| <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> |
| <html lang="en"> |
| <head> |
| <title>Source code</title> |
| <link rel="stylesheet" type="text/css" href="../../../../../../../stylesheet.css" title="Style"> |
| </head> |
| <body> |
| <div class="sourceContainer"> |
| <pre><span class="sourceLineNo">001</span>/**<a name="line.1"></a> |
| <span class="sourceLineNo">002</span> *<a name="line.2"></a> |
| <span class="sourceLineNo">003</span> * Licensed to the Apache Software Foundation (ASF) under one<a name="line.3"></a> |
| <span class="sourceLineNo">004</span> * or more contributor license agreements. See the NOTICE file<a name="line.4"></a> |
| <span class="sourceLineNo">005</span> * distributed with this work for additional information<a name="line.5"></a> |
| <span class="sourceLineNo">006</span> * regarding copyright ownership. The ASF licenses this file<a name="line.6"></a> |
| <span class="sourceLineNo">007</span> * to you under the Apache License, Version 2.0 (the<a name="line.7"></a> |
| <span class="sourceLineNo">008</span> * "License"); you may not use this file except in compliance<a name="line.8"></a> |
| <span class="sourceLineNo">009</span> * with the License. You may obtain a copy of the License at<a name="line.9"></a> |
| <span class="sourceLineNo">010</span> *<a name="line.10"></a> |
| <span class="sourceLineNo">011</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.11"></a> |
| <span class="sourceLineNo">012</span> *<a name="line.12"></a> |
| <span class="sourceLineNo">013</span> * Unless required by applicable law or agreed to in writing, software<a name="line.13"></a> |
| <span class="sourceLineNo">014</span> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.14"></a> |
| <span class="sourceLineNo">015</span> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.15"></a> |
| <span class="sourceLineNo">016</span> * See the License for the specific language governing permissions and<a name="line.16"></a> |
| <span class="sourceLineNo">017</span> * limitations under the License.<a name="line.17"></a> |
| <span class="sourceLineNo">018</span> */<a name="line.18"></a> |
| <span class="sourceLineNo">019</span>package org.apache.hadoop.hbase.master.balancer;<a name="line.19"></a> |
| <span class="sourceLineNo">020</span><a name="line.20"></a> |
| <span class="sourceLineNo">021</span>import edu.umd.cs.findbugs.annotations.NonNull;<a name="line.21"></a> |
| <span class="sourceLineNo">022</span>import java.io.IOException;<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.Arrays;<a name="line.24"></a> |
| <span class="sourceLineNo">025</span>import java.util.Collection;<a name="line.25"></a> |
| <span class="sourceLineNo">026</span>import java.util.Collections;<a name="line.26"></a> |
| <span class="sourceLineNo">027</span>import java.util.Comparator;<a name="line.27"></a> |
| <span class="sourceLineNo">028</span>import java.util.Deque;<a name="line.28"></a> |
| <span class="sourceLineNo">029</span>import java.util.HashMap;<a name="line.29"></a> |
| <span class="sourceLineNo">030</span>import java.util.Iterator;<a name="line.30"></a> |
| <span class="sourceLineNo">031</span>import java.util.List;<a name="line.31"></a> |
| <span class="sourceLineNo">032</span>import java.util.Map;<a name="line.32"></a> |
| <span class="sourceLineNo">033</span>import java.util.Map.Entry;<a name="line.33"></a> |
| <span class="sourceLineNo">034</span>import java.util.NavigableMap;<a name="line.34"></a> |
| <span class="sourceLineNo">035</span>import java.util.Random;<a name="line.35"></a> |
| <span class="sourceLineNo">036</span>import java.util.Set;<a name="line.36"></a> |
| <span class="sourceLineNo">037</span>import java.util.TreeMap;<a name="line.37"></a> |
| <span class="sourceLineNo">038</span>import java.util.function.Predicate;<a name="line.38"></a> |
| <span class="sourceLineNo">039</span>import java.util.stream.Collectors;<a name="line.39"></a> |
| <span class="sourceLineNo">040</span>import org.apache.commons.lang3.NotImplementedException;<a name="line.40"></a> |
| <span class="sourceLineNo">041</span>import org.apache.hadoop.conf.Configuration;<a name="line.41"></a> |
| <span class="sourceLineNo">042</span>import org.apache.hadoop.hbase.ClusterMetrics;<a name="line.42"></a> |
| <span class="sourceLineNo">043</span>import org.apache.hadoop.hbase.HBaseConfiguration;<a name="line.43"></a> |
| <span class="sourceLineNo">044</span>import org.apache.hadoop.hbase.HBaseIOException;<a name="line.44"></a> |
| <span class="sourceLineNo">045</span>import org.apache.hadoop.hbase.HConstants;<a name="line.45"></a> |
| <span class="sourceLineNo">046</span>import org.apache.hadoop.hbase.HDFSBlocksDistribution;<a name="line.46"></a> |
| <span class="sourceLineNo">047</span>import org.apache.hadoop.hbase.ServerMetrics;<a name="line.47"></a> |
| <span class="sourceLineNo">048</span>import org.apache.hadoop.hbase.ServerName;<a name="line.48"></a> |
| <span class="sourceLineNo">049</span>import org.apache.hadoop.hbase.TableName;<a name="line.49"></a> |
| <span class="sourceLineNo">050</span>import org.apache.hadoop.hbase.client.RegionInfo;<a name="line.50"></a> |
| <span class="sourceLineNo">051</span>import org.apache.hadoop.hbase.client.RegionReplicaUtil;<a name="line.51"></a> |
| <span class="sourceLineNo">052</span>import org.apache.hadoop.hbase.client.TableDescriptor;<a name="line.52"></a> |
| <span class="sourceLineNo">053</span>import org.apache.hadoop.hbase.master.LoadBalancer;<a name="line.53"></a> |
| <span class="sourceLineNo">054</span>import org.apache.hadoop.hbase.master.MasterServices;<a name="line.54"></a> |
| <span class="sourceLineNo">055</span>import org.apache.hadoop.hbase.master.RackManager;<a name="line.55"></a> |
| <span class="sourceLineNo">056</span>import org.apache.hadoop.hbase.master.RegionPlan;<a name="line.56"></a> |
| <span class="sourceLineNo">057</span>import org.apache.hadoop.hbase.master.balancer.BaseLoadBalancer.Cluster.Action.Type;<a name="line.57"></a> |
| <span class="sourceLineNo">058</span>import org.apache.hadoop.hbase.net.Address;<a name="line.58"></a> |
| <span class="sourceLineNo">059</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.59"></a> |
| <span class="sourceLineNo">060</span>import org.slf4j.Logger;<a name="line.60"></a> |
| <span class="sourceLineNo">061</span>import org.slf4j.LoggerFactory;<a name="line.61"></a> |
| <span class="sourceLineNo">062</span><a name="line.62"></a> |
| <span class="sourceLineNo">063</span>import org.apache.hbase.thirdparty.com.google.common.base.Joiner;<a name="line.63"></a> |
| <span class="sourceLineNo">064</span>import org.apache.hbase.thirdparty.com.google.common.collect.ArrayListMultimap;<a name="line.64"></a> |
| <span class="sourceLineNo">065</span>import org.apache.hbase.thirdparty.com.google.common.collect.Lists;<a name="line.65"></a> |
| <span class="sourceLineNo">066</span>import org.apache.hbase.thirdparty.com.google.common.collect.Sets;<a name="line.66"></a> |
| <span class="sourceLineNo">067</span><a name="line.67"></a> |
| <span class="sourceLineNo">068</span>/**<a name="line.68"></a> |
| <span class="sourceLineNo">069</span> * The base class for load balancers. It provides the the functions used to by<a name="line.69"></a> |
| <span class="sourceLineNo">070</span> * {@link org.apache.hadoop.hbase.master.assignment.AssignmentManager} to assign regions<a name="line.70"></a> |
| <span class="sourceLineNo">071</span> * in the edge cases. It doesn't provide an implementation of the<a name="line.71"></a> |
| <span class="sourceLineNo">072</span> * actual balancing algorithm.<a name="line.72"></a> |
| <span class="sourceLineNo">073</span> *<a name="line.73"></a> |
| <span class="sourceLineNo">074</span> */<a name="line.74"></a> |
| <span class="sourceLineNo">075</span>@InterfaceAudience.Private<a name="line.75"></a> |
| <span class="sourceLineNo">076</span>public abstract class BaseLoadBalancer implements LoadBalancer {<a name="line.76"></a> |
| <span class="sourceLineNo">077</span><a name="line.77"></a> |
| <span class="sourceLineNo">078</span> public static final String BALANCER_DECISION_BUFFER_ENABLED =<a name="line.78"></a> |
| <span class="sourceLineNo">079</span> "hbase.master.balancer.decision.buffer.enabled";<a name="line.79"></a> |
| <span class="sourceLineNo">080</span> public static final boolean DEFAULT_BALANCER_DECISION_BUFFER_ENABLED = false;<a name="line.80"></a> |
| <span class="sourceLineNo">081</span><a name="line.81"></a> |
| <span class="sourceLineNo">082</span> protected static final int MIN_SERVER_BALANCE = 2;<a name="line.82"></a> |
| <span class="sourceLineNo">083</span> private volatile boolean stopped = false;<a name="line.83"></a> |
| <span class="sourceLineNo">084</span><a name="line.84"></a> |
| <span class="sourceLineNo">085</span> private static final List<RegionInfo> EMPTY_REGION_LIST = Collections.emptyList();<a name="line.85"></a> |
| <span class="sourceLineNo">086</span><a name="line.86"></a> |
| <span class="sourceLineNo">087</span> static final Predicate<ServerMetrics> IDLE_SERVER_PREDICATOR<a name="line.87"></a> |
| <span class="sourceLineNo">088</span> = load -> load.getRegionMetrics().isEmpty();<a name="line.88"></a> |
| <span class="sourceLineNo">089</span><a name="line.89"></a> |
| <span class="sourceLineNo">090</span> protected RegionHDFSBlockLocationFinder regionFinder;<a name="line.90"></a> |
| <span class="sourceLineNo">091</span> protected boolean useRegionFinder;<a name="line.91"></a> |
| <span class="sourceLineNo">092</span> protected boolean isByTable = false;<a name="line.92"></a> |
| <span class="sourceLineNo">093</span><a name="line.93"></a> |
| <span class="sourceLineNo">094</span> private static class DefaultRackManager extends RackManager {<a name="line.94"></a> |
| <span class="sourceLineNo">095</span> @Override<a name="line.95"></a> |
| <span class="sourceLineNo">096</span> public String getRack(ServerName server) {<a name="line.96"></a> |
| <span class="sourceLineNo">097</span> return UNKNOWN_RACK;<a name="line.97"></a> |
| <span class="sourceLineNo">098</span> }<a name="line.98"></a> |
| <span class="sourceLineNo">099</span> }<a name="line.99"></a> |
| <span class="sourceLineNo">100</span><a name="line.100"></a> |
| <span class="sourceLineNo">101</span> /**<a name="line.101"></a> |
| <span class="sourceLineNo">102</span> * The constructor that uses the basic MetricsBalancer<a name="line.102"></a> |
| <span class="sourceLineNo">103</span> */<a name="line.103"></a> |
| <span class="sourceLineNo">104</span> protected BaseLoadBalancer() {<a name="line.104"></a> |
| <span class="sourceLineNo">105</span> metricsBalancer = new MetricsBalancer();<a name="line.105"></a> |
| <span class="sourceLineNo">106</span> createRegionFinder();<a name="line.106"></a> |
| <span class="sourceLineNo">107</span> }<a name="line.107"></a> |
