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 java.util.ArrayList;
021import java.util.List;
022import java.util.Map;
023import java.util.TreeMap;
024import org.apache.hadoop.hbase.HBaseClassTestRule;
025import org.apache.hadoop.hbase.ServerName;
026import org.apache.hadoop.hbase.client.RegionInfo;
027import org.apache.hadoop.hbase.testclassification.MasterTests;
028import org.apache.hadoop.hbase.testclassification.MediumTests;
029import org.junit.ClassRule;
030import org.junit.Test;
031import org.junit.experimental.categories.Category;
032
033@Category({ MasterTests.class, MediumTests.class })
034public class TestStochasticLoadBalancerRegionReplicaSameHosts extends BalancerTestBase {
035
036  @ClassRule
037  public static final HBaseClassTestRule CLASS_RULE =
038      HBaseClassTestRule.forClass(TestStochasticLoadBalancerRegionReplicaSameHosts.class);
039
040  @Test
041  public void testRegionReplicationOnMidClusterSameHosts() {
042    conf.setLong(StochasticLoadBalancer.MAX_STEPS_KEY, 2000000L);
043    conf.setLong("hbase.master.balancer.stochastic.maxRunningTime", 90 * 1000); // 90 sec
044    conf.setFloat("hbase.master.balancer.stochastic.maxMovePercent", 1.0f);
045    loadBalancer.setConf(conf);
046    int numHosts = 30;
047    int numRegions = 30 * 30;
048    int replication = 3; // 3 replicas per region
049    int numRegionsPerServer = 5;
050    int numTables = 10;
051    Map<ServerName, List<RegionInfo>> serverMap =
052        createServerMap(numHosts, numRegions, numRegionsPerServer, replication, numTables);
053    int numNodesPerHost = 4;
054
055    // create a new map with 4 RS per host.
056    Map<ServerName, List<RegionInfo>> newServerMap = new TreeMap<>(serverMap);
057    for (Map.Entry<ServerName, List<RegionInfo>> entry : serverMap.entrySet()) {
058      for (int i = 1; i < numNodesPerHost; i++) {
059        ServerName s1 = entry.getKey();
060        // create an RS for the same host
061        ServerName s2 = ServerName.valueOf(s1.getHostname(), s1.getPort() + i, 1);
062        newServerMap.put(s2, new ArrayList<>());
063      }
064    }
065
066    testWithCluster(newServerMap, null, true, true);
067  }
068}