001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018package org.apache.hadoop.hbase.master.balancer;
019
020import org.apache.hadoop.conf.Configuration;
021import org.apache.hadoop.hbase.master.balancer.BalancerClusterState.LocalityType;
022import org.apache.yetus.audience.InterfaceAudience;
023
024@InterfaceAudience.Private
025class ServerLocalityCostFunction extends LocalityBasedCostFunction {
026
027  private static final String LOCALITY_COST_KEY = "hbase.master.balancer.stochastic.localityCost";
028  private static final float DEFAULT_LOCALITY_COST = 25;
029
030  ServerLocalityCostFunction(Configuration conf) {
031    super(conf, LocalityType.SERVER, LOCALITY_COST_KEY, DEFAULT_LOCALITY_COST);
032  }
033
034  @Override
035  int regionIndexToEntityIndex(int region) {
036    return cluster.regionIndexToServerIndex[region];
037  }
038}