| <span class="sourceLineNo">108</span><a name="line.108"></a> |
| <span class="sourceLineNo">109</span> /**<a name="line.109"></a> |
| <span class="sourceLineNo">110</span> * This Constructor accepts an instance of MetricsBalancer,<a name="line.110"></a> |
| <span class="sourceLineNo">111</span> * which will be used instead of creating a new one<a name="line.111"></a> |
| <span class="sourceLineNo">112</span> */<a name="line.112"></a> |
| <span class="sourceLineNo">113</span> protected BaseLoadBalancer(MetricsBalancer metricsBalancer) {<a name="line.113"></a> |
| <span class="sourceLineNo">114</span> this.metricsBalancer = (metricsBalancer != null) ? metricsBalancer : new MetricsBalancer();<a name="line.114"></a> |
| <span class="sourceLineNo">115</span> createRegionFinder();<a name="line.115"></a> |
| <span class="sourceLineNo">116</span> }<a name="line.116"></a> |
| <span class="sourceLineNo">117</span><a name="line.117"></a> |
| <span class="sourceLineNo">118</span> private void createRegionFinder() {<a name="line.118"></a> |
| <span class="sourceLineNo">119</span> useRegionFinder = config.getBoolean("hbase.master.balancer.uselocality", true);<a name="line.119"></a> |
| <span class="sourceLineNo">120</span> if (useRegionFinder) {<a name="line.120"></a> |
| <span class="sourceLineNo">121</span> regionFinder = new RegionHDFSBlockLocationFinder();<a name="line.121"></a> |
| <span class="sourceLineNo">122</span> }<a name="line.122"></a> |
| <span class="sourceLineNo">123</span> }<a name="line.123"></a> |
| <span class="sourceLineNo">124</span><a name="line.124"></a> |
| <span class="sourceLineNo">125</span> /**<a name="line.125"></a> |
| <span class="sourceLineNo">126</span> * An efficient array based implementation similar to ClusterState for keeping<a name="line.126"></a> |
| <span class="sourceLineNo">127</span> * the status of the cluster in terms of region assignment and distribution.<a name="line.127"></a> |
| <span class="sourceLineNo">128</span> * LoadBalancers, such as StochasticLoadBalancer uses this Cluster object because of<a name="line.128"></a> |
| <span class="sourceLineNo">129</span> * hundreds of thousands of hashmap manipulations are very costly, which is why this<a name="line.129"></a> |
| <span class="sourceLineNo">130</span> * class uses mostly indexes and arrays.<a name="line.130"></a> |
| <span class="sourceLineNo">131</span> *<a name="line.131"></a> |
| <span class="sourceLineNo">132</span> * Cluster tracks a list of unassigned regions, region assignments, and the server<a name="line.132"></a> |
| <span class="sourceLineNo">133</span> * topology in terms of server names, hostnames and racks.<a name="line.133"></a> |
| <span class="sourceLineNo">134</span> */<a name="line.134"></a> |
| <span class="sourceLineNo">135</span> protected static class Cluster {<a name="line.135"></a> |
| <span class="sourceLineNo">136</span> ServerName[] servers;<a name="line.136"></a> |
| <span class="sourceLineNo">137</span> String[] hosts; // ServerName uniquely identifies a region server. multiple RS can run on the same host<a name="line.137"></a> |
| <span class="sourceLineNo">138</span> String[] racks;<a name="line.138"></a> |
| <span class="sourceLineNo">139</span> boolean multiServersPerHost = false; // whether or not any host has more than one server<a name="line.139"></a> |
| <span class="sourceLineNo">140</span><a name="line.140"></a> |
| <span class="sourceLineNo">141</span> ArrayList<String> tables;<a name="line.141"></a> |
| <span class="sourceLineNo">142</span> RegionInfo[] regions;<a name="line.142"></a> |
| <span class="sourceLineNo">143</span> Deque<BalancerRegionLoad>[] regionLoads;<a name="line.143"></a> |
| <span class="sourceLineNo">144</span> private RegionHDFSBlockLocationFinder regionFinder;<a name="line.144"></a> |
| <span class="sourceLineNo">145</span><a name="line.145"></a> |
| <span class="sourceLineNo">146</span> int[][] regionLocations; //regionIndex -> list of serverIndex sorted by locality<a name="line.146"></a> |
| <span class="sourceLineNo">147</span><a name="line.147"></a> |
| <span class="sourceLineNo">148</span> int[] serverIndexToHostIndex; //serverIndex -> host index<a name="line.148"></a> |
| <span class="sourceLineNo">149</span> int[] serverIndexToRackIndex; //serverIndex -> rack index<a name="line.149"></a> |
| <span class="sourceLineNo">150</span><a name="line.150"></a> |
| <span class="sourceLineNo">151</span> int[][] regionsPerServer; //serverIndex -> region list<a name="line.151"></a> |
| <span class="sourceLineNo">152</span> int[] serverIndexToRegionsOffset; //serverIndex -> offset of region list<a name="line.152"></a> |
| <span class="sourceLineNo">153</span> int[][] regionsPerHost; //hostIndex -> list of regions<a name="line.153"></a> |
| <span class="sourceLineNo">154</span> int[][] regionsPerRack; //rackIndex -> region list<a name="line.154"></a> |
| <span class="sourceLineNo">155</span> int[][] primariesOfRegionsPerServer; //serverIndex -> sorted list of regions by primary region index<a name="line.155"></a> |
| <span class="sourceLineNo">156</span> int[][] primariesOfRegionsPerHost; //hostIndex -> sorted list of regions by primary region index<a name="line.156"></a> |
| <span class="sourceLineNo">157</span> int[][] primariesOfRegionsPerRack; //rackIndex -> sorted list of regions by primary region index<a name="line.157"></a> |
| <span class="sourceLineNo">158</span><a name="line.158"></a> |
| <span class="sourceLineNo">159</span> int[][] serversPerHost; //hostIndex -> list of server indexes<a name="line.159"></a> |
| <span class="sourceLineNo">160</span> int[][] serversPerRack; //rackIndex -> list of server indexes<a name="line.160"></a> |
| <span class="sourceLineNo">161</span> int[] regionIndexToServerIndex; //regionIndex -> serverIndex<a name="line.161"></a> |
| <span class="sourceLineNo">162</span> int[] initialRegionIndexToServerIndex; //regionIndex -> serverIndex (initial cluster state)<a name="line.162"></a> |
| <span class="sourceLineNo">163</span> int[] regionIndexToTableIndex; //regionIndex -> tableIndex<a name="line.163"></a> |
| <span class="sourceLineNo">164</span> int[][] numRegionsPerServerPerTable; //serverIndex -> tableIndex -> # regions<a name="line.164"></a> |
| <span class="sourceLineNo">165</span> int[] numMaxRegionsPerTable; //tableIndex -> max number of regions in a single RS<a name="line.165"></a> |
| <span class="sourceLineNo">166</span> int[] regionIndexToPrimaryIndex; //regionIndex -> regionIndex of the primary<a name="line.166"></a> |
| <span class="sourceLineNo">167</span> boolean hasRegionReplicas = false; //whether there is regions with replicas<a name="line.167"></a> |
| <span class="sourceLineNo">168</span><a name="line.168"></a> |
| <span class="sourceLineNo">169</span> Integer[] serverIndicesSortedByRegionCount;<a name="line.169"></a> |
| <span class="sourceLineNo">170</span> Integer[] serverIndicesSortedByLocality;<a name="line.170"></a> |
| <span class="sourceLineNo">171</span><a name="line.171"></a> |
| <span class="sourceLineNo">172</span> Map<Address, Integer> serversToIndex;<a name="line.172"></a> |
| <span class="sourceLineNo">173</span> Map<String, Integer> hostsToIndex;<a name="line.173"></a> |
| <span class="sourceLineNo">174</span> Map<String, Integer> racksToIndex;<a name="line.174"></a> |
| <span class="sourceLineNo">175</span> Map<String, Integer> tablesToIndex;<a name="line.175"></a> |
| <span class="sourceLineNo">176</span> Map<RegionInfo, Integer> regionsToIndex;<a name="line.176"></a> |
| <span class="sourceLineNo">177</span> float[] localityPerServer;<a name="line.177"></a> |
| <span class="sourceLineNo">178</span><a name="line.178"></a> |
| <span class="sourceLineNo">179</span> int numServers;<a name="line.179"></a> |
| <span class="sourceLineNo">180</span> int numHosts;<a name="line.180"></a> |
| <span class="sourceLineNo">181</span> int numRacks;<a name="line.181"></a> |
| <span class="sourceLineNo">182</span> int numTables;<a name="line.182"></a> |
| <span class="sourceLineNo">183</span> int numRegions;<a name="line.183"></a> |
| <span class="sourceLineNo">184</span><a name="line.184"></a> |
| <span class="sourceLineNo">185</span> int numMovedRegions = 0; //num moved regions from the initial configuration<a name="line.185"></a> |
| <span class="sourceLineNo">186</span> Map<ServerName, List<RegionInfo>> clusterState;<a name="line.186"></a> |
| <span class="sourceLineNo">187</span><a name="line.187"></a> |
| <span class="sourceLineNo">188</span> protected final RackManager rackManager;<a name="line.188"></a> |
| <span class="sourceLineNo">189</span> // Maps region -> rackIndex -> locality of region on rack<a name="line.189"></a> |
| <span class="sourceLineNo">190</span> private float[][] rackLocalities;<a name="line.190"></a> |
| <span class="sourceLineNo">191</span> // Maps localityType -> region -> [server|rack]Index with highest locality<a name="line.191"></a> |
| <span class="sourceLineNo">192</span> private int[][] regionsToMostLocalEntities;<a name="line.192"></a> |
| <span class="sourceLineNo">193</span><a name="line.193"></a> |
| <span class="sourceLineNo">194</span> protected Cluster(<a name="line.194"></a> |
| <span class="sourceLineNo">195</span> Map<ServerName, List<RegionInfo>> clusterState,<a name="line.195"></a> |
| <span class="sourceLineNo">196</span> Map<String, Deque<BalancerRegionLoad>> loads,<a name="line.196"></a> |
| <span class="sourceLineNo">197</span> RegionHDFSBlockLocationFinder regionFinder,<a name="line.197"></a> |
| <span class="sourceLineNo">198</span> RackManager rackManager) {<a name="line.198"></a> |
| <span class="sourceLineNo">199</span> this(null, clusterState, loads, regionFinder, rackManager);<a name="line.199"></a> |
| <span class="sourceLineNo">200</span> }<a name="line.200"></a> |
| <span class="sourceLineNo">201</span><a name="line.201"></a> |
| <span class="sourceLineNo">202</span> @SuppressWarnings("unchecked")<a name="line.202"></a> |
| <span class="sourceLineNo">203</span> protected Cluster(<a name="line.203"></a> |
| <span class="sourceLineNo">204</span> Collection<RegionInfo> unassignedRegions,<a name="line.204"></a> |
| <span class="sourceLineNo">205</span> Map<ServerName, List<RegionInfo>> clusterState,<a name="line.205"></a> |
| <span class="sourceLineNo">206</span> Map<String, Deque<BalancerRegionLoad>> loads,<a name="line.206"></a> |
| <span class="sourceLineNo">207</span> RegionHDFSBlockLocationFinder regionFinder,<a name="line.207"></a> |
| <span class="sourceLineNo">208</span> RackManager rackManager) {<a name="line.208"></a> |
| <span class="sourceLineNo">209</span><a name="line.209"></a> |
| <span class="sourceLineNo">210</span> if (unassignedRegions == null) {<a name="line.210"></a> |
| <span class="sourceLineNo">211</span> unassignedRegions = EMPTY_REGION_LIST;<a name="line.211"></a> |
| <span class="sourceLineNo">212</span> }<a name="line.212"></a> |
