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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.Iterator;<a name="line.25"></a> |
| <span class="sourceLineNo">026</span>import java.util.List;<a name="line.26"></a> |
| <span class="sourceLineNo">027</span>import java.util.Map;<a name="line.27"></a> |
| <span class="sourceLineNo">028</span>import java.util.Map.Entry;<a name="line.28"></a> |
| <span class="sourceLineNo">029</span>import java.util.TreeMap;<a name="line.29"></a> |
| <span class="sourceLineNo">030</span>import org.apache.hadoop.conf.Configuration;<a name="line.30"></a> |
| <span class="sourceLineNo">031</span>import org.apache.hadoop.hbase.HBaseClassTestRule;<a name="line.31"></a> |
| <span class="sourceLineNo">032</span>import org.apache.hadoop.hbase.HBaseConfiguration;<a name="line.32"></a> |
| <span class="sourceLineNo">033</span>import org.apache.hadoop.hbase.HConstants;<a name="line.33"></a> |
| <span class="sourceLineNo">034</span>import org.apache.hadoop.hbase.ServerName;<a name="line.34"></a> |
| <span class="sourceLineNo">035</span>import org.apache.hadoop.hbase.client.RegionInfo;<a name="line.35"></a> |
| <span class="sourceLineNo">036</span>import org.apache.hadoop.hbase.client.RegionReplicaUtil;<a name="line.36"></a> |
| <span class="sourceLineNo">037</span>import org.apache.hadoop.hbase.master.RackManager;<a name="line.37"></a> |
| <span class="sourceLineNo">038</span>import org.apache.hadoop.hbase.testclassification.LargeTests;<a name="line.38"></a> |
| <span class="sourceLineNo">039</span>import org.apache.hadoop.hbase.testclassification.MasterTests;<a name="line.39"></a> |
| <span class="sourceLineNo">040</span>import org.junit.ClassRule;<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><a name="line.43"></a> |
| <span class="sourceLineNo">044</span>@Category({ MasterTests.class, LargeTests.class })<a name="line.44"></a> |
| <span class="sourceLineNo">045</span>public class TestStochasticLoadBalancerRegionReplica extends BalancerTestBase {<a name="line.45"></a> |
| <span class="sourceLineNo">046</span><a name="line.46"></a> |
| <span class="sourceLineNo">047</span> @ClassRule<a name="line.47"></a> |
| <span class="sourceLineNo">048</span> public static final HBaseClassTestRule CLASS_RULE =<a name="line.48"></a> |
| <span class="sourceLineNo">049</span> HBaseClassTestRule.forClass(TestStochasticLoadBalancerRegionReplica.class);<a name="line.49"></a> |
| <span class="sourceLineNo">050</span><a name="line.50"></a> |
| <span class="sourceLineNo">051</span> @Test<a name="line.51"></a> |
| <span class="sourceLineNo">052</span> public void testReplicaCost() {<a name="line.52"></a> |
| <span class="sourceLineNo">053</span> Configuration conf = HBaseConfiguration.create();<a name="line.53"></a> |
| <span class="sourceLineNo">054</span> StochasticLoadBalancer.CostFunction costFunction =<a name="line.54"></a> |
| <span class="sourceLineNo">055</span> new StochasticLoadBalancer.RegionReplicaHostCostFunction(conf);<a name="line.55"></a> |
| <span class="sourceLineNo">056</span> for (int[] mockCluster : clusterStateMocks) {<a name="line.56"></a> |
| <span class="sourceLineNo">057</span> BalancerClusterState cluster = mockCluster(mockCluster);<a name="line.57"></a> |
| <span class="sourceLineNo">058</span> costFunction.init(cluster);<a name="line.58"></a> |
| <span class="sourceLineNo">059</span> double cost = costFunction.cost();<a name="line.59"></a> |
| <span class="sourceLineNo">060</span> assertTrue(cost >= 0);<a name="line.60"></a> |
| <span class="sourceLineNo">061</span> assertTrue(cost <= 1.01);<a name="line.61"></a> |
| <span class="sourceLineNo">062</span> }<a name="line.62"></a> |
| <span class="sourceLineNo">063</span> }<a name="line.63"></a> |
| <span class="sourceLineNo">064</span><a name="line.64"></a> |
| <span class="sourceLineNo">065</span> @Test<a name="line.65"></a> |
| <span class="sourceLineNo">066</span> public void testReplicaCostForReplicas() {<a name="line.66"></a> |
| <span class="sourceLineNo">067</span> Configuration conf = HBaseConfiguration.create();<a name="line.67"></a> |
