| /** |
| * 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.master; |
| |
| import static org.junit.Assert.*; |
| |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Set; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.hbase.HBaseIOException; |
| import org.apache.hadoop.hbase.HBaseTestingUtility; |
| import org.apache.hadoop.hbase.HConstants; |
| import org.apache.hadoop.hbase.HRegionInfo; |
| import org.apache.hadoop.hbase.ServerName; |
| import org.apache.hadoop.hbase.TableName; |
| import org.apache.hadoop.hbase.master.balancer.FavoredNodeLoadBalancer; |
| import org.apache.hadoop.hbase.master.balancer.LoadBalancerFactory; |
| import org.apache.hadoop.hbase.master.balancer.FavoredNodesPlan.Position; |
| import org.apache.hadoop.hbase.testclassification.MasterTests; |
| import org.apache.hadoop.hbase.testclassification.MediumTests; |
| import org.junit.AfterClass; |
| import org.junit.BeforeClass; |
| import org.junit.Test; |
| import org.junit.experimental.categories.Category; |
| |
| @Category({MasterTests.class, MediumTests.class}) |
| public class TestRegionPlacement2 { |
| private static final Log LOG = LogFactory.getLog(TestRegionPlacement2.class); |
| private final static HBaseTestingUtility TEST_UTIL = new HBaseTestingUtility(); |
| private final static int SLAVES = 7; |
| private final static int PRIMARY = Position.PRIMARY.ordinal(); |
| private final static int SECONDARY = Position.SECONDARY.ordinal(); |
| private final static int TERTIARY = Position.TERTIARY.ordinal(); |
| |
| @BeforeClass |
| public static void setupBeforeClass() throws Exception { |
| Configuration conf = TEST_UTIL.getConfiguration(); |
| // Enable the favored nodes based load balancer |
| conf.setClass(HConstants.HBASE_MASTER_LOADBALANCER_CLASS, |
| FavoredNodeLoadBalancer.class, LoadBalancer.class); |
| conf.setBoolean("hbase.tests.use.shortcircuit.reads", false); |
| TEST_UTIL.startMiniCluster(SLAVES); |
| } |
| |
| @AfterClass |
| public static void tearDownAfterClass() throws Exception { |
| TEST_UTIL.shutdownMiniCluster(); |
| } |
| |
| @Test |
| public void testFavoredNodesPresentForRoundRobinAssignment() throws HBaseIOException { |
| LoadBalancer balancer = LoadBalancerFactory.getLoadBalancer(TEST_UTIL.getConfiguration()); |
| balancer.setMasterServices(TEST_UTIL.getMiniHBaseCluster().getMaster()); |
| List<ServerName> servers = new ArrayList<ServerName>(); |
| for (int i = 0; i < SLAVES; i++) { |
| ServerName server = TEST_UTIL.getMiniHBaseCluster().getRegionServer(i).getServerName(); |
| servers.add(server); |
| } |
| List<HRegionInfo> regions = new ArrayList<HRegionInfo>(1); |
| HRegionInfo region = new HRegionInfo(TableName.valueOf("foobar")); |
| regions.add(region); |
| Map<ServerName,List<HRegionInfo>> assignmentMap = balancer.roundRobinAssignment(regions, |
| servers); |
| Set<ServerName> serverBefore = assignmentMap.keySet(); |
| List<ServerName> favoredNodesBefore = |
| ((FavoredNodeLoadBalancer)balancer).getFavoredNodes(region); |
| assertTrue(favoredNodesBefore.size() == 3); |
| // the primary RS should be the one that the balancer's assignment returns |
| assertTrue(ServerName.isSameHostnameAndPort(serverBefore.iterator().next(), |
| favoredNodesBefore.get(PRIMARY))); |
| // now remove the primary from the list of available servers |
| List<ServerName> removedServers = removeMatchingServers(serverBefore, servers); |
| // call roundRobinAssignment with the modified servers list |
| assignmentMap = balancer.roundRobinAssignment(regions, servers); |
| List<ServerName> favoredNodesAfter = |
| ((FavoredNodeLoadBalancer)balancer).getFavoredNodes(region); |
| assertTrue(favoredNodesAfter.size() == 3); |
| // We don't expect the favored nodes assignments to change in multiple calls |
| // to the roundRobinAssignment method in the balancer (relevant for AssignmentManager.assign |
| // failures) |
| assertTrue(favoredNodesAfter.containsAll(favoredNodesBefore)); |
| Set<ServerName> serverAfter = assignmentMap.keySet(); |
| // We expect the new RegionServer assignee to be one of the favored nodes |
| // chosen earlier. |
| assertTrue(ServerName.isSameHostnameAndPort(serverAfter.iterator().next(), |
| favoredNodesBefore.get(SECONDARY)) || |
| ServerName.isSameHostnameAndPort(serverAfter.iterator().next(), |
| favoredNodesBefore.get(TERTIARY))); |
| |
