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| <pre><span class="sourceLineNo">001</span>/*<a name="line.1"></a> |
| <span class="sourceLineNo">002</span> * Licensed to the Apache Software Foundation (ASF) under one<a name="line.2"></a> |
| <span class="sourceLineNo">003</span> * or more contributor license agreements. See the NOTICE file<a name="line.3"></a> |
| <span class="sourceLineNo">004</span> * distributed with this work for additional information<a name="line.4"></a> |
| <span class="sourceLineNo">005</span> * regarding copyright ownership. The ASF licenses this file<a name="line.5"></a> |
| <span class="sourceLineNo">006</span> * to you under the Apache License, Version 2.0 (the<a name="line.6"></a> |
| <span class="sourceLineNo">007</span> * "License"); you may not use this file except in compliance<a name="line.7"></a> |
| <span class="sourceLineNo">008</span> * with the License. You may obtain a copy of the License at<a name="line.8"></a> |
| <span class="sourceLineNo">009</span> *<a name="line.9"></a> |
| <span class="sourceLineNo">010</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.10"></a> |
| <span class="sourceLineNo">011</span> *<a name="line.11"></a> |
| <span class="sourceLineNo">012</span> * Unless required by applicable law or agreed to in writing, software<a name="line.12"></a> |
| <span class="sourceLineNo">013</span> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.13"></a> |
| <span class="sourceLineNo">014</span> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.14"></a> |
| <span class="sourceLineNo">015</span> * See the License for the specific language governing permissions and<a name="line.15"></a> |
| <span class="sourceLineNo">016</span> * limitations under the License.<a name="line.16"></a> |
| <span class="sourceLineNo">017</span> */<a name="line.17"></a> |
| <span class="sourceLineNo">018</span>package org.apache.hadoop.hbase.master.balancer;<a name="line.18"></a> |
| <span class="sourceLineNo">019</span><a name="line.19"></a> |
| <span class="sourceLineNo">020</span>import static org.junit.Assert.assertEquals;<a name="line.20"></a> |
| <span class="sourceLineNo">021</span>import static org.junit.Assert.assertTrue;<a name="line.21"></a> |
| <span class="sourceLineNo">022</span><a name="line.22"></a> |
| <span class="sourceLineNo">023</span>import java.util.ArrayList;<a name="line.23"></a> |
| <span class="sourceLineNo">024</span>import java.util.HashMap;<a name="line.24"></a> |
| <span class="sourceLineNo">025</span>import java.util.List;<a name="line.25"></a> |
| <span class="sourceLineNo">026</span>import java.util.Map;<a name="line.26"></a> |
| <span class="sourceLineNo">027</span>import java.util.TreeMap;<a name="line.27"></a> |
| <span class="sourceLineNo">028</span>import org.apache.hadoop.conf.Configuration;<a name="line.28"></a> |
| <span class="sourceLineNo">029</span>import org.apache.hadoop.hbase.HBaseClassTestRule;<a name="line.29"></a> |
| <span class="sourceLineNo">030</span>import org.apache.hadoop.hbase.HBaseConfiguration;<a name="line.30"></a> |
| <span class="sourceLineNo">031</span>import org.apache.hadoop.hbase.ServerName;<a name="line.31"></a> |
| <span class="sourceLineNo">032</span>import org.apache.hadoop.hbase.TableName;<a name="line.32"></a> |
| <span class="sourceLineNo">033</span>import org.apache.hadoop.hbase.client.RegionInfo;<a name="line.33"></a> |
| <span class="sourceLineNo">034</span>import org.apache.hadoop.hbase.master.RegionPlan;<a name="line.34"></a> |
| <span class="sourceLineNo">035</span>import org.apache.hadoop.hbase.testclassification.MasterTests;<a name="line.35"></a> |
| <span class="sourceLineNo">036</span>import org.apache.hadoop.hbase.testclassification.SmallTests;<a name="line.36"></a> |
| <span class="sourceLineNo">037</span>import org.apache.hadoop.net.DNSToSwitchMapping;<a name="line.37"></a> |
