0abaed2e08
Summary: This patch adds a target size parameter in options.db_paths and universal compaction will base it to determine which DB path to place a new file. Level-style stays the same. Test Plan: Add new unit tests Reviewers: ljin, yhchiang Reviewed By: yhchiang Subscribers: MarkCallaghan, dhruba, igor, leveldb Differential Revision: https://reviews.facebook.net/D19869
121 lines
4.6 KiB
C++
121 lines
4.6 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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//
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// File names used by DB code
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#pragma once
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#include <stdint.h>
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#include <unordered_map>
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#include <string>
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#include <vector>
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#include "rocksdb/slice.h"
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#include "rocksdb/status.h"
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#include "rocksdb/transaction_log.h"
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#include "port/port.h"
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namespace rocksdb {
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class Env;
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class Directory;
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enum FileType {
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kLogFile,
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kDBLockFile,
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kTableFile,
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kDescriptorFile,
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kCurrentFile,
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kTempFile,
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kInfoLogFile, // Either the current one, or an old one
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kMetaDatabase,
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kIdentityFile
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};
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// map from file number to path ID.
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typedef std::unordered_map<uint64_t, uint32_t> FileNumToPathIdMap;
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// Return the name of the log file with the specified number
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// in the db named by "dbname". The result will be prefixed with
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// "dbname".
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extern std::string LogFileName(const std::string& dbname, uint64_t number);
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static const std::string ARCHIVAL_DIR = "archive";
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extern std::string ArchivalDirectory(const std::string& dbname);
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// Return the name of the archived log file with the specified number
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// in the db named by "dbname". The result will be prefixed with "dbname".
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extern std::string ArchivedLogFileName(const std::string& dbname,
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uint64_t num);
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extern std::string MakeTableFileName(const std::string& name, uint64_t number);
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// Return the name of the sstable with the specified number
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// in the db named by "dbname". The result will be prefixed with
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// "dbname".
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extern std::string TableFileName(const std::vector<DbPath>& db_paths,
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uint64_t number, uint32_t path_id);
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extern std::string FormatFileNumber(uint64_t number, uint32_t path_id);
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// Return the name of the descriptor file for the db named by
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// "dbname" and the specified incarnation number. The result will be
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// prefixed with "dbname".
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extern std::string DescriptorFileName(const std::string& dbname,
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uint64_t number);
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// Return the name of the current file. This file contains the name
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// of the current manifest file. The result will be prefixed with
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// "dbname".
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extern std::string CurrentFileName(const std::string& dbname);
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// Return the name of the lock file for the db named by
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// "dbname". The result will be prefixed with "dbname".
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extern std::string LockFileName(const std::string& dbname);
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// Return the name of a temporary file owned by the db named "dbname".
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// The result will be prefixed with "dbname".
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extern std::string TempFileName(const std::string& dbname, uint64_t number);
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// Return the name of the info log file for "dbname".
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extern std::string InfoLogFileName(const std::string& dbname,
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const std::string& db_path="", const std::string& log_dir="");
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// Return the name of the old info log file for "dbname".
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extern std::string OldInfoLogFileName(const std::string& dbname, uint64_t ts,
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const std::string& db_path="", const std::string& log_dir="");
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// Return the name to use for a metadatabase. The result will be prefixed with
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// "dbname".
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extern std::string MetaDatabaseName(const std::string& dbname,
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uint64_t number);
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// Return the name of the Identity file which stores a unique number for the db
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// that will get regenerated if the db loses all its data and is recreated fresh
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// either from a backup-image or empty
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extern std::string IdentityFileName(const std::string& dbname);
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// If filename is a rocksdb file, store the type of the file in *type.
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// The number encoded in the filename is stored in *number. If the
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// filename was successfully parsed, returns true. Else return false.
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extern bool ParseFileName(const std::string& filename,
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uint64_t* number,
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FileType* type,
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WalFileType* log_type = nullptr);
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// Make the CURRENT file point to the descriptor file with the
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// specified number.
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extern Status SetCurrentFile(Env* env, const std::string& dbname,
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uint64_t descriptor_number,
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Directory* directory_to_fsync);
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// Make the IDENTITY file for the db
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extern Status SetIdentityFile(Env* env, const std::string& dbname);
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} // namespace rocksdb
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