| <span class="sourceLineNo">213</span><a name="line.213"></a> |
| <span class="sourceLineNo">214</span> serversToIndex = new HashMap<>();<a name="line.214"></a> |
| <span class="sourceLineNo">215</span> hostsToIndex = new HashMap<>();<a name="line.215"></a> |
| <span class="sourceLineNo">216</span> racksToIndex = new HashMap<>();<a name="line.216"></a> |
| <span class="sourceLineNo">217</span> tablesToIndex = new HashMap<>();<a name="line.217"></a> |
| <span class="sourceLineNo">218</span><a name="line.218"></a> |
| <span class="sourceLineNo">219</span> //TODO: We should get the list of tables from master<a name="line.219"></a> |
| <span class="sourceLineNo">220</span> tables = new ArrayList<>();<a name="line.220"></a> |
| <span class="sourceLineNo">221</span> this.rackManager = rackManager != null ? rackManager : new DefaultRackManager();<a name="line.221"></a> |
| <span class="sourceLineNo">222</span><a name="line.222"></a> |
| <span class="sourceLineNo">223</span> numRegions = 0;<a name="line.223"></a> |
| <span class="sourceLineNo">224</span><a name="line.224"></a> |
| <span class="sourceLineNo">225</span> List<List<Integer>> serversPerHostList = new ArrayList<>();<a name="line.225"></a> |
| <span class="sourceLineNo">226</span> List<List<Integer>> serversPerRackList = new ArrayList<>();<a name="line.226"></a> |
| <span class="sourceLineNo">227</span> this.clusterState = clusterState;<a name="line.227"></a> |
| <span class="sourceLineNo">228</span> this.regionFinder = regionFinder;<a name="line.228"></a> |
| <span class="sourceLineNo">229</span><a name="line.229"></a> |
| <span class="sourceLineNo">230</span> // Use servername and port as there can be dead servers in this list. We want everything with<a name="line.230"></a> |
| <span class="sourceLineNo">231</span> // a matching hostname and port to have the same index.<a name="line.231"></a> |
| <span class="sourceLineNo">232</span> for (ServerName sn : clusterState.keySet()) {<a name="line.232"></a> |
| <span class="sourceLineNo">233</span> if (sn == null) {<a name="line.233"></a> |
| <span class="sourceLineNo">234</span> LOG.warn("TODO: Enable TRACE on BaseLoadBalancer. Empty servername); " +<a name="line.234"></a> |
| <span class="sourceLineNo">235</span> "skipping; unassigned regions?");<a name="line.235"></a> |
| <span class="sourceLineNo">236</span> if (LOG.isTraceEnabled()) {<a name="line.236"></a> |
| <span class="sourceLineNo">237</span> LOG.trace("EMPTY SERVERNAME " + clusterState.toString());<a name="line.237"></a> |
| <span class="sourceLineNo">238</span> }<a name="line.238"></a> |
| <span class="sourceLineNo">239</span> continue;<a name="line.239"></a> |
| <span class="sourceLineNo">240</span> }<a name="line.240"></a> |
| <span class="sourceLineNo">241</span> if (serversToIndex.get(sn.getAddress()) == null) {<a name="line.241"></a> |
| <span class="sourceLineNo">242</span> serversToIndex.put(sn.getAddress(), numServers++);<a name="line.242"></a> |
| <span class="sourceLineNo">243</span> }<a name="line.243"></a> |
| <span class="sourceLineNo">244</span> if (!hostsToIndex.containsKey(sn.getHostname())) {<a name="line.244"></a> |
| <span class="sourceLineNo">245</span> hostsToIndex.put(sn.getHostname(), numHosts++);<a name="line.245"></a> |
| <span class="sourceLineNo">246</span> serversPerHostList.add(new ArrayList<>(1));<a name="line.246"></a> |
| <span class="sourceLineNo">247</span> }<a name="line.247"></a> |
| <span class="sourceLineNo">248</span><a name="line.248"></a> |
| <span class="sourceLineNo">249</span> int serverIndex = serversToIndex.get(sn.getAddress());<a name="line.249"></a> |
| <span class="sourceLineNo">250</span> int hostIndex = hostsToIndex.get(sn.getHostname());<a name="line.250"></a> |
| <span class="sourceLineNo">251</span> serversPerHostList.get(hostIndex).add(serverIndex);<a name="line.251"></a> |
| <span class="sourceLineNo">252</span><a name="line.252"></a> |
| <span class="sourceLineNo">253</span> String rack = this.rackManager.getRack(sn);<a name="line.253"></a> |
| <span class="sourceLineNo">254</span> if (!racksToIndex.containsKey(rack)) {<a name="line.254"></a> |
| <span class="sourceLineNo">255</span> racksToIndex.put(rack, numRacks++);<a name="line.255"></a> |
| <span class="sourceLineNo">256</span> serversPerRackList.add(new ArrayList<>());<a name="line.256"></a> |
| <span class="sourceLineNo">257</span> }<a name="line.257"></a> |
| <span class="sourceLineNo">258</span> int rackIndex = racksToIndex.get(rack);<a name="line.258"></a> |
| <span class="sourceLineNo">259</span> serversPerRackList.get(rackIndex).add(serverIndex);<a name="line.259"></a> |
| <span class="sourceLineNo">260</span> }<a name="line.260"></a> |
| <span class="sourceLineNo">261</span><a name="line.261"></a> |
| <span class="sourceLineNo">262</span> // Count how many regions there are.<a name="line.262"></a> |
| <span class="sourceLineNo">263</span> for (Entry<ServerName, List<RegionInfo>> entry : clusterState.entrySet()) {<a name="line.263"></a> |
| <span class="sourceLineNo">264</span> numRegions += entry.getValue().size();<a name="line.264"></a> |
| <span class="sourceLineNo">265</span> }<a name="line.265"></a> |
| <span class="sourceLineNo">266</span> numRegions += unassignedRegions.size();<a name="line.266"></a> |
| <span class="sourceLineNo">267</span><a name="line.267"></a> |
| <span class="sourceLineNo">268</span> regionsToIndex = new HashMap<>(numRegions);<a name="line.268"></a> |
| <span class="sourceLineNo">269</span> servers = new ServerName[numServers];<a name="line.269"></a> |
| <span class="sourceLineNo">270</span> serversPerHost = new int[numHosts][];<a name="line.270"></a> |
| <span class="sourceLineNo">271</span> serversPerRack = new int[numRacks][];<a name="line.271"></a> |
| <span class="sourceLineNo">272</span> regions = new RegionInfo[numRegions];<a name="line.272"></a> |
| <span class="sourceLineNo">273</span> regionIndexToServerIndex = new int[numRegions];<a name="line.273"></a> |
| <span class="sourceLineNo">274</span> initialRegionIndexToServerIndex = new int[numRegions];<a name="line.274"></a> |
| <span class="sourceLineNo">275</span> regionIndexToTableIndex = new int[numRegions];<a name="line.275"></a> |
| <span class="sourceLineNo">276</span> regionIndexToPrimaryIndex = new int[numRegions];<a name="line.276"></a> |
| <span class="sourceLineNo">277</span> regionLoads = new Deque[numRegions];<a name="line.277"></a> |
| <span class="sourceLineNo">278</span><a name="line.278"></a> |
| <span class="sourceLineNo">279</span> regionLocations = new int[numRegions][];<a name="line.279"></a> |
| <span class="sourceLineNo">280</span> serverIndicesSortedByRegionCount = new Integer[numServers];<a name="line.280"></a> |
| <span class="sourceLineNo">281</span> serverIndicesSortedByLocality = new Integer[numServers];<a name="line.281"></a> |
| <span class="sourceLineNo">282</span> localityPerServer = new float[numServers];<a name="line.282"></a> |
| <span class="sourceLineNo">283</span><a name="line.283"></a> |
| <span class="sourceLineNo">284</span> serverIndexToHostIndex = new int[numServers];<a name="line.284"></a> |
| <span class="sourceLineNo">285</span> serverIndexToRackIndex = new int[numServers];<a name="line.285"></a> |
| <span class="sourceLineNo">286</span> regionsPerServer = new int[numServers][];<a name="line.286"></a> |
| <span class="sourceLineNo">287</span> serverIndexToRegionsOffset = new int[numServers];<a name="line.287"></a> |
| <span class="sourceLineNo">288</span> regionsPerHost = new int[numHosts][];<a name="line.288"></a> |
| <span class="sourceLineNo">289</span> regionsPerRack = new int[numRacks][];<a name="line.289"></a> |
| <span class="sourceLineNo">290</span> primariesOfRegionsPerServer = new int[numServers][];<a name="line.290"></a> |
| <span class="sourceLineNo">291</span> primariesOfRegionsPerHost = new int[numHosts][];<a name="line.291"></a> |
| <span class="sourceLineNo">292</span> primariesOfRegionsPerRack = new int[numRacks][];<a name="line.292"></a> |
| <span class="sourceLineNo">293</span><a name="line.293"></a> |
| <span class="sourceLineNo">294</span> int tableIndex = 0, regionIndex = 0, regionPerServerIndex = 0;<a name="line.294"></a> |
| <span class="sourceLineNo">295</span><a name="line.295"></a> |
| <span class="sourceLineNo">296</span> for (Entry<ServerName, List<RegionInfo>> entry : clusterState.entrySet()) {<a name="line.296"></a> |
| <span class="sourceLineNo">297</span> if (entry.getKey() == null) {<a name="line.297"></a> |
| <span class="sourceLineNo">298</span> LOG.warn("SERVERNAME IS NULL, skipping " + entry.getValue());<a name="line.298"></a> |
| <span class="sourceLineNo">299</span> continue;<a name="line.299"></a> |
| <span class="sourceLineNo">300</span> }<a name="line.300"></a> |
| <span class="sourceLineNo">301</span> int serverIndex = serversToIndex.get(entry.getKey().getAddress());<a name="line.301"></a> |
| <span class="sourceLineNo">302</span><a name="line.302"></a> |
| <span class="sourceLineNo">303</span> // keep the servername if this is the first server name for this hostname<a name="line.303"></a> |
| <span class="sourceLineNo">304</span> // or this servername has the newest startcode.<a name="line.304"></a> |
| <span class="sourceLineNo">305</span> if (servers[serverIndex] == null ||<a name="line.305"></a> |
| <span class="sourceLineNo">306</span> servers[serverIndex].getStartcode() < entry.getKey().getStartcode()) {<a name="line.306"></a> |
| <span class="sourceLineNo">307</span> servers[serverIndex] = entry.getKey();<a name="line.307"></a> |
| <span class="sourceLineNo">308</span> }<a name="line.308"></a> |
| <span class="sourceLineNo">309</span><a name="line.309"></a> |
| <span class="sourceLineNo">310</span> if (regionsPerServer[serverIndex] != null) {<a name="line.310"></a> |
| <span class="sourceLineNo">311</span> // there is another server with the same hostAndPort in ClusterState.<a name="line.311"></a> |
| <span class="sourceLineNo">312</span> // allocate the array for the total size<a name="line.312"></a> |
| <span class="sourceLineNo">313</span> regionsPerServer[serverIndex] = new int[entry.getValue().size() + regionsPerServer[serverIndex].length];<a name="line.313"></a> |
| <span class="sourceLineNo">314</span> } else {<a name="line.314"></a> |
| <span class="sourceLineNo">315</span> regionsPerServer[serverIndex] = new int[entry.getValue().size()];<a name="line.315"></a> |
| <span class="sourceLineNo">316</span> }<a name="line.316"></a> |
| <span class="sourceLineNo">317</span> primariesOfRegionsPerServer[serverIndex] = new int[regionsPerServer[serverIndex].length];<a name="line.317"></a> |
| <span class="sourceLineNo">318</span> serverIndicesSortedByRegionCount[serverIndex] = serverIndex;<a name="line.318"></a> |
| <span class="sourceLineNo">319</span> serverIndicesSortedByLocality[serverIndex] = serverIndex;<a name="line.319"></a> |