| // put back the primary in the list of available servers |
| servers.addAll(removedServers); |
| // now roundRobinAssignment with the modified servers list should return the primary |
| // as the regionserver assignee |
| assignmentMap = balancer.roundRobinAssignment(regions, servers); |
| Set<ServerName> serverWithPrimary = assignmentMap.keySet(); |
| assertTrue(serverBefore.containsAll(serverWithPrimary)); |
| |
| // Make all the favored nodes unavailable for assignment |
| removeMatchingServers(favoredNodesAfter, servers); |
| // call roundRobinAssignment with the modified servers list |
| assignmentMap = balancer.roundRobinAssignment(regions, servers); |
| List<ServerName> favoredNodesNow = |
| ((FavoredNodeLoadBalancer)balancer).getFavoredNodes(region); |
| assertTrue(favoredNodesNow.size() == 3); |
| assertTrue(!favoredNodesNow.contains(favoredNodesAfter.get(PRIMARY)) && |
| !favoredNodesNow.contains(favoredNodesAfter.get(SECONDARY)) && |
| !favoredNodesNow.contains(favoredNodesAfter.get(TERTIARY))); |
| } |
| |
| @Test |
| public void testFavoredNodesPresentForRandomAssignment() throws HBaseIOException { |
| LoadBalancer balancer = LoadBalancerFactory.getLoadBalancer(TEST_UTIL.getConfiguration()); |
| balancer.setMasterServices(TEST_UTIL.getMiniHBaseCluster().getMaster()); |
| List<ServerName> servers = new ArrayList<ServerName>(); |
| for (int i = 0; i < SLAVES; i++) { |
| ServerName server = TEST_UTIL.getMiniHBaseCluster().getRegionServer(i).getServerName(); |
| servers.add(server); |
| } |
| List<HRegionInfo> regions = new ArrayList<HRegionInfo>(1); |
| HRegionInfo region = new HRegionInfo(TableName.valueOf("foobar")); |
| regions.add(region); |
| ServerName serverBefore = balancer.randomAssignment(region, servers); |
| List<ServerName> favoredNodesBefore = |
| ((FavoredNodeLoadBalancer)balancer).getFavoredNodes(region); |
| assertTrue(favoredNodesBefore.size() == 3); |
| // the primary RS should be the one that the balancer's assignment returns |
| assertTrue(ServerName.isSameHostnameAndPort(serverBefore,favoredNodesBefore.get(PRIMARY))); |
| // now remove the primary from the list of servers |
| removeMatchingServers(serverBefore, servers); |
| // call randomAssignment with the modified servers list |
| ServerName serverAfter = balancer.randomAssignment(region, servers); |
| List<ServerName> favoredNodesAfter = |
| ((FavoredNodeLoadBalancer)balancer).getFavoredNodes(region); |
| assertTrue(favoredNodesAfter.size() == 3); |
| // We don't expect the favored nodes assignments to change in multiple calls |
| // to the randomAssignment method in the balancer (relevant for AssignmentManager.assign |
| // failures) |
| assertTrue(favoredNodesAfter.containsAll(favoredNodesBefore)); |
| // We expect the new RegionServer assignee to be one of the favored nodes |
| // chosen earlier. |
| assertTrue(ServerName.isSameHostnameAndPort(serverAfter, favoredNodesBefore.get(SECONDARY)) || |
| ServerName.isSameHostnameAndPort(serverAfter, favoredNodesBefore.get(TERTIARY))); |
| // Make all the favored nodes unavailable for assignment |
| removeMatchingServers(favoredNodesAfter, servers); |
| // call randomAssignment with the modified servers list |
| balancer.randomAssignment(region, servers); |
| List<ServerName> favoredNodesNow = |
| ((FavoredNodeLoadBalancer)balancer).getFavoredNodes(region); |
| assertTrue(favoredNodesNow.size() == 3); |
| assertTrue(!favoredNodesNow.contains(favoredNodesAfter.get(PRIMARY)) && |
| !favoredNodesNow.contains(favoredNodesAfter.get(SECONDARY)) && |
| !favoredNodesNow.contains(favoredNodesAfter.get(TERTIARY))); |
| } |
| |
| private List<ServerName> removeMatchingServers(Collection<ServerName> serversWithoutStartCode, |
| List<ServerName> servers) { |
| List<ServerName> serversToRemove = new ArrayList<ServerName>(); |
| for (ServerName s : serversWithoutStartCode) { |
| serversToRemove.addAll(removeMatchingServers(s, servers)); |
| } |
| return serversToRemove; |
| } |
| |
| private List<ServerName> removeMatchingServers(ServerName serverWithoutStartCode, |
| List<ServerName> servers) { |
| List<ServerName> serversToRemove = new ArrayList<ServerName>(); |
| for (ServerName s : servers) { |
| if (ServerName.isSameHostnameAndPort(s, serverWithoutStartCode)) { |
| serversToRemove.add(s); |
| } |
| } |
| servers.removeAll(serversToRemove); |
| return serversToRemove; |
| } |
| } |