content: /**
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you under the Apache License, Version 2.0 (the
   * "License"); you may not use this file except in compliance
   * with the License.  You may obtain a copy of the License at
   *
   * http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package com.alibaba.jstorm.cache.rocksdb;
  
  import org.rocksdb.*;
  import org.rocksdb.util.SizeUnit;
  
  public interface RocksDbOptionsFactory {
      public Options createOptions(Options currentOptions);
  
      public DBOptions createDbOptions(DBOptions currentOptions);
  
      public ColumnFamilyOptions createColumnFamilyOptions(ColumnFamilyOptions currentOptions);
  
      public class Defaults implements RocksDbOptionsFactory {
          private static final int DEFAULT_BLOOM_FILTER_BITS = 10;
  
          @Override
          public Options createOptions(Options currentOptions) {
              if (currentOptions == null)
                  currentOptions = new Options();
              currentOptions.setCreateIfMissing(true);
              currentOptions.setCreateMissingColumnFamilies(true);
              currentOptions.setMergeOperator(new StringAppendOperator());
  
              BlockBasedTableConfig tableOptions = new BlockBasedTableConfig();
              tableOptions.setBlockSize(32 * SizeUnit.KB);
  
              // Set memory table size
              currentOptions.setMaxWriteBufferNumber(4);
              currentOptions.setWriteBufferSize(64 * SizeUnit.MB);
  
              // Set block cache size
              tableOptions.setBlockCacheSize(64 * SizeUnit.MB);
              tableOptions.setFilter(new BloomFilter(DEFAULT_BLOOM_FILTER_BITS, false));
              // Put all index into block cache
              tableOptions.setCacheIndexAndFilterBlocks(true);
  
              /*
              tableOptions.setIndexType(IndexType.kHashSearch);
              tableOptions.setWholeKeyFiltering(false);
              currentOptions.setMemTableConfig(new HashLinkedListMemTableConfig());
              currentOptions.useFixedLengthPrefixExtractor(Integer.SIZE / Byte.SIZE * 2);
              currentOptions.setMemtablePrefixBloomBits(10000000);
              currentOptions.setMemtablePrefixBloomProbes(6);
              */
  
              currentOptions.setTableFormatConfig(tableOptions);
  
              //currentOptions.setStatsDumpPeriodSec(300);
              //currentOptions.createStatistics();
  
              currentOptions.setTargetFileSizeBase(64 * SizeUnit.MB);
              currentOptions.setAllowOsBuffer(true);
              currentOptions.setMaxOpenFiles(-1);
              currentOptions.setMaxBackgroundFlushes(2);
              currentOptions.setMaxBackgroundCompactions(2);
              currentOptions.setCompactionStyle(CompactionStyle.LEVEL);
              currentOptions.setLevelZeroFileNumCompactionTrigger(4);
              currentOptions.setLevelZeroSlowdownWritesTrigger(20);
              currentOptions.setLevelZeroStopWritesTrigger(30);
              currentOptions.setNumLevels(4);
              currentOptions.setMaxBytesForLevelBase(64 * 4 * SizeUnit.MB);
              currentOptions.setAllowOsBuffer(false);
              return currentOptions;
          }
  
          @Override
          public DBOptions createDbOptions(DBOptions currentOptions) {
              if (currentOptions == null)
                  currentOptions = new DBOptions();
              currentOptions.setCreateIfMissing(true);
              currentOptions.setCreateMissingColumnFamilies(true);
              //currentOptions.setMemTableConfig(new HashLinkedListMemTableConfig());
              //currentOptions.setStatsDumpPeriodSec(300);
              //currentOptions.createStatistics();
              currentOptions.setAllowOsBuffer(true);
              currentOptions.setMaxOpenFiles(-1);
              currentOptions.setMaxBackgroundFlushes(2);
              currentOptions.setMaxBackgroundCompactions(2);
              currentOptions.setAllowOsBuffer(false);
              return currentOptions;
          }
  
          @Override
          public ColumnFamilyOptions createColumnFamilyOptions(ColumnFamilyOptions currentOptions) {
              if (currentOptions == null)
                  currentOptions = new ColumnFamilyOptions();
              currentOptions.setMergeOperator(new StringAppendOperator());
  
              BlockBasedTableConfig tableOptions = new BlockBasedTableConfig();
              tableOptions.setBlockSize(32 * SizeUnit.KB);
  
              // Set memory table size
              currentOptions.setMaxWriteBufferNumber(4);
              currentOptions.setWriteBufferSize(64 * SizeUnit.MB);
  
              // Set block cache size
              tableOptions.setBlockCacheSize(64 * SizeUnit.MB);
              tableOptions.setFilter(new BloomFilter(DEFAULT_BLOOM_FILTER_BITS, false));
              // Put all index into block cache
              tableOptions.setCacheIndexAndFilterBlocks(true);
              /*
              tableOptions.setIndexType(IndexType.kHashSearch);
              tableOptions.setWholeKeyFiltering(false);*/
  
              /*
              currentOptions.useFixedLengthPrefixExtractor(Integer.SIZE / Byte.SIZE * 2);
              currentOptions.setMemtablePrefixBloomBits(10000000);
              currentOptions.setMemtablePrefixBloomProbes(6);
              */
  
              currentOptions.setTableFormatConfig(tableOptions);
  
              currentOptions.setTargetFileSizeBase(64 * SizeUnit.MB);
              currentOptions.setCompactionStyle(CompactionStyle.LEVEL);
              currentOptions.setLevelZeroFileNumCompactionTrigger(4);
              currentOptions.setLevelZeroSlowdownWritesTrigger(20);
              currentOptions.setLevelZeroStopWritesTrigger(30);
              currentOptions.setNumLevels(4);
              currentOptions.setMaxBytesForLevelBase(64 * 4 * SizeUnit.MB);
              return currentOptions;
          }
      }
  }