| <span class="sourceLineNo">320</span> }<a name="line.320"></a> |
| <span class="sourceLineNo">321</span><a name="line.321"></a> |
| <span class="sourceLineNo">322</span> hosts = new String[numHosts];<a name="line.322"></a> |
| <span class="sourceLineNo">323</span> for (Entry<String, Integer> entry : hostsToIndex.entrySet()) {<a name="line.323"></a> |
| <span class="sourceLineNo">324</span> hosts[entry.getValue()] = entry.getKey();<a name="line.324"></a> |
| <span class="sourceLineNo">325</span> }<a name="line.325"></a> |
| <span class="sourceLineNo">326</span> racks = new String[numRacks];<a name="line.326"></a> |
| <span class="sourceLineNo">327</span> for (Entry<String, Integer> entry : racksToIndex.entrySet()) {<a name="line.327"></a> |
| <span class="sourceLineNo">328</span> racks[entry.getValue()] = entry.getKey();<a name="line.328"></a> |
| <span class="sourceLineNo">329</span> }<a name="line.329"></a> |
| <span class="sourceLineNo">330</span><a name="line.330"></a> |
| <span class="sourceLineNo">331</span> for (Entry<ServerName, List<RegionInfo>> entry : clusterState.entrySet()) {<a name="line.331"></a> |
| <span class="sourceLineNo">332</span> int serverIndex = serversToIndex.get(entry.getKey().getAddress());<a name="line.332"></a> |
| <span class="sourceLineNo">333</span> regionPerServerIndex = serverIndexToRegionsOffset[serverIndex];<a name="line.333"></a> |
| <span class="sourceLineNo">334</span><a name="line.334"></a> |
| <span class="sourceLineNo">335</span> int hostIndex = hostsToIndex.get(entry.getKey().getHostname());<a name="line.335"></a> |
| <span class="sourceLineNo">336</span> serverIndexToHostIndex[serverIndex] = hostIndex;<a name="line.336"></a> |
| <span class="sourceLineNo">337</span><a name="line.337"></a> |
| <span class="sourceLineNo">338</span> int rackIndex = racksToIndex.get(this.rackManager.getRack(entry.getKey()));<a name="line.338"></a> |
| <span class="sourceLineNo">339</span> serverIndexToRackIndex[serverIndex] = rackIndex;<a name="line.339"></a> |
| <span class="sourceLineNo">340</span><a name="line.340"></a> |
| <span class="sourceLineNo">341</span> for (RegionInfo region : entry.getValue()) {<a name="line.341"></a> |
| <span class="sourceLineNo">342</span> registerRegion(region, regionIndex, serverIndex, loads, regionFinder);<a name="line.342"></a> |
| <span class="sourceLineNo">343</span> regionsPerServer[serverIndex][regionPerServerIndex++] = regionIndex;<a name="line.343"></a> |
| <span class="sourceLineNo">344</span> regionIndex++;<a name="line.344"></a> |
| <span class="sourceLineNo">345</span> }<a name="line.345"></a> |
| <span class="sourceLineNo">346</span> serverIndexToRegionsOffset[serverIndex] = regionPerServerIndex;<a name="line.346"></a> |
| <span class="sourceLineNo">347</span> }<a name="line.347"></a> |
| <span class="sourceLineNo">348</span><a name="line.348"></a> |
| <span class="sourceLineNo">349</span> for (RegionInfo region : unassignedRegions) {<a name="line.349"></a> |
| <span class="sourceLineNo">350</span> registerRegion(region, regionIndex, -1, loads, regionFinder);<a name="line.350"></a> |
| <span class="sourceLineNo">351</span> regionIndex++;<a name="line.351"></a> |
| <span class="sourceLineNo">352</span> }<a name="line.352"></a> |
| <span class="sourceLineNo">353</span><a name="line.353"></a> |
| <span class="sourceLineNo">354</span> for (int i = 0; i < serversPerHostList.size(); i++) {<a name="line.354"></a> |
| <span class="sourceLineNo">355</span> serversPerHost[i] = new int[serversPerHostList.get(i).size()];<a name="line.355"></a> |
| <span class="sourceLineNo">356</span> for (int j = 0; j < serversPerHost[i].length; j++) {<a name="line.356"></a> |
| <span class="sourceLineNo">357</span> serversPerHost[i][j] = serversPerHostList.get(i).get(j);<a name="line.357"></a> |
| <span class="sourceLineNo">358</span> }<a name="line.358"></a> |
| <span class="sourceLineNo">359</span> if (serversPerHost[i].length > 1) {<a name="line.359"></a> |
| <span class="sourceLineNo">360</span> multiServersPerHost = true;<a name="line.360"></a> |
| <span class="sourceLineNo">361</span> }<a name="line.361"></a> |
| <span class="sourceLineNo">362</span> }<a name="line.362"></a> |
| <span class="sourceLineNo">363</span><a name="line.363"></a> |
| <span class="sourceLineNo">364</span> for (int i = 0; i < serversPerRackList.size(); i++) {<a name="line.364"></a> |
| <span class="sourceLineNo">365</span> serversPerRack[i] = new int[serversPerRackList.get(i).size()];<a name="line.365"></a> |
| <span class="sourceLineNo">366</span> for (int j = 0; j < serversPerRack[i].length; j++) {<a name="line.366"></a> |
| <span class="sourceLineNo">367</span> serversPerRack[i][j] = serversPerRackList.get(i).get(j);<a name="line.367"></a> |
| <span class="sourceLineNo">368</span> }<a name="line.368"></a> |
| <span class="sourceLineNo">369</span> }<a name="line.369"></a> |
| <span class="sourceLineNo">370</span><a name="line.370"></a> |
| <span class="sourceLineNo">371</span> numTables = tables.size();<a name="line.371"></a> |
| <span class="sourceLineNo">372</span> numRegionsPerServerPerTable = new int[numServers][numTables];<a name="line.372"></a> |
| <span class="sourceLineNo">373</span><a name="line.373"></a> |
| <span class="sourceLineNo">374</span> for (int i = 0; i < numServers; i++) {<a name="line.374"></a> |
| <span class="sourceLineNo">375</span> for (int j = 0; j < numTables; j++) {<a name="line.375"></a> |
| <span class="sourceLineNo">376</span> numRegionsPerServerPerTable[i][j] = 0;<a name="line.376"></a> |
| <span class="sourceLineNo">377</span> }<a name="line.377"></a> |
| <span class="sourceLineNo">378</span> }<a name="line.378"></a> |
| <span class="sourceLineNo">379</span><a name="line.379"></a> |
| <span class="sourceLineNo">380</span> for (int i=0; i < regionIndexToServerIndex.length; i++) {<a name="line.380"></a> |
| <span class="sourceLineNo">381</span> if (regionIndexToServerIndex[i] >= 0) {<a name="line.381"></a> |
| <span class="sourceLineNo">382</span> numRegionsPerServerPerTable[regionIndexToServerIndex[i]][regionIndexToTableIndex[i]]++;<a name="line.382"></a> |
| <span class="sourceLineNo">383</span> }<a name="line.383"></a> |
| <span class="sourceLineNo">384</span> }<a name="line.384"></a> |
| <span class="sourceLineNo">385</span><a name="line.385"></a> |
| <span class="sourceLineNo">386</span> numMaxRegionsPerTable = new int[numTables];<a name="line.386"></a> |
| <span class="sourceLineNo">387</span> for (int[] aNumRegionsPerServerPerTable : numRegionsPerServerPerTable) {<a name="line.387"></a> |
| <span class="sourceLineNo">388</span> for (tableIndex = 0; tableIndex < aNumRegionsPerServerPerTable.length; tableIndex++) {<a name="line.388"></a> |
| <span class="sourceLineNo">389</span> if (aNumRegionsPerServerPerTable[tableIndex] > numMaxRegionsPerTable[tableIndex]) {<a name="line.389"></a> |
| <span class="sourceLineNo">390</span> numMaxRegionsPerTable[tableIndex] = aNumRegionsPerServerPerTable[tableIndex];<a name="line.390"></a> |
| <span class="sourceLineNo">391</span> }<a name="line.391"></a> |
| <span class="sourceLineNo">392</span> }<a name="line.392"></a> |
| <span class="sourceLineNo">393</span> }<a name="line.393"></a> |
| <span class="sourceLineNo">394</span><a name="line.394"></a> |
| <span class="sourceLineNo">395</span> for (int i = 0; i < regions.length; i ++) {<a name="line.395"></a> |
| <span class="sourceLineNo">396</span> RegionInfo info = regions[i];<a name="line.396"></a> |
| <span class="sourceLineNo">397</span> if (RegionReplicaUtil.isDefaultReplica(info)) {<a name="line.397"></a> |
| <span class="sourceLineNo">398</span> regionIndexToPrimaryIndex[i] = i;<a name="line.398"></a> |
| <span class="sourceLineNo">399</span> } else {<a name="line.399"></a> |
| <span class="sourceLineNo">400</span> hasRegionReplicas = true;<a name="line.400"></a> |
| <span class="sourceLineNo">401</span> RegionInfo primaryInfo = RegionReplicaUtil.getRegionInfoForDefaultReplica(info);<a name="line.401"></a> |
| <span class="sourceLineNo">402</span> regionIndexToPrimaryIndex[i] = regionsToIndex.getOrDefault(primaryInfo, -1);<a name="line.402"></a> |
| <span class="sourceLineNo">403</span> }<a name="line.403"></a> |
| <span class="sourceLineNo">404</span> }<a name="line.404"></a> |
| <span class="sourceLineNo">405</span><a name="line.405"></a> |
| <span class="sourceLineNo">406</span> for (int i = 0; i < regionsPerServer.length; i++) {<a name="line.406"></a> |
| <span class="sourceLineNo">407</span> primariesOfRegionsPerServer[i] = new int[regionsPerServer[i].length];<a name="line.407"></a> |
| <span class="sourceLineNo">408</span> for (int j = 0; j < regionsPerServer[i].length; j++) {<a name="line.408"></a> |
| <span class="sourceLineNo">409</span> int primaryIndex = regionIndexToPrimaryIndex[regionsPerServer[i][j]];<a name="line.409"></a> |
| <span class="sourceLineNo">410</span> primariesOfRegionsPerServer[i][j] = primaryIndex;<a name="line.410"></a> |
| <span class="sourceLineNo">411</span> }<a name="line.411"></a> |
| <span class="sourceLineNo">412</span> // sort the regions by primaries.<a name="line.412"></a> |
| <span class="sourceLineNo">413</span> Arrays.sort(primariesOfRegionsPerServer[i]);<a name="line.413"></a> |
| <span class="sourceLineNo">414</span> }<a name="line.414"></a> |
| <span class="sourceLineNo">415</span><a name="line.415"></a> |
| <span class="sourceLineNo">416</span> // compute regionsPerHost<a name="line.416"></a> |
| <span class="sourceLineNo">417</span> if (multiServersPerHost) {<a name="line.417"></a> |
| <span class="sourceLineNo">418</span> for (int i = 0 ; i < serversPerHost.length; i++) {<a name="line.418"></a> |
| <span class="sourceLineNo">419</span> int numRegionsPerHost = 0;<a name="line.419"></a> |
| <span class="sourceLineNo">420</span> for (int j = 0; j < serversPerHost[i].length; j++) {<a name="line.420"></a> |
| <span class="sourceLineNo">421</span> numRegionsPerHost += regionsPerServer[serversPerHost[i][j]].length;<a name="line.421"></a> |
| <span class="sourceLineNo">422</span> }<a name="line.422"></a> |
| <span class="sourceLineNo">423</span> regionsPerHost[i] = new int[numRegionsPerHost];<a name="line.423"></a> |
| <span class="sourceLineNo">424</span> primariesOfRegionsPerHost[i] = new int[numRegionsPerHost];<a name="line.424"></a> |
| <span class="sourceLineNo">425</span> }<a name="line.425"></a> |
| <span class="sourceLineNo">426</span> for (int i = 0 ; i < serversPerHost.length; i++) {<a name="line.426"></a> |
| <span class="sourceLineNo">427</span> int numRegionPerHostIndex = 0;<a name="line.427"></a> |
| <span class="sourceLineNo">428</span> for (int j = 0; j < serversPerHost[i].length; j++) {<a name="line.428"></a> |
| <span class="sourceLineNo">429</span> for (int k = 0; k < regionsPerServer[serversPerHost[i][j]].length; k++) {<a name="line.429"></a> |
