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https://github.com/facebook/rocksdb.git
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3d9e6f7759
Summary: When memtable is full it calls the registered callback. That callback then registers column family as needing the flush. Every write checks if there are some column families that need to be flushed. This completely eliminates the need for MakeRoomForWrite() function and simplifies our Write code-path. There is some complexity with the concurrency when the column family is dropped. I made it a bit less complex by dropping the column family from the write thread in https://reviews.facebook.net/D22965. Let me know if you want to discuss this. Test Plan: make check works. I'll also run db_stress with creating and dropping column families for a while. Reviewers: yhchiang, sdong, ljin Reviewed By: ljin Subscribers: leveldb Differential Revision: https://reviews.facebook.net/D23067
88 lines
2.8 KiB
C++
88 lines
2.8 KiB
C++
// Copyright (c) 2013, Facebook, Inc. All rights reserved.
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// This source code is licensed under the BSD-style license found in the
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// LICENSE file in the root directory of this source tree. An additional grant
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// of patent rights can be found in the PATENTS file in the same directory.
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#include <vector>
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#include "util/testharness.h"
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#include "util/benchharness.h"
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#include "db/version_set.h"
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#include "db/write_controller.h"
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#include "util/mutexlock.h"
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namespace rocksdb {
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std::string MakeKey(unsigned int num) {
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char buf[30];
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snprintf(buf, sizeof(buf), "%016u", num);
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return std::string(buf);
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}
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void BM_LogAndApply(int iters, int num_base_files) {
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VersionSet* vset;
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WriteController wc;
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ColumnFamilyData* default_cfd;
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uint64_t fnum = 1;
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port::Mutex mu;
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MutexLock l(&mu);
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BENCHMARK_SUSPEND {
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std::string dbname = test::TmpDir() + "/rocksdb_test_benchmark";
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ASSERT_OK(DestroyDB(dbname, Options()));
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DB* db = nullptr;
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Options opts;
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opts.create_if_missing = true;
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Status s = DB::Open(opts, dbname, &db);
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ASSERT_OK(s);
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ASSERT_TRUE(db != nullptr);
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delete db;
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db = nullptr;
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Options options;
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EnvOptions sopt;
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// Notice we are using the default options not through SanitizeOptions().
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// We might want to initialize some options manually if needed.
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options.db_paths.emplace_back(dbname, 0);
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// The parameter of table cache is passed in as null, so any file I/O
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// operation is likely to fail.
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vset = new VersionSet(dbname, &options, sopt, nullptr, &wc);
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std::vector<ColumnFamilyDescriptor> dummy;
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dummy.push_back(ColumnFamilyDescriptor());
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ASSERT_OK(vset->Recover(dummy));
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default_cfd = vset->GetColumnFamilySet()->GetDefault();
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VersionEdit vbase;
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for (int i = 0; i < num_base_files; i++) {
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InternalKey start(MakeKey(2 * fnum), 1, kTypeValue);
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InternalKey limit(MakeKey(2 * fnum + 1), 1, kTypeDeletion);
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vbase.AddFile(2, ++fnum, 0, 1 /* file size */, start, limit, 1, 1);
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}
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ASSERT_OK(vset->LogAndApply(default_cfd, &vbase, &mu));
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}
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for (int i = 0; i < iters; i++) {
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VersionEdit vedit;
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vedit.DeleteFile(2, fnum);
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InternalKey start(MakeKey(2 * fnum), 1, kTypeValue);
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InternalKey limit(MakeKey(2 * fnum + 1), 1, kTypeDeletion);
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vedit.AddFile(2, ++fnum, 0, 1 /* file size */, start, limit, 1, 1);
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vset->LogAndApply(default_cfd, &vedit, &mu);
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}
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delete vset;
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}
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BENCHMARK_NAMED_PARAM(BM_LogAndApply, 1000_iters_1_file, 1000, 1)
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BENCHMARK_NAMED_PARAM(BM_LogAndApply, 1000_iters_100_files, 1000, 100)
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BENCHMARK_NAMED_PARAM(BM_LogAndApply, 1000_iters_10000_files, 1000, 10000)
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BENCHMARK_NAMED_PARAM(BM_LogAndApply, 100_iters_100000_files, 100, 100000)
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} // namespace rocksdb
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int main(int argc, char** argv) {
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rocksdb::benchmark::RunBenchmarks();
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return 0;
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}
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