| /* |
| * 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.accumulo.core.spi.balancer; |
| |
| import static org.easymock.EasyMock.anyObject; |
| import static org.easymock.EasyMock.createMock; |
| import static org.easymock.EasyMock.expect; |
| import static org.easymock.EasyMock.replay; |
| import static org.junit.Assert.assertEquals; |
| |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Set; |
| import java.util.SortedMap; |
| import java.util.TreeMap; |
| import java.util.stream.Collectors; |
| |
| import org.apache.accumulo.core.conf.ConfigurationCopy; |
| import org.apache.accumulo.core.conf.Property; |
| import org.apache.accumulo.core.data.TableId; |
| import org.apache.accumulo.core.data.TabletId; |
| import org.apache.accumulo.core.dataImpl.KeyExtent; |
| import org.apache.accumulo.core.manager.balancer.BalanceParamsImpl; |
| import org.apache.accumulo.core.manager.balancer.TServerStatusImpl; |
| import org.apache.accumulo.core.manager.balancer.TabletServerIdImpl; |
| import org.apache.accumulo.core.manager.balancer.TabletStatisticsImpl; |
| import org.apache.accumulo.core.master.thrift.TableInfo; |
| import org.apache.accumulo.core.spi.balancer.data.TServerStatus; |
| import org.apache.accumulo.core.spi.balancer.data.TabletMigration; |
| import org.apache.accumulo.core.spi.balancer.data.TabletServerId; |
| import org.apache.accumulo.core.spi.balancer.data.TabletStatistics; |
| import org.apache.accumulo.core.tabletserver.thrift.TabletStats; |
| import org.apache.accumulo.core.util.ConfigurationImpl; |
| import org.apache.hadoop.io.Text; |
| import org.junit.Test; |
| |
| public class TableLoadBalancerTest { |
| |
| private static final Map<String,String> TABLE_ID_MAP = |
| Map.of("t1", "a1", "t2", "b12", "t3", "c4"); |
| |
| private static TabletServerId mkts(String host, int port, String session) { |
| return new TabletServerIdImpl(host, port, session); |
| } |
| |
| private static TServerStatus status(Object... config) { |
| org.apache.accumulo.core.master.thrift.TabletServerStatus thriftStatus = |
| new org.apache.accumulo.core.master.thrift.TabletServerStatus(); |
| thriftStatus.tableMap = new HashMap<>(); |
| String tablename = null; |
| for (Object c : config) { |
| if (c instanceof String) { |
| tablename = (String) c; |
| } else { |
| TableInfo info = new TableInfo(); |
| int count = (Integer) c; |
| info.onlineTablets = count; |
| info.tablets = count; |
| thriftStatus.tableMap.put(tablename, info); |
| } |
| } |
| return new TServerStatusImpl(thriftStatus); |
| } |
| |
| static SortedMap<TabletServerId,TServerStatus> state; |
| |
| static List<TabletStatistics> generateFakeTablets(TabletServerId tserver, TableId tableId) { |
| List<TabletStatistics> result = new ArrayList<>(); |
| TServerStatus tableInfo = state.get(tserver); |
| // generate some fake tablets |
| for (int i = 0; i < tableInfo.getTableMap().get(tableId.canonical()).getOnlineTabletCount(); |
| i++) { |
| TabletStats stats = new TabletStats(); |
| stats.extent = |
| new KeyExtent(tableId, new Text(tserver.getHost() + String.format("%03d", i + 1)), |
| new Text(tserver.getHost() + String.format("%03d", i))).toThrift(); |
| result.add(new TabletStatisticsImpl(stats)); |
| } |
| return result; |
| } |
| |
| public static class TestSimpleLoadBalancer extends SimpleLoadBalancer { |
| |
| public TestSimpleLoadBalancer(TableId table) { |
| super(table); |
| } |
| |
| @Override |
| public void init(BalancerEnvironment balancerEnvironment) {} |
| |
| @Override |
| public List<TabletStatistics> getOnlineTabletsForTable(TabletServerId tserver, |
| TableId tableId) { |
| return generateFakeTablets(tserver, tableId); |
| } |
| } |
| |
| @Test |
| public void test() { |
| BalancerEnvironment environment = createMock(BalancerEnvironment.class); |
| ConfigurationCopy cc = new ConfigurationCopy( |
| Map.of(Property.TABLE_LOAD_BALANCER.getKey(), TestSimpleLoadBalancer.class.getName())); |
| ConfigurationImpl tableConfig = new ConfigurationImpl(cc); |
| |
| Map<String,TableId> tableIdMap = TABLE_ID_MAP.entrySet().stream() |
| .collect(Collectors.toMap(Map.Entry::getKey, e -> TableId.of(e.getValue()))); |
| expect(environment.getTableIdMap()).andReturn(tableIdMap).anyTimes(); |
| expect(environment.isTableOnline(anyObject(TableId.class))).andReturn(true).anyTimes(); |
| expect(environment.getConfiguration(anyObject(TableId.class))).andReturn(tableConfig) |
| .anyTimes(); |
| expect(environment.tableContext(anyObject(TableId.class))).andReturn(null).anyTimes(); |
| |
| replay(environment); |
| |
| String t1Id = TABLE_ID_MAP.get("t1"), t2Id = TABLE_ID_MAP.get("t2"), |
| t3Id = TABLE_ID_MAP.get("t3"); |
| state = new TreeMap<>(); |
| TabletServerId svr = mkts("10.0.0.1", 1234, "0x01020304"); |
| state.put(svr, status(t1Id, 10, t2Id, 10, t3Id, 10)); |
| |
| Set<TabletId> migrations = Collections.emptySet(); |
| List<TabletMigration> migrationsOut = new ArrayList<>(); |
| TableLoadBalancer tls = new TableLoadBalancer(); |
| tls.init(environment); |
| tls.balance(new BalanceParamsImpl(state, migrations, migrationsOut)); |
| assertEquals(0, migrationsOut.size()); |
| |
| state.put(mkts("10.0.0.2", 2345, "0x02030405"), status()); |
| tls = new TableLoadBalancer(); |
| tls.init(environment); |
| tls.balance(new BalanceParamsImpl(state, migrations, migrationsOut)); |
| int count = 0; |
| Map<TableId,Integer> movedByTable = new HashMap<>(); |
| movedByTable.put(TableId.of(t1Id), 0); |
| movedByTable.put(TableId.of(t2Id), 0); |
| movedByTable.put(TableId.of(t3Id), 0); |
| for (TabletMigration migration : migrationsOut) { |
| if (migration.getOldTabletServer().equals(svr)) { |
| count++; |
| } |
| TableId key = migration.getTablet().getTable(); |
| movedByTable.put(key, movedByTable.get(key) + 1); |
| } |
| assertEquals(15, count); |
| for (Integer moved : movedByTable.values()) { |
| assertEquals(5, moved.intValue()); |
| } |
| } |
| |
| } |