rocksdb/include/rocksdb/utilities/table_properties_collectors.h

//  Copyright (c) 2015, Facebook, Inc.  All rights reserved.
//  This source code is licensed under the BSD-style license found in the
//  LICENSE file in the root directory of this source tree. An additional grant
//  of patent rights can be found in the PATENTS file in the same directory.

#pragma once
#ifndef ROCKSDB_LITE
#include <memory>

#include "rocksdb/table_properties.h"

namespace rocksdb {

// Creates a factory of a table property collector that marks a SST
// file as need-compaction when it observe at least "D" deletion
// entries in any "N" consecutive entires.
//
// @param sliding_window_size "N". Note that this number will be
//     round up to the smallest multiple of 128 that is no less
//     than the specified size.
// @param deletion_trigger "D".  Note that even when "N" is changed,
//     the specified number for "D" will not be changed.
extern std::shared_ptr<TablePropertiesCollectorFactory>
    NewCompactOnDeletionCollectorFactory(
        size_t sliding_window_size,
        size_t deletion_trigger);
}  // namespace rocksdb

#endif  // !ROCKSDB_LITE