| <span class="sourceLineNo">430</span> int region = regionsPerServer[serversPerHost[i][j]][k];<a name="line.430"></a> |
| <span class="sourceLineNo">431</span> regionsPerHost[i][numRegionPerHostIndex] = region;<a name="line.431"></a> |
| <span class="sourceLineNo">432</span> int primaryIndex = regionIndexToPrimaryIndex[region];<a name="line.432"></a> |
| <span class="sourceLineNo">433</span> primariesOfRegionsPerHost[i][numRegionPerHostIndex] = primaryIndex;<a name="line.433"></a> |
| <span class="sourceLineNo">434</span> numRegionPerHostIndex++;<a name="line.434"></a> |
| <span class="sourceLineNo">435</span> }<a name="line.435"></a> |
| <span class="sourceLineNo">436</span> }<a name="line.436"></a> |
| <span class="sourceLineNo">437</span> // sort the regions by primaries.<a name="line.437"></a> |
| <span class="sourceLineNo">438</span> Arrays.sort(primariesOfRegionsPerHost[i]);<a name="line.438"></a> |
| <span class="sourceLineNo">439</span> }<a name="line.439"></a> |
| <span class="sourceLineNo">440</span> }<a name="line.440"></a> |
| <span class="sourceLineNo">441</span><a name="line.441"></a> |
| <span class="sourceLineNo">442</span> // compute regionsPerRack<a name="line.442"></a> |
| <span class="sourceLineNo">443</span> if (numRacks > 1) {<a name="line.443"></a> |
| <span class="sourceLineNo">444</span> for (int i = 0 ; i < serversPerRack.length; i++) {<a name="line.444"></a> |
| <span class="sourceLineNo">445</span> int numRegionsPerRack = 0;<a name="line.445"></a> |
| <span class="sourceLineNo">446</span> for (int j = 0; j < serversPerRack[i].length; j++) {<a name="line.446"></a> |
| <span class="sourceLineNo">447</span> numRegionsPerRack += regionsPerServer[serversPerRack[i][j]].length;<a name="line.447"></a> |
| <span class="sourceLineNo">448</span> }<a name="line.448"></a> |
| <span class="sourceLineNo">449</span> regionsPerRack[i] = new int[numRegionsPerRack];<a name="line.449"></a> |
| <span class="sourceLineNo">450</span> primariesOfRegionsPerRack[i] = new int[numRegionsPerRack];<a name="line.450"></a> |
| <span class="sourceLineNo">451</span> }<a name="line.451"></a> |
| <span class="sourceLineNo">452</span><a name="line.452"></a> |
| <span class="sourceLineNo">453</span> for (int i = 0 ; i < serversPerRack.length; i++) {<a name="line.453"></a> |
| <span class="sourceLineNo">454</span> int numRegionPerRackIndex = 0;<a name="line.454"></a> |
| <span class="sourceLineNo">455</span> for (int j = 0; j < serversPerRack[i].length; j++) {<a name="line.455"></a> |
| <span class="sourceLineNo">456</span> for (int k = 0; k < regionsPerServer[serversPerRack[i][j]].length; k++) {<a name="line.456"></a> |
| <span class="sourceLineNo">457</span> int region = regionsPerServer[serversPerRack[i][j]][k];<a name="line.457"></a> |
| <span class="sourceLineNo">458</span> regionsPerRack[i][numRegionPerRackIndex] = region;<a name="line.458"></a> |
| <span class="sourceLineNo">459</span> int primaryIndex = regionIndexToPrimaryIndex[region];<a name="line.459"></a> |
| <span class="sourceLineNo">460</span> primariesOfRegionsPerRack[i][numRegionPerRackIndex] = primaryIndex;<a name="line.460"></a> |
| <span class="sourceLineNo">461</span> numRegionPerRackIndex++;<a name="line.461"></a> |
| <span class="sourceLineNo">462</span> }<a name="line.462"></a> |
| <span class="sourceLineNo">463</span> }<a name="line.463"></a> |
| <span class="sourceLineNo">464</span> // sort the regions by primaries.<a name="line.464"></a> |
| <span class="sourceLineNo">465</span> Arrays.sort(primariesOfRegionsPerRack[i]);<a name="line.465"></a> |
| <span class="sourceLineNo">466</span> }<a name="line.466"></a> |
| <span class="sourceLineNo">467</span> }<a name="line.467"></a> |
| <span class="sourceLineNo">468</span> }<a name="line.468"></a> |
| <span class="sourceLineNo">469</span><a name="line.469"></a> |
| <span class="sourceLineNo">470</span> /** Helper for Cluster constructor to handle a region */<a name="line.470"></a> |
| <span class="sourceLineNo">471</span> private void registerRegion(RegionInfo region, int regionIndex,<a name="line.471"></a> |
| <span class="sourceLineNo">472</span> int serverIndex, Map<String, Deque<BalancerRegionLoad>> loads,<a name="line.472"></a> |
| <span class="sourceLineNo">473</span> RegionHDFSBlockLocationFinder regionFinder) {<a name="line.473"></a> |
| <span class="sourceLineNo">474</span> String tableName = region.getTable().getNameAsString();<a name="line.474"></a> |
| <span class="sourceLineNo">475</span> if (!tablesToIndex.containsKey(tableName)) {<a name="line.475"></a> |
| <span class="sourceLineNo">476</span> tables.add(tableName);<a name="line.476"></a> |
| <span class="sourceLineNo">477</span> tablesToIndex.put(tableName, tablesToIndex.size());<a name="line.477"></a> |
| <span class="sourceLineNo">478</span> }<a name="line.478"></a> |
| <span class="sourceLineNo">479</span> int tableIndex = tablesToIndex.get(tableName);<a name="line.479"></a> |
| <span class="sourceLineNo">480</span><a name="line.480"></a> |
| <span class="sourceLineNo">481</span> regionsToIndex.put(region, regionIndex);<a name="line.481"></a> |
| <span class="sourceLineNo">482</span> regions[regionIndex] = region;<a name="line.482"></a> |
| <span class="sourceLineNo">483</span> regionIndexToServerIndex[regionIndex] = serverIndex;<a name="line.483"></a> |
| <span class="sourceLineNo">484</span> initialRegionIndexToServerIndex[regionIndex] = serverIndex;<a name="line.484"></a> |
| <span class="sourceLineNo">485</span> regionIndexToTableIndex[regionIndex] = tableIndex;<a name="line.485"></a> |
| <span class="sourceLineNo">486</span><a name="line.486"></a> |
| <span class="sourceLineNo">487</span> // region load<a name="line.487"></a> |
| <span class="sourceLineNo">488</span> if (loads != null) {<a name="line.488"></a> |
| <span class="sourceLineNo">489</span> Deque<BalancerRegionLoad> rl = loads.get(region.getRegionNameAsString());<a name="line.489"></a> |
| <span class="sourceLineNo">490</span> // That could have failed if the RegionLoad is using the other regionName<a name="line.490"></a> |
| <span class="sourceLineNo">491</span> if (rl == null) {<a name="line.491"></a> |
| <span class="sourceLineNo">492</span> // Try getting the region load using encoded name.<a name="line.492"></a> |
| <span class="sourceLineNo">493</span> rl = loads.get(region.getEncodedName());<a name="line.493"></a> |
| <span class="sourceLineNo">494</span> }<a name="line.494"></a> |
| <span class="sourceLineNo">495</span> regionLoads[regionIndex] = rl;<a name="line.495"></a> |
| <span class="sourceLineNo">496</span> }<a name="line.496"></a> |
| <span class="sourceLineNo">497</span><a name="line.497"></a> |
| <span class="sourceLineNo">498</span> if (regionFinder != null) {<a name="line.498"></a> |
| <span class="sourceLineNo">499</span> // region location<a name="line.499"></a> |
| <span class="sourceLineNo">500</span> List<ServerName> loc = regionFinder.getTopBlockLocations(region);<a name="line.500"></a> |
| <span class="sourceLineNo">501</span> regionLocations[regionIndex] = new int[loc.size()];<a name="line.501"></a> |
| <span class="sourceLineNo">502</span> for (int i = 0; i < loc.size(); i++) {<a name="line.502"></a> |
| <span class="sourceLineNo">503</span> regionLocations[regionIndex][i] = loc.get(i) == null ? -1<a name="line.503"></a> |
| <span class="sourceLineNo">504</span> : (serversToIndex.get(loc.get(i).getAddress()) == null ? -1<a name="line.504"></a> |
| <span class="sourceLineNo">505</span> : serversToIndex.get(loc.get(i).getAddress()));<a name="line.505"></a> |
| <span class="sourceLineNo">506</span> }<a name="line.506"></a> |
| <span class="sourceLineNo">507</span> }<a name="line.507"></a> |
| <span class="sourceLineNo">508</span> }<a name="line.508"></a> |
| <span class="sourceLineNo">509</span><a name="line.509"></a> |
| <span class="sourceLineNo">510</span> /**<a name="line.510"></a> |
| <span class="sourceLineNo">511</span> * Returns true iff a given server has less regions than the balanced amount<a name="line.511"></a> |
| <span class="sourceLineNo">512</span> */<a name="line.512"></a> |
| <span class="sourceLineNo">513</span> public boolean serverHasTooFewRegions(int server) {<a name="line.513"></a> |
| <span class="sourceLineNo">514</span> int minLoad = this.numRegions / numServers;<a name="line.514"></a> |
| <span class="sourceLineNo">515</span> int numRegions = getNumRegions(server);<a name="line.515"></a> |
| <span class="sourceLineNo">516</span> return numRegions < minLoad;<a name="line.516"></a> |
| <span class="sourceLineNo">517</span> }<a name="line.517"></a> |
| <span class="sourceLineNo">518</span><a name="line.518"></a> |
| <span class="sourceLineNo">519</span> /**<a name="line.519"></a> |
| <span class="sourceLineNo">520</span> * Retrieves and lazily initializes a field storing the locality of<a name="line.520"></a> |
| <span class="sourceLineNo">521</span> * every region/server combination<a name="line.521"></a> |
| <span class="sourceLineNo">522</span> */<a name="line.522"></a> |
| <span class="sourceLineNo">523</span> public float[][] getOrComputeRackLocalities() {<a name="line.523"></a> |
| <span class="sourceLineNo">524</span> if (rackLocalities == null || regionsToMostLocalEntities == null) {<a name="line.524"></a> |
| <span class="sourceLineNo">525</span> computeCachedLocalities();<a name="line.525"></a> |
| <span class="sourceLineNo">526</span> }<a name="line.526"></a> |
| <span class="sourceLineNo">527</span> return rackLocalities;<a name="line.527"></a> |
| <span class="sourceLineNo">528</span> }<a name="line.528"></a> |
| <span class="sourceLineNo">529</span><a name="line.529"></a> |
| <span class="sourceLineNo">530</span> /**<a name="line.530"></a> |
| <span class="sourceLineNo">531</span> * Lazily initializes and retrieves a mapping of region -> server for which region has<a name="line.531"></a> |
| <span class="sourceLineNo">532</span> * the highest the locality<a name="line.532"></a> |
| <span class="sourceLineNo">533</span> */<a name="line.533"></a> |
| <span class="sourceLineNo">534</span> public int[] getOrComputeRegionsToMostLocalEntities(LocalityType type) {<a name="line.534"></a> |
| <span class="sourceLineNo">535</span> if (rackLocalities == null || regionsToMostLocalEntities == null) {<a name="line.535"></a> |
| <span class="sourceLineNo">536</span> computeCachedLocalities();<a name="line.536"></a> |
| <span class="sourceLineNo">537</span> }<a name="line.537"></a> |
| <span class="sourceLineNo">538</span> return regionsToMostLocalEntities[type.ordinal()];<a name="line.538"></a> |
| <span class="sourceLineNo">539</span> }<a name="line.539"></a> |
| <span class="sourceLineNo">540</span><a name="line.540"></a> |
| <span class="sourceLineNo">541</span> /**<a name="line.541"></a> |
| <span class="sourceLineNo">542</span> * Looks up locality from cache of localities. Will create cache if it does<a name="line.542"></a> |