| <span class="sourceLineNo">038</span>import org.junit.BeforeClass;<a name="line.38"></a> |
| <span class="sourceLineNo">039</span>import org.junit.ClassRule;<a name="line.39"></a> |
| <span class="sourceLineNo">040</span>import org.junit.Rule;<a name="line.40"></a> |
| <span class="sourceLineNo">041</span>import org.junit.Test;<a name="line.41"></a> |
| <span class="sourceLineNo">042</span>import org.junit.experimental.categories.Category;<a name="line.42"></a> |
| <span class="sourceLineNo">043</span>import org.junit.rules.TestName;<a name="line.43"></a> |
| <span class="sourceLineNo">044</span>import org.slf4j.Logger;<a name="line.44"></a> |
| <span class="sourceLineNo">045</span>import org.slf4j.LoggerFactory;<a name="line.45"></a> |
| <span class="sourceLineNo">046</span><a name="line.46"></a> |
| <span class="sourceLineNo">047</span>/**<a name="line.47"></a> |
| <span class="sourceLineNo">048</span> * Test the load balancer that is created by default.<a name="line.48"></a> |
| <span class="sourceLineNo">049</span> */<a name="line.49"></a> |
| <span class="sourceLineNo">050</span>@Category({ MasterTests.class, SmallTests.class })<a name="line.50"></a> |
| <span class="sourceLineNo">051</span>public class TestSimpleLoadBalancer extends BalancerTestBase {<a name="line.51"></a> |
| <span class="sourceLineNo">052</span><a name="line.52"></a> |
| <span class="sourceLineNo">053</span> @ClassRule<a name="line.53"></a> |
| <span class="sourceLineNo">054</span> public static final HBaseClassTestRule CLASS_RULE =<a name="line.54"></a> |
| <span class="sourceLineNo">055</span> HBaseClassTestRule.forClass(TestSimpleLoadBalancer.class);<a name="line.55"></a> |
| <span class="sourceLineNo">056</span><a name="line.56"></a> |
| <span class="sourceLineNo">057</span> private static final Logger LOG = LoggerFactory.getLogger(TestSimpleLoadBalancer.class);<a name="line.57"></a> |
| <span class="sourceLineNo">058</span><a name="line.58"></a> |
| <span class="sourceLineNo">059</span> private static SimpleLoadBalancer loadBalancer;<a name="line.59"></a> |
| <span class="sourceLineNo">060</span><a name="line.60"></a> |
| <span class="sourceLineNo">061</span> @BeforeClass<a name="line.61"></a> |
| <span class="sourceLineNo">062</span> public static void beforeAllTests() throws Exception {<a name="line.62"></a> |
| <span class="sourceLineNo">063</span> Configuration conf = HBaseConfiguration.create();<a name="line.63"></a> |
| <span class="sourceLineNo">064</span> conf.setClass("hbase.util.ip.to.rack.determiner", MockMapping.class, DNSToSwitchMapping.class);<a name="line.64"></a> |
| <span class="sourceLineNo">065</span> conf.set("hbase.regions.slop", "0");<a name="line.65"></a> |
| <span class="sourceLineNo">066</span> loadBalancer = new SimpleLoadBalancer();<a name="line.66"></a> |
| <span class="sourceLineNo">067</span> loadBalancer.setClusterInfoProvider(new DummyClusterInfoProvider(conf));<a name="line.67"></a> |
| <span class="sourceLineNo">068</span> loadBalancer.initialize();<a name="line.68"></a> |
| <span class="sourceLineNo">069</span> }<a name="line.69"></a> |
| <span class="sourceLineNo">070</span><a name="line.70"></a> |
| <span class="sourceLineNo">071</span> int[] mockUniformCluster = new int[] { 5, 5, 5, 5, 5, 0 };<a name="line.71"></a> |
| <span class="sourceLineNo">072</span><a name="line.72"></a> |
| <span class="sourceLineNo">073</span> @Rule<a name="line.73"></a> |
| <span class="sourceLineNo">074</span> public TestName name = new TestName();<a name="line.74"></a> |
| <span class="sourceLineNo">075</span><a name="line.75"></a> |
| <span class="sourceLineNo">076</span> /**<a name="line.76"></a> |
| <span class="sourceLineNo">077</span> * Test the load balancing algorithm. Invariant is that all servers should be hosting either<a name="line.77"></a> |
| <span class="sourceLineNo">078</span> * floor(average) or ceiling(average) at both table level and cluster level<a name="line.78"></a> |
