d169b67680
Summary: In PlainTable, use one single byte to represent 8 bytes of internal bytes, if seqID = 0 and it is value type (which should be common for bottom most files). It is to save 7 bytes for uncompressed cases. Test Plan: make all check Reviewers: haobo, dhruba, kailiu Reviewed By: haobo CC: igor, leveldb Differential Revision: https://reviews.facebook.net/D15489
72 lines
2.7 KiB
C++
72 lines
2.7 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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#include "table/block_based_table_factory.h"
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#include <memory>
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#include <stdint.h>
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#include "table/block_based_table_builder.h"
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#include "table/block_based_table_reader.h"
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#include "port/port.h"
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namespace rocksdb {
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Status BlockBasedTableFactory::NewTableReader(
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const Options& options, const EnvOptions& soptions,
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const InternalKeyComparator& internal_comparator,
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unique_ptr<RandomAccessFile>&& file, uint64_t file_size,
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unique_ptr<TableReader>* table_reader) const {
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return BlockBasedTable::Open(options, soptions, table_options_,
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internal_comparator, std::move(file), file_size,
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table_reader);
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}
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TableBuilder* BlockBasedTableFactory::NewTableBuilder(
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const Options& options, const InternalKeyComparator& internal_comparator,
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WritableFile* file, CompressionType compression_type) const {
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auto flush_block_policy_factory =
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table_options_.flush_block_policy_factory.get();
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// if flush block policy factory is not set, we'll create the default one
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// from the options.
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//
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// NOTE: we cannot pre-cache the "default block policy factory" because
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// `FlushBlockBySizePolicyFactory` takes `options.block_size` and
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// `options.block_size_deviation` as parameters, which may be different
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// every time.
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if (flush_block_policy_factory == nullptr) {
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flush_block_policy_factory =
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new FlushBlockBySizePolicyFactory(options.block_size,
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options.block_size_deviation);
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}
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auto table_builder =
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new BlockBasedTableBuilder(options, internal_comparator, file,
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flush_block_policy_factory, compression_type);
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// Delete flush_block_policy_factory only when it's just created from the
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// options.
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// We can safely delete flush_block_policy_factory since it will only be used
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// during the construction of `BlockBasedTableBuilder`.
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if (flush_block_policy_factory !=
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table_options_.flush_block_policy_factory.get()) {
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delete flush_block_policy_factory;
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}
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return table_builder;
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}
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TableFactory* NewBlockBasedTableFactory(
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const BlockBasedTableOptions& table_options) {
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return new BlockBasedTableFactory(table_options);
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}
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} // namespace rocksdb
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