58ae1e7a106ab6bb6f37ab5c88575b125ab4
2017-04-27 18:06:12 -07:00

87 lines
2.6 KiB
C++

// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
// This source code is licensed under the BSD-style license found in the
// LICENSE file in the root directory of this source tree. An additional grant
// of patent rights can be found in the PATENTS file in the same directory.
// This source code is also licensed under the GPLv2 license found in the
// COPYING file in the root directory of this source tree.
#ifndef GFLAGS
#include <cstdio>
int main() {
fprintf(stderr, "Please install gflags to run rocksdb tools\n");
return 1;
}
#else
#include <gflags/gflags.h>
#include "monitoring/histogram.h"
#include "rocksdb/env.h"
#include "util/file_reader_writer.h"
#include "util/testharness.h"
#include "util/testutil.h"
using GFLAGS::ParseCommandLineFlags;
using GFLAGS::SetUsageMessage;
// A simple benchmark to simulate transactional logs
DEFINE_int32(num_records, 6000, "Number of records.");
DEFINE_int32(record_size, 249, "Size of each record.");
DEFINE_int32(record_interval, 10000, "Interval between records (microSec)");
DEFINE_int32(bytes_per_sync, 0, "bytes_per_sync parameter in EnvOptions");
DEFINE_bool(enable_sync, false, "sync after each write.");
namespace rocksdb {
void RunBenchmark() {
std::string file_name = test::TmpDir() + "/log_write_benchmark.log";
Env* env = Env::Default();
EnvOptions env_options = env->OptimizeForLogWrite(EnvOptions());
env_options.bytes_per_sync = FLAGS_bytes_per_sync;
unique_ptr<WritableFile> file;
env->NewWritableFile(file_name, &file, env_options);
unique_ptr<WritableFileWriter> writer;
writer.reset(new WritableFileWriter(std::move(file), env_options));
std::string record;
record.assign(FLAGS_record_size, 'X');
HistogramImpl hist;
uint64_t start_time = env->NowMicros();
for (int i = 0; i < FLAGS_num_records; i++) {
uint64_t start_nanos = env->NowNanos();
writer->Append(record);
writer->Flush();
if (FLAGS_enable_sync) {
writer->Sync(false);
}
hist.Add(env->NowNanos() - start_nanos);
if (i % 1000 == 1) {
fprintf(stderr, "Wrote %d records...\n", i);
}
int time_to_sleep =
(i + 1) * FLAGS_record_interval - (env->NowMicros() - start_time);
if (time_to_sleep > 0) {
env->SleepForMicroseconds(time_to_sleep);
}
}
fprintf(stderr, "Distribution of latency of append+flush: \n%s",
hist.ToString().c_str());
}
} // namespace rocksdb
int main(int argc, char** argv) {
SetUsageMessage(std::string("\nUSAGE:\n") + std::string(argv[0]) +
" [OPTIONS]...");
ParseCommandLineFlags(&argc, &argv, true);
rocksdb::RunBenchmark();
return 0;
}
#endif // GFLAGS