| <span class="sourceLineNo">079</span> */<a name="line.79"></a> |
| <span class="sourceLineNo">080</span> @Test<a name="line.80"></a> |
| <span class="sourceLineNo">081</span> public void testBalanceClusterOverall() throws Exception {<a name="line.81"></a> |
| <span class="sourceLineNo">082</span> Map<TableName, Map<ServerName, List<RegionInfo>>> clusterLoad = new TreeMap<>();<a name="line.82"></a> |
| <span class="sourceLineNo">083</span> for (int[] mockCluster : clusterStateMocks) {<a name="line.83"></a> |
| <span class="sourceLineNo">084</span> Map<ServerName, List<RegionInfo>> clusterServers = mockClusterServers(mockCluster, 30);<a name="line.84"></a> |
| <span class="sourceLineNo">085</span> List<ServerAndLoad> clusterList = convertToList(clusterServers);<a name="line.85"></a> |
| <span class="sourceLineNo">086</span> clusterLoad.put(TableName.valueOf(name.getMethodName()), clusterServers);<a name="line.86"></a> |
| <span class="sourceLineNo">087</span> HashMap<TableName, TreeMap<ServerName, List<RegionInfo>>> result =<a name="line.87"></a> |
| <span class="sourceLineNo">088</span> mockClusterServersWithTables(clusterServers);<a name="line.88"></a> |
| <span class="sourceLineNo">089</span> loadBalancer.setClusterLoad(clusterLoad);<a name="line.89"></a> |
| <span class="sourceLineNo">090</span> List<RegionPlan> clusterplans = new ArrayList<>();<a name="line.90"></a> |
| <span class="sourceLineNo">091</span> for (Map.Entry<TableName, TreeMap<ServerName, List<RegionInfo>>> mapEntry : result<a name="line.91"></a> |
| <span class="sourceLineNo">092</span> .entrySet()) {<a name="line.92"></a> |
| <span class="sourceLineNo">093</span> TableName tableName = mapEntry.getKey();<a name="line.93"></a> |
| <span class="sourceLineNo">094</span> TreeMap<ServerName, List<RegionInfo>> servers = mapEntry.getValue();<a name="line.94"></a> |
| <span class="sourceLineNo">095</span> List<ServerAndLoad> list = convertToList(servers);<a name="line.95"></a> |
| <span class="sourceLineNo">096</span> LOG.info("Mock Cluster : " + printMock(list) + " " + printStats(list));<a name="line.96"></a> |
| <span class="sourceLineNo">097</span> List<RegionPlan> partialplans = loadBalancer.balanceTable(tableName, servers);<a name="line.97"></a> |
| <span class="sourceLineNo">098</span> if (partialplans != null) clusterplans.addAll(partialplans);<a name="line.98"></a> |
| <span class="sourceLineNo">099</span> List<ServerAndLoad> balancedClusterPerTable = reconcile(list, partialplans, servers);<a name="line.99"></a> |
| <span class="sourceLineNo">100</span> LOG.info("Mock Balance : " + printMock(balancedClusterPerTable));<a name="line.100"></a> |
| <span class="sourceLineNo">101</span> assertClusterAsBalanced(balancedClusterPerTable);<a name="line.101"></a> |
| <span class="sourceLineNo">102</span> for (Map.Entry<ServerName, List<RegionInfo>> entry : servers.entrySet()) {<a name="line.102"></a> |
| <span class="sourceLineNo">103</span> returnRegions(entry.getValue());<a name="line.103"></a> |
| <span class="sourceLineNo">104</span> returnServer(entry.getKey());<a name="line.104"></a> |
| <span class="sourceLineNo">105</span> }<a name="line.105"></a> |
| <span class="sourceLineNo">106</span> }<a name="line.106"></a> |
| <span class="sourceLineNo">107</span> List<ServerAndLoad> balancedCluster = reconcile(clusterList, clusterplans, clusterServers);<a name="line.107"></a> |
| <span class="sourceLineNo">108</span> assertTrue(assertClusterOverallAsBalanced(balancedCluster, result.keySet().size()));<a name="line.108"></a> |
| <span class="sourceLineNo">109</span> }<a name="line.109"></a> |
| <span class="sourceLineNo">110</span> }<a name="line.110"></a> |
| <span class="sourceLineNo">111</span><a name="line.111"></a> |
| <span class="sourceLineNo">112</span> /**<a name="line.112"></a> |