| <span class="sourceLineNo">068</span> StochasticLoadBalancer.CostFunction costFunction =<a name="line.68"></a> |
| <span class="sourceLineNo">069</span> new StochasticLoadBalancer.RegionReplicaHostCostFunction(conf);<a name="line.69"></a> |
| <span class="sourceLineNo">070</span><a name="line.70"></a> |
| <span class="sourceLineNo">071</span> int[] servers = new int[] { 3, 3, 3, 3, 3 };<a name="line.71"></a> |
| <span class="sourceLineNo">072</span> TreeMap<ServerName, List<RegionInfo>> clusterState = mockClusterServers(servers);<a name="line.72"></a> |
| <span class="sourceLineNo">073</span><a name="line.73"></a> |
| <span class="sourceLineNo">074</span> BalancerClusterState cluster;<a name="line.74"></a> |
| <span class="sourceLineNo">075</span><a name="line.75"></a> |
| <span class="sourceLineNo">076</span> cluster = new BalancerClusterState(clusterState, null, null, null);<a name="line.76"></a> |
| <span class="sourceLineNo">077</span> costFunction.init(cluster);<a name="line.77"></a> |
| <span class="sourceLineNo">078</span> double costWithoutReplicas = costFunction.cost();<a name="line.78"></a> |
| <span class="sourceLineNo">079</span> assertEquals(0, costWithoutReplicas, 0);<a name="line.79"></a> |
| <span class="sourceLineNo">080</span><a name="line.80"></a> |
| <span class="sourceLineNo">081</span> // replicate the region from first server to the last server<a name="line.81"></a> |
| <span class="sourceLineNo">082</span> RegionInfo replica1 =<a name="line.82"></a> |
| <span class="sourceLineNo">083</span> RegionReplicaUtil.getRegionInfoForReplica(clusterState.firstEntry().getValue().get(0), 1);<a name="line.83"></a> |
| <span class="sourceLineNo">084</span> clusterState.lastEntry().getValue().add(replica1);<a name="line.84"></a> |
| <span class="sourceLineNo">085</span><a name="line.85"></a> |
| <span class="sourceLineNo">086</span> cluster = new BalancerClusterState(clusterState, null, null, null);<a name="line.86"></a> |
| <span class="sourceLineNo">087</span> costFunction.init(cluster);<a name="line.87"></a> |
| <span class="sourceLineNo">088</span> double costWith1ReplicaDifferentServer = costFunction.cost();<a name="line.88"></a> |
| <span class="sourceLineNo">089</span><a name="line.89"></a> |
| <span class="sourceLineNo">090</span> assertEquals(0, costWith1ReplicaDifferentServer, 0);<a name="line.90"></a> |
| <span class="sourceLineNo">091</span><a name="line.91"></a> |
| <span class="sourceLineNo">092</span> // add a third replica to the last server<a name="line.92"></a> |
| <span class="sourceLineNo">093</span> RegionInfo replica2 = RegionReplicaUtil.getRegionInfoForReplica(replica1, 2);<a name="line.93"></a> |
| <span class="sourceLineNo">094</span> clusterState.lastEntry().getValue().add(replica2);<a name="line.94"></a> |
| <span class="sourceLineNo">095</span><a name="line.95"></a> |
| <span class="sourceLineNo">096</span> cluster = new BalancerClusterState(clusterState, null, null, null);<a name="line.96"></a> |
| <span class="sourceLineNo">097</span> costFunction.init(cluster);<a name="line.97"></a> |
| <span class="sourceLineNo">098</span> double costWith1ReplicaSameServer = costFunction.cost();<a name="line.98"></a> |
| <span class="sourceLineNo">099</span><a name="line.99"></a> |
| <span class="sourceLineNo">100</span> assertTrue(costWith1ReplicaDifferentServer < costWith1ReplicaSameServer);<a name="line.100"></a> |
| <span class="sourceLineNo">101</span><a name="line.101"></a> |
| <span class="sourceLineNo">102</span> // test with replication = 4 for following:<a name="line.102"></a> |
| <span class="sourceLineNo">103</span><a name="line.103"></a> |
| <span class="sourceLineNo">104</span> RegionInfo replica3;<a name="line.104"></a> |
| <span class="sourceLineNo">105</span> Iterator<Entry<ServerName, List<RegionInfo>>> it;<a name="line.105"></a> |
| <span class="sourceLineNo">106</span> Entry<ServerName, List<RegionInfo>> entry;<a name="line.106"></a> |
| <span class="sourceLineNo">107</span><a name="line.107"></a> |
| <span class="sourceLineNo">108</span> clusterState = mockClusterServers(servers);<a name="line.108"></a> |
