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 #pragma once 11 #ifndef ROCKSDB_LITE 12 13 #include "db/compaction/compaction_picker.h" 14 15 namespace ROCKSDB_NAMESPACE { 16 class FIFOCompactionPicker : public CompactionPicker { 17 public: 18 FIFOCompactionPicker(const ImmutableCFOptions& ioptions, 19 const InternalKeyComparator* icmp) 20 : CompactionPicker(ioptions, icmp) {} 21 22 virtual Compaction* PickCompaction( 23 const std::string& cf_name, const MutableCFOptions& mutable_cf_options, 24 VersionStorageInfo* version, LogBuffer* log_buffer, 25 SequenceNumber earliest_memtable_seqno = kMaxSequenceNumber) override; 26 27 virtual Compaction* CompactRange( 28 const std::string& cf_name, const MutableCFOptions& mutable_cf_options, 29 VersionStorageInfo* vstorage, int input_level, int output_level, 30 const CompactRangeOptions& compact_range_options, 31 const InternalKey* begin, const InternalKey* end, 32 InternalKey** compaction_end, bool* manual_conflict, 33 uint64_t max_file_num_to_ignore) override; 34 35 // The maximum allowed output level. Always returns 0. 36 virtual int MaxOutputLevel() const override { return 0; } 37 38 virtual bool NeedsCompaction( 39 const VersionStorageInfo* vstorage) const override; 40 41 private: 42 Compaction* PickTTLCompaction(const std::string& cf_name, 43 const MutableCFOptions& mutable_cf_options, 44 VersionStorageInfo* version, 45 LogBuffer* log_buffer); 46 47 Compaction* PickSizeCompaction(const std::string& cf_name, 48 const MutableCFOptions& mutable_cf_options, 49 VersionStorageInfo* version, 50 LogBuffer* log_buffer); 51 }; 52 } // namespace ROCKSDB_NAMESPACE 53 #endif // !ROCKSDB_LITE 54