| <span class="sourceLineNo">543</span> * not already exist.<a name="line.543"></a> |
| <span class="sourceLineNo">544</span> */<a name="line.544"></a> |
| <span class="sourceLineNo">545</span> public float getOrComputeLocality(int region, int entity, LocalityType type) {<a name="line.545"></a> |
| <span class="sourceLineNo">546</span> switch (type) {<a name="line.546"></a> |
| <span class="sourceLineNo">547</span> case SERVER:<a name="line.547"></a> |
| <span class="sourceLineNo">548</span> return getLocalityOfRegion(region, entity);<a name="line.548"></a> |
| <span class="sourceLineNo">549</span> case RACK:<a name="line.549"></a> |
| <span class="sourceLineNo">550</span> return getOrComputeRackLocalities()[region][entity];<a name="line.550"></a> |
| <span class="sourceLineNo">551</span> default:<a name="line.551"></a> |
| <span class="sourceLineNo">552</span> throw new IllegalArgumentException("Unsupported LocalityType: " + type);<a name="line.552"></a> |
| <span class="sourceLineNo">553</span> }<a name="line.553"></a> |
| <span class="sourceLineNo">554</span> }<a name="line.554"></a> |
| <span class="sourceLineNo">555</span><a name="line.555"></a> |
| <span class="sourceLineNo">556</span> /**<a name="line.556"></a> |
| <span class="sourceLineNo">557</span> * Returns locality weighted by region size in MB. Will create locality cache<a name="line.557"></a> |
| <span class="sourceLineNo">558</span> * if it does not already exist.<a name="line.558"></a> |
| <span class="sourceLineNo">559</span> */<a name="line.559"></a> |
| <span class="sourceLineNo">560</span> public double getOrComputeWeightedLocality(int region, int server, LocalityType type) {<a name="line.560"></a> |
| <span class="sourceLineNo">561</span> return getRegionSizeMB(region) * getOrComputeLocality(region, server, type);<a name="line.561"></a> |
| <span class="sourceLineNo">562</span> }<a name="line.562"></a> |
| <span class="sourceLineNo">563</span><a name="line.563"></a> |
| <span class="sourceLineNo">564</span> /**<a name="line.564"></a> |
| <span class="sourceLineNo">565</span> * Returns the size in MB from the most recent RegionLoad for region<a name="line.565"></a> |
| <span class="sourceLineNo">566</span> */<a name="line.566"></a> |
| <span class="sourceLineNo">567</span> public int getRegionSizeMB(int region) {<a name="line.567"></a> |
| <span class="sourceLineNo">568</span> Deque<BalancerRegionLoad> load = regionLoads[region];<a name="line.568"></a> |
| <span class="sourceLineNo">569</span> // This means regions have no actual data on disk<a name="line.569"></a> |
| <span class="sourceLineNo">570</span> if (load == null) {<a name="line.570"></a> |
| <span class="sourceLineNo">571</span> return 0;<a name="line.571"></a> |
| <span class="sourceLineNo">572</span> }<a name="line.572"></a> |
| <span class="sourceLineNo">573</span> return regionLoads[region].getLast().getStorefileSizeMB();<a name="line.573"></a> |
| <span class="sourceLineNo">574</span> }<a name="line.574"></a> |
| <span class="sourceLineNo">575</span><a name="line.575"></a> |
| <span class="sourceLineNo">576</span> /**<a name="line.576"></a> |
| <span class="sourceLineNo">577</span> * Computes and caches the locality for each region/rack combinations,<a name="line.577"></a> |
| <span class="sourceLineNo">578</span> * as well as storing a mapping of region -> server and region -> rack such that server<a name="line.578"></a> |
| <span class="sourceLineNo">579</span> * and rack have the highest locality for region<a name="line.579"></a> |
| <span class="sourceLineNo">580</span> */<a name="line.580"></a> |
| <span class="sourceLineNo">581</span> private void computeCachedLocalities() {<a name="line.581"></a> |
| <span class="sourceLineNo">582</span> rackLocalities = new float[numRegions][numRacks];<a name="line.582"></a> |
| <span class="sourceLineNo">583</span> regionsToMostLocalEntities = new int[LocalityType.values().length][numRegions];<a name="line.583"></a> |
| <span class="sourceLineNo">584</span><a name="line.584"></a> |
| <span class="sourceLineNo">585</span> // Compute localities and find most local server per region<a name="line.585"></a> |
| <span class="sourceLineNo">586</span> for (int region = 0; region < numRegions; region++) {<a name="line.586"></a> |
| <span class="sourceLineNo">587</span> int serverWithBestLocality = 0;<a name="line.587"></a> |
| <span class="sourceLineNo">588</span> float bestLocalityForRegion = 0;<a name="line.588"></a> |
| <span class="sourceLineNo">589</span> for (int server = 0; server < numServers; server++) {<a name="line.589"></a> |
| <span class="sourceLineNo">590</span> // Aggregate per-rack locality<a name="line.590"></a> |
| <span class="sourceLineNo">591</span> float locality = getLocalityOfRegion(region, server);<a name="line.591"></a> |
| <span class="sourceLineNo">592</span> int rack = serverIndexToRackIndex[server];<a name="line.592"></a> |
| <span class="sourceLineNo">593</span> int numServersInRack = serversPerRack[rack].length;<a name="line.593"></a> |
| <span class="sourceLineNo">594</span> rackLocalities[region][rack] += locality / numServersInRack;<a name="line.594"></a> |
| <span class="sourceLineNo">595</span><a name="line.595"></a> |
| <span class="sourceLineNo">596</span> if (locality > bestLocalityForRegion) {<a name="line.596"></a> |
| <span class="sourceLineNo">597</span> serverWithBestLocality = server;<a name="line.597"></a> |
| <span class="sourceLineNo">598</span> bestLocalityForRegion = locality;<a name="line.598"></a> |
| <span class="sourceLineNo">599</span> }<a name="line.599"></a> |
| <span class="sourceLineNo">600</span> }<a name="line.600"></a> |
| <span class="sourceLineNo">601</span> regionsToMostLocalEntities[LocalityType.SERVER.ordinal()][region] = serverWithBestLocality;<a name="line.601"></a> |
| <span class="sourceLineNo">602</span><a name="line.602"></a> |
| <span class="sourceLineNo">603</span> // Find most local rack per region<a name="line.603"></a> |
| <span class="sourceLineNo">604</span> int rackWithBestLocality = 0;<a name="line.604"></a> |
| <span class="sourceLineNo">605</span> float bestRackLocalityForRegion = 0.0f;<a name="line.605"></a> |
| <span class="sourceLineNo">606</span> for (int rack = 0; rack < numRacks; rack++) {<a name="line.606"></a> |
| <span class="sourceLineNo">607</span> float rackLocality = rackLocalities[region][rack];<a name="line.607"></a> |
| <span class="sourceLineNo">608</span> if (rackLocality > bestRackLocalityForRegion) {<a name="line.608"></a> |
| <span class="sourceLineNo">609</span> bestRackLocalityForRegion = rackLocality;<a name="line.609"></a> |
| <span class="sourceLineNo">610</span> rackWithBestLocality = rack;<a name="line.610"></a> |
| <span class="sourceLineNo">611</span> }<a name="line.611"></a> |
| <span class="sourceLineNo">612</span> }<a name="line.612"></a> |
| <span class="sourceLineNo">613</span> regionsToMostLocalEntities[LocalityType.RACK.ordinal()][region] = rackWithBestLocality;<a name="line.613"></a> |
| <span class="sourceLineNo">614</span> }<a name="line.614"></a> |
| <span class="sourceLineNo">615</span><a name="line.615"></a> |
| <span class="sourceLineNo">616</span> }<a name="line.616"></a> |
| <span class="sourceLineNo">617</span><a name="line.617"></a> |
| <span class="sourceLineNo">618</span> /**<a name="line.618"></a> |
| <span class="sourceLineNo">619</span> * Maps region index to rack index<a name="line.619"></a> |
| <span class="sourceLineNo">620</span> */<a name="line.620"></a> |
| <span class="sourceLineNo">621</span> public int getRackForRegion(int region) {<a name="line.621"></a> |
| <span class="sourceLineNo">622</span> return serverIndexToRackIndex[regionIndexToServerIndex[region]];<a name="line.622"></a> |
| <span class="sourceLineNo">623</span> }<a name="line.623"></a> |
| <span class="sourceLineNo">624</span><a name="line.624"></a> |
| <span class="sourceLineNo">625</span> enum LocalityType {<a name="line.625"></a> |
| <span class="sourceLineNo">626</span> SERVER,<a name="line.626"></a> |
| <span class="sourceLineNo">627</span> RACK<a name="line.627"></a> |
| <span class="sourceLineNo">628</span> }<a name="line.628"></a> |
| <span class="sourceLineNo">629</span><a name="line.629"></a> |
| <span class="sourceLineNo">630</span> /** An action to move or swap a region */<a name="line.630"></a> |
| <span class="sourceLineNo">631</span> public static class Action {<a name="line.631"></a> |
| <span class="sourceLineNo">632</span> public enum Type {<a name="line.632"></a> |
| <span class="sourceLineNo">633</span> ASSIGN_REGION,<a name="line.633"></a> |
| <span class="sourceLineNo">634</span> MOVE_REGION,<a name="line.634"></a> |
| <span class="sourceLineNo">635</span> SWAP_REGIONS,<a name="line.635"></a> |
| <span class="sourceLineNo">636</span> NULL,<a name="line.636"></a> |
| <span class="sourceLineNo">637</span> }<a name="line.637"></a> |
| <span class="sourceLineNo">638</span><a name="line.638"></a> |
| <span class="sourceLineNo">639</span> public Type type;<a name="line.639"></a> |
| <span class="sourceLineNo">640</span> public Action (Type type) {this.type = type;}<a name="line.640"></a> |
| <span class="sourceLineNo">641</span> /** Returns an Action which would undo this action */<a name="line.641"></a> |
| <span class="sourceLineNo">642</span> public Action undoAction() { return this; }<a name="line.642"></a> |
| <span class="sourceLineNo">643</span> @Override<a name="line.643"></a> |
| <span class="sourceLineNo">644</span> public String toString() { return type + ":";}<a name="line.644"></a> |
| <span class="sourceLineNo">645</span> }<a name="line.645"></a> |
| <span class="sourceLineNo">646</span><a name="line.646"></a> |
| <span class="sourceLineNo">647</span> public static class AssignRegionAction extends Action {<a name="line.647"></a> |
| <span class="sourceLineNo">648</span> public int region;<a name="line.648"></a> |
| <span class="sourceLineNo">649</span> public int server;<a name="line.649"></a> |
| <span class="sourceLineNo">650</span> public AssignRegionAction(int region, int server) {<a name="line.650"></a> |
| <span class="sourceLineNo">651</span> super(Type.ASSIGN_REGION);<a name="line.651"></a> |
| <span class="sourceLineNo">652</span> this.region = region;<a name="line.652"></a> |
| <span class="sourceLineNo">653</span> this.server = server;<a name="line.653"></a> |
| <span class="sourceLineNo">654</span> }<a name="line.654"></a> |
| <span class="sourceLineNo">655</span> @Override<a name="line.655"></a> |
| <span class="sourceLineNo">656</span> public Action undoAction() {<a name="line.656"></a> |
| <span class="sourceLineNo">657</span> // TODO implement this. This action is not being used by the StochasticLB for now<a name="line.657"></a> |
| <span class="sourceLineNo">658</span> // in case it uses it, we should implement this function.<a name="line.658"></a> |
