| /* |
| * 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.balancer; |
| |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.concurrent.TimeUnit; |
| |
| import org.apache.hadoop.hbase.HBaseCommonTestingUtility; |
| import org.apache.hadoop.hbase.HBaseInterfaceAudience; |
| import org.apache.hadoop.hbase.HConstants; |
| import org.apache.hadoop.hbase.ServerName; |
| import org.apache.hadoop.hbase.TableName; |
| import org.apache.hadoop.hbase.client.RegionInfo; |
| import org.apache.hadoop.hbase.client.RegionInfoBuilder; |
| import org.apache.hadoop.hbase.master.LoadBalancer; |
| import org.apache.hadoop.hbase.util.AbstractHBaseTool; |
| import org.apache.hadoop.hbase.util.Bytes; |
| import org.apache.yetus.audience.InterfaceAudience; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| import org.apache.hbase.thirdparty.com.google.common.base.Preconditions; |
| import org.apache.hbase.thirdparty.com.google.common.base.Stopwatch; |
| import org.apache.hbase.thirdparty.org.apache.commons.cli.CommandLine; |
| import org.apache.hbase.thirdparty.org.apache.commons.cli.Option; |
| |
| /** |
| * Tool to test performance of different {@link org.apache.hadoop.hbase.master.LoadBalancer} |
| * implementations. |
| * Example command: |
| * $ bin/hbase org.apache.hadoop.hbase.master.balancer.LoadBalancerPerformanceEvaluation |
| * -regions 1000 -servers 100 |
| * -load_balancer org.apache.hadoop.hbase.master.balancer.SimpleLoadBalancer |
| */ |
| @InterfaceAudience.LimitedPrivate(HBaseInterfaceAudience.TOOLS) |
| public class LoadBalancerPerformanceEvaluation extends AbstractHBaseTool { |
| private static final Logger LOG = |
| LoggerFactory.getLogger(LoadBalancerPerformanceEvaluation.class.getName()); |
| |
| protected static final HBaseCommonTestingUtility UTIL = new HBaseCommonTestingUtility(); |
| |
| private static final int DEFAULT_NUM_REGIONS = 1000000; |
| private static Option NUM_REGIONS_OPT = new Option("regions", true, |
| "Number of regions to consider by load balancer. Default: " + DEFAULT_NUM_REGIONS); |
| |
| private static final int DEFAULT_NUM_SERVERS = 1000; |
| private static Option NUM_SERVERS_OPT = new Option("servers", true, |
| "Number of servers to consider by load balancer. Default: " + DEFAULT_NUM_SERVERS); |
| |
| private static final String DEFAULT_LOAD_BALANCER = |
| "org.apache.hadoop.hbase.master.balancer.StochasticLoadBalancer"; |
| private static Option LOAD_BALANCER_OPT = new Option("load_balancer", true, |
| "Type of Load Balancer to use. Default: " + DEFAULT_LOAD_BALANCER); |
| |
| private int numRegions; |
| private int numServers; |
| private String loadBalancerType; |
| private Class<?> loadBalancerClazz; |
| |
| private LoadBalancer loadBalancer; |
| |
| // data |
| private List<ServerName> servers; |
| private List<RegionInfo> regions; |
| private Map<RegionInfo, ServerName> regionServerMap; |
| private Map<TableName, Map<ServerName, List<RegionInfo>>> tableServerRegionMap; |
| |
| // Non-default configurations. |
| private void setupConf() { |
| conf.setClass(HConstants.HBASE_MASTER_LOADBALANCER_CLASS, loadBalancerClazz, LoadBalancer.class); |
| loadBalancer = LoadBalancerFactory.getLoadBalancer(conf); |
| } |
| |
| private void generateRegionsAndServers() { |
| TableName tableName = TableName.valueOf("LoadBalancerPerfTable"); |
