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// 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/compaction/compaction_picker.h"
namespace ROCKSDB_NAMESPACE {
// Picking compactions for leveled compaction. See wiki page
// https://github.com/facebook/rocksdb/wiki/Leveled-Compaction
// for description of Leveled compaction.
class LevelCompactionPicker : public CompactionPicker {
public:
LevelCompactionPicker(const ImmutableOptions& ioptions,
const InternalKeyComparator* icmp)
: CompactionPicker(ioptions, icmp) {}
virtual Compaction* PickCompaction(
const std::string& cf_name, const MutableCFOptions& mutable_cf_options,
const MutableDBOptions& mutable_db_options, VersionStorageInfo* vstorage,
LogBuffer* log_buffer,
SequenceNumber earliest_memtable_seqno = kMaxSequenceNumber) override;
virtual bool NeedsCompaction(
const VersionStorageInfo* vstorage) const override;
};
} // namespace ROCKSDB_NAMESPACE
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