| <span class="sourceLineNo">113</span> * Test the load balancing algorithm. Invariant is that all servers should be hosting either<a name="line.113"></a> |
| <span class="sourceLineNo">114</span> * floor(average) or ceiling(average) at both table level and cluster level Deliberately generate<a name="line.114"></a> |
| <span class="sourceLineNo">115</span> * a special case to show the overall strategy can achieve cluster level balance while the bytable<a name="line.115"></a> |
| <span class="sourceLineNo">116</span> * strategy cannot<a name="line.116"></a> |
| <span class="sourceLineNo">117</span> */<a name="line.117"></a> |
| <span class="sourceLineNo">118</span> @Test<a name="line.118"></a> |
| <span class="sourceLineNo">119</span> public void testImpactOfBalanceClusterOverall() throws Exception {<a name="line.119"></a> |
| <span class="sourceLineNo">120</span> testImpactOfBalanceClusterOverall(false);<a name="line.120"></a> |
| <span class="sourceLineNo">121</span> }<a name="line.121"></a> |
| <span class="sourceLineNo">122</span><a name="line.122"></a> |
| <span class="sourceLineNo">123</span> @Test<a name="line.123"></a> |
| <span class="sourceLineNo">124</span> public void testImpactOfBalanceClusterOverallWithLoadOfAllTable() throws Exception {<a name="line.124"></a> |
| <span class="sourceLineNo">125</span> testImpactOfBalanceClusterOverall(true);<a name="line.125"></a> |
| <span class="sourceLineNo">126</span> }<a name="line.126"></a> |
| <span class="sourceLineNo">127</span><a name="line.127"></a> |
| <span class="sourceLineNo">128</span> private void testImpactOfBalanceClusterOverall(boolean useLoadOfAllTable) throws Exception {<a name="line.128"></a> |
| <span class="sourceLineNo">129</span> Map<TableName, Map<ServerName, List<RegionInfo>>> clusterLoad = new TreeMap<>();<a name="line.129"></a> |
| <span class="sourceLineNo">130</span> Map<ServerName, List<RegionInfo>> clusterServers =<a name="line.130"></a> |
| <span class="sourceLineNo">131</span> mockUniformClusterServers(mockUniformCluster);<a name="line.131"></a> |
| <span class="sourceLineNo">132</span> List<ServerAndLoad> clusterList = convertToList(clusterServers);<a name="line.132"></a> |
| <span class="sourceLineNo">133</span> clusterLoad.put(TableName.valueOf(name.getMethodName()), clusterServers);<a name="line.133"></a> |
| <span class="sourceLineNo">134</span> // use overall can achieve both table and cluster level balance<a name="line.134"></a> |
| <span class="sourceLineNo">135</span> HashMap<TableName, TreeMap<ServerName, List<RegionInfo>>> LoadOfAllTable =<a name="line.135"></a> |
| <span class="sourceLineNo">136</span> mockClusterServersWithTables(clusterServers);<a name="line.136"></a> |
| <span class="sourceLineNo">137</span> if (useLoadOfAllTable) {<a name="line.137"></a> |
| <span class="sourceLineNo">138</span> loadBalancer.setClusterLoad((Map) LoadOfAllTable);<a name="line.138"></a> |
| <span class="sourceLineNo">139</span> } else {<a name="line.139"></a> |
| <span class="sourceLineNo">140</span> loadBalancer.setClusterLoad(clusterLoad);<a name="line.140"></a> |
| <span class="sourceLineNo">141</span> }<a name="line.141"></a> |
| <span class="sourceLineNo">142</span> List<RegionPlan> clusterplans1 = new ArrayList<RegionPlan>();<a name="line.142"></a> |
| <span class="sourceLineNo">143</span> for (Map.Entry<TableName, TreeMap<ServerName, List<RegionInfo>>> mapEntry : LoadOfAllTable<a name="line.143"></a> |
| <span class="sourceLineNo">144</span> .entrySet()) {<a name="line.144"></a> |
| <span class="sourceLineNo">145</span> TableName tableName = mapEntry.getKey();<a name="line.145"></a> |
| <span class="sourceLineNo">146</span> TreeMap<ServerName, List<RegionInfo>> servers = mapEntry.getValue();<a name="line.146"></a> |
| <span class="sourceLineNo">147</span> List<ServerAndLoad> list = convertToList(servers);<a name="line.147"></a> |