| <span class="sourceLineNo">109</span> it = clusterState.entrySet().iterator();<a name="line.109"></a> |
| <span class="sourceLineNo">110</span> entry = it.next(); // first server<a name="line.110"></a> |
| <span class="sourceLineNo">111</span> RegionInfo hri = entry.getValue().get(0);<a name="line.111"></a> |
| <span class="sourceLineNo">112</span> replica1 = RegionReplicaUtil.getRegionInfoForReplica(hri, 1);<a name="line.112"></a> |
| <span class="sourceLineNo">113</span> replica2 = RegionReplicaUtil.getRegionInfoForReplica(hri, 2);<a name="line.113"></a> |
| <span class="sourceLineNo">114</span> replica3 = RegionReplicaUtil.getRegionInfoForReplica(hri, 3);<a name="line.114"></a> |
| <span class="sourceLineNo">115</span> entry.getValue().add(replica1);<a name="line.115"></a> |
| <span class="sourceLineNo">116</span> entry.getValue().add(replica2);<a name="line.116"></a> |
| <span class="sourceLineNo">117</span> it.next().getValue().add(replica3); // 2nd server<a name="line.117"></a> |
| <span class="sourceLineNo">118</span><a name="line.118"></a> |
| <span class="sourceLineNo">119</span> cluster = new BalancerClusterState(clusterState, null, null, null);<a name="line.119"></a> |
| <span class="sourceLineNo">120</span> costFunction.init(cluster);<a name="line.120"></a> |
| <span class="sourceLineNo">121</span> double costWith3ReplicasSameServer = costFunction.cost();<a name="line.121"></a> |
| <span class="sourceLineNo">122</span><a name="line.122"></a> |
| <span class="sourceLineNo">123</span> clusterState = mockClusterServers(servers);<a name="line.123"></a> |
| <span class="sourceLineNo">124</span> hri = clusterState.firstEntry().getValue().get(0);<a name="line.124"></a> |
| <span class="sourceLineNo">125</span> replica1 = RegionReplicaUtil.getRegionInfoForReplica(hri, 1);<a name="line.125"></a> |
| <span class="sourceLineNo">126</span> replica2 = RegionReplicaUtil.getRegionInfoForReplica(hri, 2);<a name="line.126"></a> |
| <span class="sourceLineNo">127</span> replica3 = RegionReplicaUtil.getRegionInfoForReplica(hri, 3);<a name="line.127"></a> |
| <span class="sourceLineNo">128</span><a name="line.128"></a> |
| <span class="sourceLineNo">129</span> clusterState.firstEntry().getValue().add(replica1);<a name="line.129"></a> |
| <span class="sourceLineNo">130</span> clusterState.lastEntry().getValue().add(replica2);<a name="line.130"></a> |
| <span class="sourceLineNo">131</span> clusterState.lastEntry().getValue().add(replica3);<a name="line.131"></a> |
| <span class="sourceLineNo">132</span><a name="line.132"></a> |
| <span class="sourceLineNo">133</span> cluster = new BalancerClusterState(clusterState, null, null, null);<a name="line.133"></a> |
| <span class="sourceLineNo">134</span> costFunction.init(cluster);<a name="line.134"></a> |
| <span class="sourceLineNo">135</span> double costWith2ReplicasOnTwoServers = costFunction.cost();<a name="line.135"></a> |
| <span class="sourceLineNo">136</span><a name="line.136"></a> |
| <span class="sourceLineNo">137</span> assertTrue(costWith2ReplicasOnTwoServers < costWith3ReplicasSameServer);<a name="line.137"></a> |
| <span class="sourceLineNo">138</span> }<a name="line.138"></a> |
| <span class="sourceLineNo">139</span><a name="line.139"></a> |
| <span class="sourceLineNo">140</span> @Test<a name="line.140"></a> |
| <span class="sourceLineNo">141</span> public void testNeedsBalanceForColocatedReplicas() {<a name="line.141"></a> |
| <span class="sourceLineNo">142</span> // check for the case where there are two hosts and with one rack, and where<a name="line.142"></a> |
| <span class="sourceLineNo">143</span> // both the replicas are hosted on the same server<a name="line.143"></a> |
| <span class="sourceLineNo">144</span> List<RegionInfo> regions = randomRegions(1);<a name="line.144"></a> |
| <span class="sourceLineNo">145</span> ServerName s1 = ServerName.valueOf("host1", 1000, 11111);<a name="line.145"></a> |
| <span class="sourceLineNo">146</span> ServerName s2 = ServerName.valueOf("host11", 1000, 11111);<a name="line.146"></a> |
| <span class="sourceLineNo">147</span> Map<ServerName, List<RegionInfo>> map = new HashMap<>();<a name="line.147"></a> |
