mirror of
https://github.com/facebook/rocksdb.git
synced 2024-12-04 20:02:50 +00:00
fdf882ded2
Summary: When dynamically linking two binaries together, different builds of RocksDB from two sources might cause errors. To provide a tool for user to solve the problem, the RocksDB namespace is changed to a flag which can be overridden in build time. Pull Request resolved: https://github.com/facebook/rocksdb/pull/6433 Test Plan: Build release, all and jtest. Try to build with ROCKSDB_NAMESPACE with another flag. Differential Revision: D19977691 fbshipit-source-id: aa7f2d0972e1c31d75339ac48478f34f6cfcfb3e
84 lines
2.9 KiB
C++
84 lines
2.9 KiB
C++
// 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 "db/db_impl/db_impl.h"
|
|
#include "rocksdb/stats_history.h"
|
|
|
|
namespace ROCKSDB_NAMESPACE {
|
|
|
|
extern const std::string kFormatVersionKeyString;
|
|
extern const std::string kCompatibleVersionKeyString;
|
|
extern const uint64_t kStatsCFCurrentFormatVersion;
|
|
extern const uint64_t kStatsCFCompatibleFormatVersion;
|
|
|
|
enum StatsVersionKeyType : uint32_t {
|
|
kFormatVersion = 1,
|
|
kCompatibleVersion = 2,
|
|
kKeyTypeMax = 3
|
|
};
|
|
|
|
// Read the version number from persitent stats cf depending on type provided
|
|
// stores the version number in `*version_number`
|
|
// returns Status::OK() on success, or other status code on failure
|
|
Status DecodePersistentStatsVersionNumber(DBImpl* db, StatsVersionKeyType type,
|
|
uint64_t* version_number);
|
|
|
|
// Encode timestamp and stats key into buf
|
|
// Format: timestamp(10 digit) + '#' + key
|
|
// Total length of encoded key will be capped at 100 bytes
|
|
int EncodePersistentStatsKey(uint64_t timestamp, const std::string& key,
|
|
int size, char* buf);
|
|
|
|
void OptimizeForPersistentStats(ColumnFamilyOptions* cfo);
|
|
|
|
class PersistentStatsHistoryIterator final : public StatsHistoryIterator {
|
|
public:
|
|
PersistentStatsHistoryIterator(uint64_t start_time, uint64_t end_time,
|
|
DBImpl* db_impl)
|
|
: time_(0),
|
|
start_time_(start_time),
|
|
end_time_(end_time),
|
|
valid_(true),
|
|
db_impl_(db_impl) {
|
|
AdvanceIteratorByTime(start_time_, end_time_);
|
|
}
|
|
~PersistentStatsHistoryIterator() override;
|
|
bool Valid() const override;
|
|
Status status() const override;
|
|
|
|
void Next() override;
|
|
uint64_t GetStatsTime() const override;
|
|
|
|
const std::map<std::string, uint64_t>& GetStatsMap() const override;
|
|
|
|
private:
|
|
// advance the iterator to the next stats history record with timestamp
|
|
// between [start_time, end_time)
|
|
void AdvanceIteratorByTime(uint64_t start_time, uint64_t end_time);
|
|
|
|
// No copying allowed
|
|
PersistentStatsHistoryIterator(const PersistentStatsHistoryIterator&) =
|
|
delete;
|
|
void operator=(const PersistentStatsHistoryIterator&) = delete;
|
|
PersistentStatsHistoryIterator(PersistentStatsHistoryIterator&&) = delete;
|
|
PersistentStatsHistoryIterator& operator=(PersistentStatsHistoryIterator&&) =
|
|
delete;
|
|
|
|
uint64_t time_;
|
|
uint64_t start_time_;
|
|
uint64_t end_time_;
|
|
std::map<std::string, uint64_t> stats_map_;
|
|
Status status_;
|
|
bool valid_;
|
|
DBImpl* db_impl_;
|
|
};
|
|
|
|
} // namespace ROCKSDB_NAMESPACE
|