| // regions |
| regions = new ArrayList<>(numRegions); |
| regionServerMap = new HashMap<>(numRegions); |
| for (int i = 0; i < numRegions; ++i) { |
| byte[] start = new byte[16]; |
| byte[] end = new byte[16]; |
| |
| Bytes.putInt(start, 0, i); |
| Bytes.putInt(end, 0, i + 1); |
| RegionInfo hri = RegionInfoBuilder.newBuilder(tableName) |
| .setStartKey(start) |
| .setEndKey(end) |
| .setSplit(false) |
| .setRegionId(i) |
| .build(); |
| regions.add(hri); |
| regionServerMap.put(hri, null); |
| } |
| |
| // servers |
| servers = new ArrayList<>(numServers); |
| Map<ServerName, List<RegionInfo>> serverRegionMap = new HashMap<>(numServers); |
| for (int i = 0; i < numServers; ++i) { |
| ServerName sn = ServerName.valueOf("srv" + i, HConstants.DEFAULT_REGIONSERVER_PORT, i); |
| servers.add(sn); |
| serverRegionMap.put(sn, i == 0 ? regions : Collections.emptyList()); |
| } |
| tableServerRegionMap = Collections.singletonMap(tableName, serverRegionMap); |
| } |
| |
| @Override |
| protected void addOptions() { |
| addOption(NUM_REGIONS_OPT); |
| addOption(NUM_SERVERS_OPT); |
| addOption(LOAD_BALANCER_OPT); |
| } |
| |
| @Override |
| protected void processOptions(CommandLine cmd) { |
| numRegions = getOptionAsInt(cmd, NUM_REGIONS_OPT.getOpt(), DEFAULT_NUM_REGIONS); |
| Preconditions.checkArgument(numRegions > 0, "Invalid number of regions!"); |
| |
| numServers = getOptionAsInt(cmd, NUM_SERVERS_OPT.getOpt(), DEFAULT_NUM_SERVERS); |
| Preconditions.checkArgument(numServers > 0, "Invalid number of servers!"); |
| |
| loadBalancerType = cmd.getOptionValue(LOAD_BALANCER_OPT.getOpt(), DEFAULT_LOAD_BALANCER); |
| Preconditions.checkArgument(!loadBalancerType.isEmpty(), "Invalid load balancer type!"); |
| |
| try { |
| loadBalancerClazz = Class.forName(loadBalancerType); |
| } catch (ClassNotFoundException e) { |
| System.err.println("Class '" + loadBalancerType + "' not found!"); |
| System.exit(1); |
| } |
| |
| setupConf(); |
| } |
| |
| private String formatResults(final String methodName, final long timeMillis) { |
| return String.format("Time for %-25s: %dms%n", methodName, timeMillis); |
| } |
| |
| @Override |
| protected int doWork() throws Exception { |
| generateRegionsAndServers(); |
| |
| String methodName = "roundRobinAssignment"; |
| LOG.info("Calling " + methodName); |
| Stopwatch watch = Stopwatch.createStarted(); |
| loadBalancer.roundRobinAssignment(regions, servers); |
| System.out.print(formatResults(methodName, watch.elapsed(TimeUnit.MILLISECONDS))); |
| |
| methodName = "retainAssignment"; |
| LOG.info("Calling " + methodName); |
| watch.reset().start(); |
| loadBalancer.retainAssignment(regionServerMap, servers); |
| System.out.print(formatResults(methodName, watch.elapsed(TimeUnit.MILLISECONDS))); |
| |
| methodName = "balanceCluster"; |
| LOG.info("Calling " + methodName); |
| watch.reset().start(); |
| |
| loadBalancer.balanceCluster(tableServerRegionMap); |
| System.out.print(formatResults(methodName, watch.elapsed(TimeUnit.MILLISECONDS))); |
| |
| return EXIT_SUCCESS; |
| } |
| |
| public static void main(String[] args) throws IOException { |
| LoadBalancerPerformanceEvaluation tool = new LoadBalancerPerformanceEvaluation(); |
| tool.setConf(UTIL.getConfiguration()); |
| tool.run(args); |
| } |
| } |