9edda37027
Summary: This patch adds a option for universal compaction to allow us to only compress output files if the files compacted previously did not yet reach a specified ratio, to save CPU costs in some cases. Compression is always skipped for flushing. This is because the size information is not easy to evaluate for flushing case. We can improve it later. Test Plan: add test DBTest.UniversalCompactionCompressRatio1 and DBTest.UniversalCompactionCompressRatio12 Reviewers: dhruba, haobo Reviewed By: dhruba CC: leveldb Differential Revision: https://reviews.facebook.net/D13467
42 lines
1.6 KiB
C++
42 lines
1.6 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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// 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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#pragma once
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#include "rocksdb/comparator.h"
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#include "rocksdb/status.h"
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#include "rocksdb/types.h"
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namespace rocksdb {
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struct Options;
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struct FileMetaData;
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class Env;
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class EnvOptions;
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class Iterator;
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class TableCache;
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class VersionEdit;
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// Build a Table file from the contents of *iter. The generated file
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// will be named according to meta->number. On success, the rest of
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// *meta will be filled with metadata about the generated table.
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// If no data is present in *iter, meta->file_size will be set to
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// zero, and no Table file will be produced.
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extern Status BuildTable(const std::string& dbname,
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Env* env,
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const Options& options,
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const EnvOptions& soptions,
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TableCache* table_cache,
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Iterator* iter,
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FileMetaData* meta,
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const Comparator* user_comparator,
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const SequenceNumber newest_snapshot,
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const SequenceNumber earliest_seqno_in_memtable,
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const bool enable_compression);
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} // namespace rocksdb
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