text: //  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).
  
  #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
  