6de6a06631
Summary: Introducing new compaction style -- FIFO. FIFO compaction style has write amplification of 1 (+1 for WAL) and it deletes the oldest files when the total DB size exceeds pre-configured values. FIFO compaction style is suited for storing high-frequency event logs. Test Plan: Added a unit test Reviewers: dhruba, haobo, sdong Reviewed By: dhruba Subscribers: alberts, leveldb Differential Revision: https://reviews.facebook.net/D18765
134 lines
4.1 KiB
C++
134 lines
4.1 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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//
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// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file. See the AUTHORS file for names of contributors.
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#ifndef ROCKSDB_LITE
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#include "db/db_impl.h"
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namespace rocksdb {
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void DBImpl::TEST_PurgeObsoleteteWAL() { PurgeObsoleteWALFiles(); }
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uint64_t DBImpl::TEST_GetLevel0TotalSize() {
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MutexLock l(&mutex_);
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return default_cf_handle_->cfd()->current()->NumLevelBytes(0);
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}
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Iterator* DBImpl::TEST_NewInternalIterator(ColumnFamilyHandle* column_family) {
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ColumnFamilyData* cfd;
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if (column_family == nullptr) {
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cfd = default_cf_handle_->cfd();
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} else {
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auto cfh = reinterpret_cast<ColumnFamilyHandleImpl*>(column_family);
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cfd = cfh->cfd();
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}
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mutex_.Lock();
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SuperVersion* super_version = cfd->GetSuperVersion()->Ref();
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mutex_.Unlock();
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ReadOptions roptions;
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return NewInternalIterator(roptions, cfd, super_version);
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}
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int64_t DBImpl::TEST_MaxNextLevelOverlappingBytes(
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ColumnFamilyHandle* column_family) {
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ColumnFamilyData* cfd;
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if (column_family == nullptr) {
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cfd = default_cf_handle_->cfd();
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} else {
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auto cfh = reinterpret_cast<ColumnFamilyHandleImpl*>(column_family);
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cfd = cfh->cfd();
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}
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MutexLock l(&mutex_);
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return cfd->current()->MaxNextLevelOverlappingBytes();
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}
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void DBImpl::TEST_GetFilesMetaData(
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ColumnFamilyHandle* column_family,
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std::vector<std::vector<FileMetaData>>* metadata) {
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auto cfh = reinterpret_cast<ColumnFamilyHandleImpl*>(column_family);
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auto cfd = cfh->cfd();
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MutexLock l(&mutex_);
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metadata->resize(NumberLevels());
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for (int level = 0; level < NumberLevels(); level++) {
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const std::vector<FileMetaData*>& files = cfd->current()->files_[level];
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(*metadata)[level].clear();
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for (const auto& f : files) {
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(*metadata)[level].push_back(*f);
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}
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}
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}
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uint64_t DBImpl::TEST_Current_Manifest_FileNo() {
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return versions_->ManifestFileNumber();
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}
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Status DBImpl::TEST_CompactRange(int level, const Slice* begin,
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const Slice* end,
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ColumnFamilyHandle* column_family) {
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ColumnFamilyData* cfd;
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if (column_family == nullptr) {
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cfd = default_cf_handle_->cfd();
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} else {
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auto cfh = reinterpret_cast<ColumnFamilyHandleImpl*>(column_family);
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cfd = cfh->cfd();
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}
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int output_level =
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(cfd->options()->compaction_style == kCompactionStyleUniversal ||
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cfd->options()->compaction_style == kCompactionStyleFIFO)
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? level
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: level + 1;
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return RunManualCompaction(cfd, level, output_level, begin, end);
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}
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Status DBImpl::TEST_FlushMemTable(bool wait) {
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FlushOptions fo;
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fo.wait = wait;
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return FlushMemTable(default_cf_handle_->cfd(), fo);
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}
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Status DBImpl::TEST_WaitForFlushMemTable(ColumnFamilyHandle* column_family) {
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ColumnFamilyData* cfd;
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if (column_family == nullptr) {
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cfd = default_cf_handle_->cfd();
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} else {
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auto cfh = reinterpret_cast<ColumnFamilyHandleImpl*>(column_family);
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cfd = cfh->cfd();
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}
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return WaitForFlushMemTable(cfd);
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}
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Status DBImpl::TEST_WaitForCompact() {
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// Wait until the compaction completes
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// TODO: a bug here. This function actually does not necessarily
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// wait for compact. It actually waits for scheduled compaction
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// OR flush to finish.
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MutexLock l(&mutex_);
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while ((bg_compaction_scheduled_ || bg_flush_scheduled_) && bg_error_.ok()) {
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bg_cv_.Wait();
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}
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return bg_error_;
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}
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Status DBImpl::TEST_ReadFirstRecord(const WalFileType type,
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const uint64_t number,
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SequenceNumber* sequence) {
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return ReadFirstRecord(type, number, sequence);
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}
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Status DBImpl::TEST_ReadFirstLine(const std::string& fname,
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SequenceNumber* sequence) {
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return ReadFirstLine(fname, sequence);
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}
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} // namespace rocksdb
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#endif // ROCKSDB_LITE
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