blob: aa62d793bc79b7c91ef3ec08468ba4a9e1461a33 [file] [log] [blame]
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
// This source code is licensed under both the GPLv2 (found in the
// COPYING file in the root directory) and Apache 2.0 License
// (found in the LICENSE.Apache file in the root directory).
// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file. See the AUTHORS file for names of contributors.
#pragma once
#include <atomic>
#include <deque>
#include <limits>
#include <set>
#include <utility>
#include <vector>
#include <string>
#include <memory>
#include "db/version_set.h"
#include "options/db_options.h"
#include "port/port.h"
#include "rocksdb/env.h"
#include "rocksdb/status.h"
#include "rocksdb/transaction_log.h"
#include "rocksdb/types.h"
namespace rocksdb {
class WalManager {
WalManager(const ImmutableDBOptions& db_options,
const EnvOptions& env_options)
: db_options_(db_options),
purge_wal_files_last_run_(0) {}
Status GetSortedWalFiles(VectorLogPtr& files);
Status GetUpdatesSince(
SequenceNumber seq_number, std::unique_ptr<TransactionLogIterator>* iter,
const TransactionLogIterator::ReadOptions& read_options,
VersionSet* version_set);
void PurgeObsoleteWALFiles();
void ArchiveWALFile(const std::string& fname, uint64_t number);
Status TEST_ReadFirstRecord(const WalFileType type, const uint64_t number,
SequenceNumber* sequence) {
return ReadFirstRecord(type, number, sequence);
Status TEST_ReadFirstLine(const std::string& fname, const uint64_t number,
SequenceNumber* sequence) {
return ReadFirstLine(fname, number, sequence);
Status GetSortedWalsOfType(const std::string& path, VectorLogPtr& log_files,
WalFileType type);
// Requires: all_logs should be sorted with earliest log file first
// Retains all log files in all_logs which contain updates with seq no.
// Greater Than or Equal to the requested SequenceNumber.
Status RetainProbableWalFiles(VectorLogPtr& all_logs,
const SequenceNumber target);
Status ReadFirstRecord(const WalFileType type, const uint64_t number,
SequenceNumber* sequence);
Status ReadFirstLine(const std::string& fname, const uint64_t number,
SequenceNumber* sequence);
// ------- state from DBImpl ------
const ImmutableDBOptions& db_options_;
const EnvOptions& env_options_;
Env* env_;
// ------- WalManager state -------
// cache for ReadFirstRecord() calls
std::unordered_map<uint64_t, SequenceNumber> read_first_record_cache_;
port::Mutex read_first_record_cache_mutex_;
// last time when PurgeObsoleteWALFiles ran.
uint64_t purge_wal_files_last_run_;
// obsolete files will be deleted every this seconds if ttl deletion is
// enabled and archive size_limit is disabled.
static const uint64_t kDefaultIntervalToDeleteObsoleteWAL = 600;
#endif // ROCKSDB_LITE
} // namespace rocksdb