ceph/src/rocksdb/utilities/leveldb_options/leveldb_options.cc

   1 //  Copyright (c) 2011-present, Facebook, Inc.  All rights reserved.
   2 //  This source code is licensed under both the GPLv2 (found in the
   3 //  COPYING file in the root directory) and Apache 2.0 License
   4 //  (found in the LICENSE.Apache file in the root directory).
   5 //
   6 // Copyright (c) 2011 The LevelDB Authors. All rights reserved.
   7 // Use of this source code is governed by a BSD-style license that can be
   8 // found in the LICENSE file. See the AUTHORS file for names of contributors.
   9
  10 #include "rocksdb/utilities/leveldb_options.h"
  11 #include "rocksdb/cache.h"
  12 #include "rocksdb/comparator.h"
  13 #include "rocksdb/env.h"
  14 #include "rocksdb/filter_policy.h"
  15 #include "rocksdb/options.h"
  16 #include "rocksdb/table.h"
  17
  18 namespace rocksdb {
  19
  20 LevelDBOptions::LevelDBOptions()
  21     : comparator(BytewiseComparator()),
  22       create_if_missing(false),
  23       error_if_exists(false),
  24       paranoid_checks(false),
  25       env(Env::Default()),
  26       info_log(nullptr),
  27       write_buffer_size(4 << 20),
  28       max_open_files(1000),
  29       block_cache(nullptr),
  30       block_size(4096),
  31       block_restart_interval(16),
  32       compression(kSnappyCompression),
  33       filter_policy(nullptr) {}
  34
  35 Options ConvertOptions(const LevelDBOptions& leveldb_options) {
  36   Options options = Options();
  37   options.create_if_missing = leveldb_options.create_if_missing;
  38   options.error_if_exists = leveldb_options.error_if_exists;
  39   options.paranoid_checks = leveldb_options.paranoid_checks;
  40   options.env = leveldb_options.env;
  41   options.info_log.reset(leveldb_options.info_log);
  42   options.write_buffer_size = leveldb_options.write_buffer_size;
  43   options.max_open_files = leveldb_options.max_open_files;
  44   options.compression = leveldb_options.compression;
  45
  46   BlockBasedTableOptions table_options;
  47   table_options.block_cache.reset(leveldb_options.block_cache);
  48   table_options.block_size = leveldb_options.block_size;
  49   table_options.block_restart_interval = leveldb_options.block_restart_interval;
  50   table_options.filter_policy.reset(leveldb_options.filter_policy);
  51   options.table_factory.reset(NewBlockBasedTableFactory(table_options));
  52
  53   return options;
  54 }
  55
  56 }  // namespace rocksdb