| <span class="sourceLineNo">659</span> throw new NotImplementedException(HConstants.NOT_IMPLEMENTED);<a name="line.659"></a> |
| <span class="sourceLineNo">660</span> }<a name="line.660"></a> |
| <span class="sourceLineNo">661</span> @Override<a name="line.661"></a> |
| <span class="sourceLineNo">662</span> public String toString() {<a name="line.662"></a> |
| <span class="sourceLineNo">663</span> return type + ": " + region + ":" + server;<a name="line.663"></a> |
| <span class="sourceLineNo">664</span> }<a name="line.664"></a> |
| <span class="sourceLineNo">665</span> }<a name="line.665"></a> |
| <span class="sourceLineNo">666</span><a name="line.666"></a> |
| <span class="sourceLineNo">667</span> public static class MoveRegionAction extends Action {<a name="line.667"></a> |
| <span class="sourceLineNo">668</span> public int region;<a name="line.668"></a> |
| <span class="sourceLineNo">669</span> public int fromServer;<a name="line.669"></a> |
| <span class="sourceLineNo">670</span> public int toServer;<a name="line.670"></a> |
| <span class="sourceLineNo">671</span><a name="line.671"></a> |
| <span class="sourceLineNo">672</span> public MoveRegionAction(int region, int fromServer, int toServer) {<a name="line.672"></a> |
| <span class="sourceLineNo">673</span> super(Type.MOVE_REGION);<a name="line.673"></a> |
| <span class="sourceLineNo">674</span> this.fromServer = fromServer;<a name="line.674"></a> |
| <span class="sourceLineNo">675</span> this.region = region;<a name="line.675"></a> |
| <span class="sourceLineNo">676</span> this.toServer = toServer;<a name="line.676"></a> |
| <span class="sourceLineNo">677</span> }<a name="line.677"></a> |
| <span class="sourceLineNo">678</span> @Override<a name="line.678"></a> |
| <span class="sourceLineNo">679</span> public Action undoAction() {<a name="line.679"></a> |
| <span class="sourceLineNo">680</span> return new MoveRegionAction (region, toServer, fromServer);<a name="line.680"></a> |
| <span class="sourceLineNo">681</span> }<a name="line.681"></a> |
| <span class="sourceLineNo">682</span> @Override<a name="line.682"></a> |
| <span class="sourceLineNo">683</span> public String toString() {<a name="line.683"></a> |
| <span class="sourceLineNo">684</span> return type + ": " + region + ":" + fromServer + " -> " + toServer;<a name="line.684"></a> |
| <span class="sourceLineNo">685</span> }<a name="line.685"></a> |
| <span class="sourceLineNo">686</span> }<a name="line.686"></a> |
| <span class="sourceLineNo">687</span><a name="line.687"></a> |
| <span class="sourceLineNo">688</span> public static class SwapRegionsAction extends Action {<a name="line.688"></a> |
| <span class="sourceLineNo">689</span> public int fromServer;<a name="line.689"></a> |
| <span class="sourceLineNo">690</span> public int fromRegion;<a name="line.690"></a> |
| <span class="sourceLineNo">691</span> public int toServer;<a name="line.691"></a> |
| <span class="sourceLineNo">692</span> public int toRegion;<a name="line.692"></a> |
| <span class="sourceLineNo">693</span> public SwapRegionsAction(int fromServer, int fromRegion, int toServer, int toRegion) {<a name="line.693"></a> |
| <span class="sourceLineNo">694</span> super(Type.SWAP_REGIONS);<a name="line.694"></a> |
| <span class="sourceLineNo">695</span> this.fromServer = fromServer;<a name="line.695"></a> |
| <span class="sourceLineNo">696</span> this.fromRegion = fromRegion;<a name="line.696"></a> |
| <span class="sourceLineNo">697</span> this.toServer = toServer;<a name="line.697"></a> |
| <span class="sourceLineNo">698</span> this.toRegion = toRegion;<a name="line.698"></a> |
| <span class="sourceLineNo">699</span> }<a name="line.699"></a> |
| <span class="sourceLineNo">700</span> @Override<a name="line.700"></a> |
| <span class="sourceLineNo">701</span> public Action undoAction() {<a name="line.701"></a> |
| <span class="sourceLineNo">702</span> return new SwapRegionsAction (fromServer, toRegion, toServer, fromRegion);<a name="line.702"></a> |
| <span class="sourceLineNo">703</span> }<a name="line.703"></a> |
| <span class="sourceLineNo">704</span> @Override<a name="line.704"></a> |
| <span class="sourceLineNo">705</span> public String toString() {<a name="line.705"></a> |
| <span class="sourceLineNo">706</span> return type + ": " + fromRegion + ":" + fromServer + " <-> " + toRegion + ":" + toServer;<a name="line.706"></a> |
| <span class="sourceLineNo">707</span> }<a name="line.707"></a> |
| <span class="sourceLineNo">708</span> }<a name="line.708"></a> |
| <span class="sourceLineNo">709</span><a name="line.709"></a> |
| <span class="sourceLineNo">710</span> @edu.umd.cs.findbugs.annotations.SuppressWarnings(value="NM_FIELD_NAMING_CONVENTION",<a name="line.710"></a> |
| <span class="sourceLineNo">711</span> justification="Mistake. Too disruptive to change now")<a name="line.711"></a> |
| <span class="sourceLineNo">712</span> public static final Action NullAction = new Action(Type.NULL);<a name="line.712"></a> |
| <span class="sourceLineNo">713</span><a name="line.713"></a> |
| <span class="sourceLineNo">714</span> public void doAction(Action action) {<a name="line.714"></a> |
| <span class="sourceLineNo">715</span> switch (action.type) {<a name="line.715"></a> |
| <span class="sourceLineNo">716</span> case NULL: break;<a name="line.716"></a> |
| <span class="sourceLineNo">717</span> case ASSIGN_REGION:<a name="line.717"></a> |
| <span class="sourceLineNo">718</span> // FindBugs: Having the assert quietens FB BC_UNCONFIRMED_CAST warnings<a name="line.718"></a> |
| <span class="sourceLineNo">719</span> assert action instanceof AssignRegionAction: action.getClass();<a name="line.719"></a> |
| <span class="sourceLineNo">720</span> AssignRegionAction ar = (AssignRegionAction) action;<a name="line.720"></a> |
| <span class="sourceLineNo">721</span> regionsPerServer[ar.server] = addRegion(regionsPerServer[ar.server], ar.region);<a name="line.721"></a> |
| <span class="sourceLineNo">722</span> regionMoved(ar.region, -1, ar.server);<a name="line.722"></a> |
| <span class="sourceLineNo">723</span> break;<a name="line.723"></a> |
| <span class="sourceLineNo">724</span> case MOVE_REGION:<a name="line.724"></a> |
| <span class="sourceLineNo">725</span> assert action instanceof MoveRegionAction: action.getClass();<a name="line.725"></a> |
| <span class="sourceLineNo">726</span> MoveRegionAction mra = (MoveRegionAction) action;<a name="line.726"></a> |
| <span class="sourceLineNo">727</span> regionsPerServer[mra.fromServer] = removeRegion(regionsPerServer[mra.fromServer], mra.region);<a name="line.727"></a> |
| <span class="sourceLineNo">728</span> regionsPerServer[mra.toServer] = addRegion(regionsPerServer[mra.toServer], mra.region);<a name="line.728"></a> |
| <span class="sourceLineNo">729</span> regionMoved(mra.region, mra.fromServer, mra.toServer);<a name="line.729"></a> |
| <span class="sourceLineNo">730</span> break;<a name="line.730"></a> |
| <span class="sourceLineNo">731</span> case SWAP_REGIONS:<a name="line.731"></a> |
| <span class="sourceLineNo">732</span> assert action instanceof SwapRegionsAction: action.getClass();<a name="line.732"></a> |
| <span class="sourceLineNo">733</span> SwapRegionsAction a = (SwapRegionsAction) action;<a name="line.733"></a> |
| <span class="sourceLineNo">734</span> regionsPerServer[a.fromServer] = replaceRegion(regionsPerServer[a.fromServer], a.fromRegion, a.toRegion);<a name="line.734"></a> |
| <span class="sourceLineNo">735</span> regionsPerServer[a.toServer] = replaceRegion(regionsPerServer[a.toServer], a.toRegion, a.fromRegion);<a name="line.735"></a> |
| <span class="sourceLineNo">736</span> regionMoved(a.fromRegion, a.fromServer, a.toServer);<a name="line.736"></a> |
| <span class="sourceLineNo">737</span> regionMoved(a.toRegion, a.toServer, a.fromServer);<a name="line.737"></a> |
| <span class="sourceLineNo">738</span> break;<a name="line.738"></a> |
| <span class="sourceLineNo">739</span> default:<a name="line.739"></a> |
| <span class="sourceLineNo">740</span> throw new RuntimeException("Uknown action:" + action.type);<a name="line.740"></a> |
| <span class="sourceLineNo">741</span> }<a name="line.741"></a> |
| <span class="sourceLineNo">742</span> }<a name="line.742"></a> |
| <span class="sourceLineNo">743</span><a name="line.743"></a> |
| <span class="sourceLineNo">744</span> /**<a name="line.744"></a> |
| <span class="sourceLineNo">745</span> * Return true if the placement of region on server would lower the availability<a name="line.745"></a> |
| <span class="sourceLineNo">746</span> * of the region in question<a name="line.746"></a> |
| <span class="sourceLineNo">747</span> * @return true or false<a name="line.747"></a> |
| <span class="sourceLineNo">748</span> */<a name="line.748"></a> |
| <span class="sourceLineNo">749</span> boolean wouldLowerAvailability(RegionInfo regionInfo, ServerName serverName) {<a name="line.749"></a> |
| <span class="sourceLineNo">750</span> if (!serversToIndex.containsKey(serverName.getAddress())) {<a name="line.750"></a> |
| <span class="sourceLineNo">751</span> return false; // safeguard against race between cluster.servers and servers from LB method args<a name="line.751"></a> |
| <span class="sourceLineNo">752</span> }<a name="line.752"></a> |
| <span class="sourceLineNo">753</span> int server = serversToIndex.get(serverName.getAddress());<a name="line.753"></a> |
| <span class="sourceLineNo">754</span> int region = regionsToIndex.get(regionInfo);<a name="line.754"></a> |
| <span class="sourceLineNo">755</span><a name="line.755"></a> |
| <span class="sourceLineNo">756</span> // Region replicas for same region should better assign to different servers<a name="line.756"></a> |
| <span class="sourceLineNo">757</span> for (int i : regionsPerServer[server]) {<a name="line.757"></a> |
| <span class="sourceLineNo">758</span> RegionInfo otherRegionInfo = regions[i];<a name="line.758"></a> |
| <span class="sourceLineNo">759</span> if (RegionReplicaUtil.isReplicasForSameRegion(regionInfo, otherRegionInfo)) {<a name="line.759"></a> |
| <span class="sourceLineNo">760</span> return true;<a name="line.760"></a> |
| <span class="sourceLineNo">761</span> }<a name="line.761"></a> |
| <span class="sourceLineNo">762</span> }<a name="line.762"></a> |
| <span class="sourceLineNo">763</span><a name="line.763"></a> |
| <span class="sourceLineNo">764</span> int primary = regionIndexToPrimaryIndex[region];<a name="line.764"></a> |
| <span class="sourceLineNo">765</span> if (primary == -1) {<a name="line.765"></a> |
| <span class="sourceLineNo">766</span> return false;<a name="line.766"></a> |
| <span class="sourceLineNo">767</span> }<a name="line.767"></a> |
| <span class="sourceLineNo">768</span> // there is a subset relation for server < host < rack<a name="line.768"></a> |
| <span class="sourceLineNo">769</span> // check server first<a name="line.769"></a> |
