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diff --git a/src/rocksdb/db/compaction/compaction_picker_level.h b/src/rocksdb/db/compaction/compaction_picker_level.h
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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 ImmutableCFOptions& ioptions,
+ const InternalKeyComparator* icmp)
+ : CompactionPicker(ioptions, icmp) {}
+ virtual Compaction* PickCompaction(
+ const std::string& cf_name, const MutableCFOptions& mutable_cf_options,
+ VersionStorageInfo* vstorage, LogBuffer* log_buffer,
+ SequenceNumber earliest_memtable_seqno = kMaxSequenceNumber) override;
+
+ virtual bool NeedsCompaction(
+ const VersionStorageInfo* vstorage) const override;
+};
+
+} // namespace ROCKSDB_NAMESPACE