| <span class="sourceLineNo">148</span> LOG.info("Mock Cluster : " + printMock(list) + " " + printStats(list));<a name="line.148"></a> |
| <span class="sourceLineNo">149</span> List<RegionPlan> partialplans = loadBalancer.balanceTable(tableName, servers);<a name="line.149"></a> |
| <span class="sourceLineNo">150</span> if (partialplans != null) clusterplans1.addAll(partialplans);<a name="line.150"></a> |
| <span class="sourceLineNo">151</span> List<ServerAndLoad> balancedClusterPerTable = reconcile(list, partialplans, servers);<a name="line.151"></a> |
| <span class="sourceLineNo">152</span> LOG.info("Mock Balance : " + printMock(balancedClusterPerTable));<a name="line.152"></a> |
| <span class="sourceLineNo">153</span> assertClusterAsBalanced(balancedClusterPerTable);<a name="line.153"></a> |
| <span class="sourceLineNo">154</span> for (Map.Entry<ServerName, List<RegionInfo>> entry : servers.entrySet()) {<a name="line.154"></a> |
| <span class="sourceLineNo">155</span> returnRegions(entry.getValue());<a name="line.155"></a> |
| <span class="sourceLineNo">156</span> returnServer(entry.getKey());<a name="line.156"></a> |
| <span class="sourceLineNo">157</span> }<a name="line.157"></a> |
| <span class="sourceLineNo">158</span> }<a name="line.158"></a> |
| <span class="sourceLineNo">159</span> List<ServerAndLoad> balancedCluster1 = reconcile(clusterList, clusterplans1, clusterServers);<a name="line.159"></a> |
| <span class="sourceLineNo">160</span> assertTrue(assertClusterOverallAsBalanced(balancedCluster1, LoadOfAllTable.keySet().size()));<a name="line.160"></a> |
| <span class="sourceLineNo">161</span> }<a name="line.161"></a> |
| <span class="sourceLineNo">162</span><a name="line.162"></a> |
| <span class="sourceLineNo">163</span> @Test<a name="line.163"></a> |
| <span class="sourceLineNo">164</span> public void testBalanceClusterOverallStrictly() {<a name="line.164"></a> |
| <span class="sourceLineNo">165</span> int[][] regionsPerServerPerTable = new int[][] { new int[] { 3, 3, 4, 4, 4, 4, 5, 5, 5 },<a name="line.165"></a> |
| <span class="sourceLineNo">166</span> new int[] { 2, 2, 2, 2, 2, 2, 2, 2, 1 }, };<a name="line.166"></a> |
| <span class="sourceLineNo">167</span> TreeMap<ServerName, List<RegionInfo>> serverRegionInfo =<a name="line.167"></a> |
| <span class="sourceLineNo">168</span> mockClusterServers(regionsPerServerPerTable);<a name="line.168"></a> |
| <span class="sourceLineNo">169</span> List<ServerAndLoad> serverAndLoads = convertToList(serverRegionInfo);<a name="line.169"></a> |
| <span class="sourceLineNo">170</span> Map<TableName, TreeMap<ServerName, List<RegionInfo>>> loadOfAllTable =<a name="line.170"></a> |
| <span class="sourceLineNo">171</span> mockClusterServersWithTables(serverRegionInfo);<a name="line.171"></a> |
| <span class="sourceLineNo">172</span> loadBalancer.setClusterLoad((Map) loadOfAllTable);<a name="line.172"></a> |
| <span class="sourceLineNo">173</span> List<RegionPlan> partialplans = loadBalancer.balanceTable(TableName.valueOf("table0"),<a name="line.173"></a> |
| <span class="sourceLineNo">174</span> loadOfAllTable.get(TableName.valueOf("table0")));<a name="line.174"></a> |
| <span class="sourceLineNo">175</span> List<ServerAndLoad> balancedServerLoads =<a name="line.175"></a> |
| <span class="sourceLineNo">176</span> reconcile(serverAndLoads, partialplans, serverRegionInfo);<a name="line.176"></a> |
| <span class="sourceLineNo">177</span> for (ServerAndLoad serverAndLoad : balancedServerLoads) {<a name="line.177"></a> |
| <span class="sourceLineNo">178</span> assertEquals(6, serverAndLoad.getLoad());<a name="line.178"></a> |
| <span class="sourceLineNo">179</span> }<a name="line.179"></a> |
| <span class="sourceLineNo">180</span> }<a name="line.180"></a> |
| <span class="sourceLineNo">181</span><a name="line.181"></a> |
| <span class="sourceLineNo">182</span>}<a name="line.182"></a> |
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