| <span class="sourceLineNo">148</span> map.put(s1, regions);<a name="line.148"></a> |
| <span class="sourceLineNo">149</span> regions.add(RegionReplicaUtil.getRegionInfoForReplica(regions.get(0), 1));<a name="line.149"></a> |
| <span class="sourceLineNo">150</span> // until the step above s1 holds two replicas of a region<a name="line.150"></a> |
| <span class="sourceLineNo">151</span> regions = randomRegions(1);<a name="line.151"></a> |
| <span class="sourceLineNo">152</span> map.put(s2, regions);<a name="line.152"></a> |
| <span class="sourceLineNo">153</span> assertTrue(loadBalancer.needsBalance(HConstants.ENSEMBLE_TABLE_NAME,<a name="line.153"></a> |
| <span class="sourceLineNo">154</span> new BalancerClusterState(map, null, null, null)));<a name="line.154"></a> |
| <span class="sourceLineNo">155</span> // check for the case where there are two hosts on the same rack and there are two racks<a name="line.155"></a> |
| <span class="sourceLineNo">156</span> // and both the replicas are on the same rack<a name="line.156"></a> |
| <span class="sourceLineNo">157</span> map.clear();<a name="line.157"></a> |
| <span class="sourceLineNo">158</span> regions = randomRegions(1);<a name="line.158"></a> |
| <span class="sourceLineNo">159</span> List<RegionInfo> regionsOnS2 = new ArrayList<>(1);<a name="line.159"></a> |
| <span class="sourceLineNo">160</span> regionsOnS2.add(RegionReplicaUtil.getRegionInfoForReplica(regions.get(0), 1));<a name="line.160"></a> |
| <span class="sourceLineNo">161</span> map.put(s1, regions);<a name="line.161"></a> |
| <span class="sourceLineNo">162</span> map.put(s2, regionsOnS2);<a name="line.162"></a> |
| <span class="sourceLineNo">163</span> // add another server so that the cluster has some host on another rack<a name="line.163"></a> |
| <span class="sourceLineNo">164</span> map.put(ServerName.valueOf("host2", 1000, 11111), randomRegions(1));<a name="line.164"></a> |
| <span class="sourceLineNo">165</span> assertTrue(<a name="line.165"></a> |
| <span class="sourceLineNo">166</span> loadBalancer.needsBalance(HConstants.ENSEMBLE_TABLE_NAME,<a name="line.166"></a> |
| <span class="sourceLineNo">167</span> new BalancerClusterState(map, null, null, new ForTestRackManagerOne())));<a name="line.167"></a> |
| <span class="sourceLineNo">168</span> }<a name="line.168"></a> |
| <span class="sourceLineNo">169</span><a name="line.169"></a> |
| <span class="sourceLineNo">170</span> @Test<a name="line.170"></a> |
| <span class="sourceLineNo">171</span> public void testRegionReplicasOnSmallCluster() {<a name="line.171"></a> |
| <span class="sourceLineNo">172</span> int numNodes = 10;<a name="line.172"></a> |
| <span class="sourceLineNo">173</span> int numRegions = 1000;<a name="line.173"></a> |
| <span class="sourceLineNo">174</span> int replication = 3; // 3 replicas per region<a name="line.174"></a> |
| <span class="sourceLineNo">175</span> int numRegionsPerServer = 80; // all regions are mostly balanced<a name="line.175"></a> |
| <span class="sourceLineNo">176</span> int numTables = 10;<a name="line.176"></a> |
| <span class="sourceLineNo">177</span> testWithCluster(numNodes, numRegions, numRegionsPerServer, replication, numTables, true, true);<a name="line.177"></a> |
| <span class="sourceLineNo">178</span> }<a name="line.178"></a> |
| <span class="sourceLineNo">179</span><a name="line.179"></a> |
| <span class="sourceLineNo">180</span> private static class ForTestRackManagerOne extends RackManager {<a name="line.180"></a> |
| <span class="sourceLineNo">181</span> @Override<a name="line.181"></a> |
| <span class="sourceLineNo">182</span> public String getRack(ServerName server) {<a name="line.182"></a> |
| <span class="sourceLineNo">183</span> return server.getHostname().endsWith("1") ? "rack1" : "rack2";<a name="line.183"></a> |
| <span class="sourceLineNo">184</span> }<a name="line.184"></a> |
| <span class="sourceLineNo">185</span> }<a name="line.185"></a> |
| <span class="sourceLineNo">186</span>}<a name="line.186"></a> |
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