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

/**
 * 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 org.apache.hadoop.hbase.regionserver;

import org.apache.yetus.audience.InterfaceAudience;

@InterfaceAudience.Private
public class SteppingSplitPolicy extends IncreasingToUpperBoundRegionSplitPolicy {
  /**
   * @return flushSize * 2 if there's exactly one region of the table in question
   * found on this regionserver. Otherwise max file size.
   * This allows a table to spread quickly across servers, while avoiding creating
   * too many regions.
   */
  @Override
  protected long getSizeToCheck(final int tableRegionsCount) {
    return tableRegionsCount == 1  ? this.initialSize : getDesiredMaxFileSize();
  }


}