hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/SteppingSplitPolicy.java

   1 /**
   2  * Licensed to the Apache Software Foundation (ASF) under one
   3  * or more contributor license agreements.  See the NOTICE file
   4  * distributed with this work for additional information
   5  * regarding copyright ownership.  The ASF licenses this file
   6  * to you under the Apache License, Version 2.0 (the
   7  * "License"); you may not use this file except in compliance
   8  * with the License.  You may obtain a copy of the License at
   9  *
  10  *     http://www.apache.org/licenses/LICENSE-2.0
  11  *
  12  * Unless required by applicable law or agreed to in writing, software
  13  * distributed under the License is distributed on an "AS IS" BASIS,
  14  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  15  * See the License for the specific language governing permissions and
  16  * limitations under the License.
  17  */
  18 package org.apache.hadoop.hbase.regionserver;
  19
  20 import org.apache.yetus.audience.InterfaceAudience;
  21
  22 @InterfaceAudience.Private
  23 public class SteppingSplitPolicy extends IncreasingToUpperBoundRegionSplitPolicy {
  24   /**
  25    * @return flushSize * 2 if there's exactly one region of the table in question
  26    * found on this regionserver. Otherwise max file size.
  27    * This allows a table to spread quickly across servers, while avoiding creating
  28    * too many regions.
  29    */
  30   @Override
  31   protected long getSizeToCheck(final int tableRegionsCount) {
  32     return tableRegionsCount == 1  ? this.initialSize : getDesiredMaxFileSize();
  33   }
  34
  35
  36 }