| <span class="sourceLineNo">770</span> if (contains(primariesOfRegionsPerServer[server], primary)) {<a name="line.770"></a> |
| <span class="sourceLineNo">771</span> // check for whether there are other servers that we can place this region<a name="line.771"></a> |
| <span class="sourceLineNo">772</span> for (int i = 0; i < primariesOfRegionsPerServer.length; i++) {<a name="line.772"></a> |
| <span class="sourceLineNo">773</span> if (i != server && !contains(primariesOfRegionsPerServer[i], primary)) {<a name="line.773"></a> |
| <span class="sourceLineNo">774</span> return true; // meaning there is a better server<a name="line.774"></a> |
| <span class="sourceLineNo">775</span> }<a name="line.775"></a> |
| <span class="sourceLineNo">776</span> }<a name="line.776"></a> |
| <span class="sourceLineNo">777</span> return false; // there is not a better server to place this<a name="line.777"></a> |
| <span class="sourceLineNo">778</span> }<a name="line.778"></a> |
| <span class="sourceLineNo">779</span><a name="line.779"></a> |
| <span class="sourceLineNo">780</span> // check host<a name="line.780"></a> |
| <span class="sourceLineNo">781</span> if (multiServersPerHost) {<a name="line.781"></a> |
| <span class="sourceLineNo">782</span> // these arrays would only be allocated if we have more than one server per host<a name="line.782"></a> |
| <span class="sourceLineNo">783</span> int host = serverIndexToHostIndex[server];<a name="line.783"></a> |
| <span class="sourceLineNo">784</span> if (contains(primariesOfRegionsPerHost[host], primary)) {<a name="line.784"></a> |
| <span class="sourceLineNo">785</span> // check for whether there are other hosts that we can place this region<a name="line.785"></a> |
| <span class="sourceLineNo">786</span> for (int i = 0; i < primariesOfRegionsPerHost.length; i++) {<a name="line.786"></a> |
| <span class="sourceLineNo">787</span> if (i != host && !contains(primariesOfRegionsPerHost[i], primary)) {<a name="line.787"></a> |
| <span class="sourceLineNo">788</span> return true; // meaning there is a better host<a name="line.788"></a> |
| <span class="sourceLineNo">789</span> }<a name="line.789"></a> |
| <span class="sourceLineNo">790</span> }<a name="line.790"></a> |
| <span class="sourceLineNo">791</span> return false; // there is not a better host to place this<a name="line.791"></a> |
| <span class="sourceLineNo">792</span> }<a name="line.792"></a> |
| <span class="sourceLineNo">793</span> }<a name="line.793"></a> |
| <span class="sourceLineNo">794</span><a name="line.794"></a> |
| <span class="sourceLineNo">795</span> // check rack<a name="line.795"></a> |
| <span class="sourceLineNo">796</span> if (numRacks > 1) {<a name="line.796"></a> |
| <span class="sourceLineNo">797</span> int rack = serverIndexToRackIndex[server];<a name="line.797"></a> |
| <span class="sourceLineNo">798</span> if (contains(primariesOfRegionsPerRack[rack], primary)) {<a name="line.798"></a> |
| <span class="sourceLineNo">799</span> // check for whether there are other racks that we can place this region<a name="line.799"></a> |
| <span class="sourceLineNo">800</span> for (int i = 0; i < primariesOfRegionsPerRack.length; i++) {<a name="line.800"></a> |
| <span class="sourceLineNo">801</span> if (i != rack && !contains(primariesOfRegionsPerRack[i], primary)) {<a name="line.801"></a> |
| <span class="sourceLineNo">802</span> return true; // meaning there is a better rack<a name="line.802"></a> |
| <span class="sourceLineNo">803</span> }<a name="line.803"></a> |
| <span class="sourceLineNo">804</span> }<a name="line.804"></a> |
| <span class="sourceLineNo">805</span> return false; // there is not a better rack to place this<a name="line.805"></a> |
| <span class="sourceLineNo">806</span> }<a name="line.806"></a> |
| <span class="sourceLineNo">807</span> }<a name="line.807"></a> |
| <span class="sourceLineNo">808</span><a name="line.808"></a> |
| <span class="sourceLineNo">809</span> return false;<a name="line.809"></a> |
| <span class="sourceLineNo">810</span> }<a name="line.810"></a> |
| <span class="sourceLineNo">811</span><a name="line.811"></a> |
| <span class="sourceLineNo">812</span> void doAssignRegion(RegionInfo regionInfo, ServerName serverName) {<a name="line.812"></a> |
| <span class="sourceLineNo">813</span> if (!serversToIndex.containsKey(serverName.getAddress())) {<a name="line.813"></a> |
| <span class="sourceLineNo">814</span> return;<a name="line.814"></a> |
| <span class="sourceLineNo">815</span> }<a name="line.815"></a> |
| <span class="sourceLineNo">816</span> int server = serversToIndex.get(serverName.getAddress());<a name="line.816"></a> |
| <span class="sourceLineNo">817</span> int region = regionsToIndex.get(regionInfo);<a name="line.817"></a> |
| <span class="sourceLineNo">818</span> doAction(new AssignRegionAction(region, server));<a name="line.818"></a> |
| <span class="sourceLineNo">819</span> }<a name="line.819"></a> |
| <span class="sourceLineNo">820</span><a name="line.820"></a> |
| <span class="sourceLineNo">821</span> void regionMoved(int region, int oldServer, int newServer) {<a name="line.821"></a> |
| <span class="sourceLineNo">822</span> regionIndexToServerIndex[region] = newServer;<a name="line.822"></a> |
| <span class="sourceLineNo">823</span> if (initialRegionIndexToServerIndex[region] == newServer) {<a name="line.823"></a> |
| <span class="sourceLineNo">824</span> numMovedRegions--; //region moved back to original location<a name="line.824"></a> |
| <span class="sourceLineNo">825</span> } else if (oldServer >= 0 && initialRegionIndexToServerIndex[region] == oldServer) {<a name="line.825"></a> |
| <span class="sourceLineNo">826</span> numMovedRegions++; //region moved from original location<a name="line.826"></a> |
| <span class="sourceLineNo">827</span> }<a name="line.827"></a> |
| <span class="sourceLineNo">828</span> int tableIndex = regionIndexToTableIndex[region];<a name="line.828"></a> |
| <span class="sourceLineNo">829</span> if (oldServer >= 0) {<a name="line.829"></a> |
| <span class="sourceLineNo">830</span> numRegionsPerServerPerTable[oldServer][tableIndex]--;<a name="line.830"></a> |
| <span class="sourceLineNo">831</span> }<a name="line.831"></a> |
| <span class="sourceLineNo">832</span> numRegionsPerServerPerTable[newServer][tableIndex]++;<a name="line.832"></a> |
| <span class="sourceLineNo">833</span><a name="line.833"></a> |
| <span class="sourceLineNo">834</span> //check whether this caused maxRegionsPerTable in the new Server to be updated<a name="line.834"></a> |
| <span class="sourceLineNo">835</span> if (numRegionsPerServerPerTable[newServer][tableIndex] > numMaxRegionsPerTable[tableIndex]) {<a name="line.835"></a> |
| <span class="sourceLineNo">836</span> numMaxRegionsPerTable[tableIndex] = numRegionsPerServerPerTable[newServer][tableIndex];<a name="line.836"></a> |
| <span class="sourceLineNo">837</span> } else if (oldServer >= 0 && (numRegionsPerServerPerTable[oldServer][tableIndex] + 1)<a name="line.837"></a> |
| <span class="sourceLineNo">838</span> == numMaxRegionsPerTable[tableIndex]) {<a name="line.838"></a> |
| <span class="sourceLineNo">839</span> //recompute maxRegionsPerTable since the previous value was coming from the old server<a name="line.839"></a> |
| <span class="sourceLineNo">840</span> numMaxRegionsPerTable[tableIndex] = 0;<a name="line.840"></a> |
| <span class="sourceLineNo">841</span> for (int[] aNumRegionsPerServerPerTable : numRegionsPerServerPerTable) {<a name="line.841"></a> |
| <span class="sourceLineNo">842</span> if (aNumRegionsPerServerPerTable[tableIndex] > numMaxRegionsPerTable[tableIndex]) {<a name="line.842"></a> |
| <span class="sourceLineNo">843</span> numMaxRegionsPerTable[tableIndex] = aNumRegionsPerServerPerTable[tableIndex];<a name="line.843"></a> |
| <span class="sourceLineNo">844</span> }<a name="line.844"></a> |
| <span class="sourceLineNo">845</span> }<a name="line.845"></a> |
| <span class="sourceLineNo">846</span> }<a name="line.846"></a> |
| <span class="sourceLineNo">847</span><a name="line.847"></a> |
| <span class="sourceLineNo">848</span> // update for servers<a name="line.848"></a> |
| <span class="sourceLineNo">849</span> int primary = regionIndexToPrimaryIndex[region];<a name="line.849"></a> |
| <span class="sourceLineNo">850</span> if (oldServer >= 0) {<a name="line.850"></a> |
| <span class="sourceLineNo">851</span> primariesOfRegionsPerServer[oldServer] = removeRegion(<a name="line.851"></a> |
| <span class="sourceLineNo">852</span> primariesOfRegionsPerServer[oldServer], primary);<a name="line.852"></a> |
| <span class="sourceLineNo">853</span> }<a name="line.853"></a> |
| <span class="sourceLineNo">854</span> primariesOfRegionsPerServer[newServer] = addRegionSorted(<a name="line.854"></a> |
| <span class="sourceLineNo">855</span> primariesOfRegionsPerServer[newServer], primary);<a name="line.855"></a> |
| <span class="sourceLineNo">856</span><a name="line.856"></a> |
| <span class="sourceLineNo">857</span> // update for hosts<a name="line.857"></a> |
| <span class="sourceLineNo">858</span> if (multiServersPerHost) {<a name="line.858"></a> |
| <span class="sourceLineNo">859</span> int oldHost = oldServer >= 0 ? serverIndexToHostIndex[oldServer] : -1;<a name="line.859"></a> |
| <span class="sourceLineNo">860</span> int newHost = serverIndexToHostIndex[newServer];<a name="line.860"></a> |
| <span class="sourceLineNo">861</span> if (newHost != oldHost) {<a name="line.861"></a> |
| <span class="sourceLineNo">862</span> regionsPerHost[newHost] = addRegion(regionsPerHost[newHost], region);<a name="line.862"></a> |
| <span class="sourceLineNo">863</span> primariesOfRegionsPerHost[newHost] = addRegionSorted(primariesOfRegionsPerHost[newHost], primary);<a name="line.863"></a> |
| <span class="sourceLineNo">864</span> if (oldHost >= 0) {<a name="line.864"></a> |
| <span class="sourceLineNo">865</span> regionsPerHost[oldHost] = removeRegion(regionsPerHost[oldHost], region);<a name="line.865"></a> |
| <span class="sourceLineNo">866</span> primariesOfRegionsPerHost[oldHost] = removeRegion(<a name="line.866"></a> |
| <span class="sourceLineNo">867</span> primariesOfRegionsPerHost[oldHost], primary); // will still be sorted<a name="line.867"></a> |
| <span class="sourceLineNo">868</span> }<a name="line.868"></a> |
| <span class="sourceLineNo">869</span> }<a name="line.869"></a> |
| <span class="sourceLineNo">870</span> }<a name="line.870"></a> |
| <span class="sourceLineNo">871</span><a name="line.871"></a> |
| <span class="sourceLineNo">872</span> // update for racks<a name="line.872"></a> |
| <span class="sourceLineNo">873</span> if (numRacks > 1) {<a name="line.873"></a> |
| <span class="sourceLineNo">874</span> int oldRack = oldServer >= 0 ? serverIndexToRackIndex[oldServer] : -1;<a name="line.874"></a> |
| <span class="sourceLineNo">875</span> int newRack = serverIndexToRackIndex[newServer];<a name="line.875"></a> |
| <span class="sourceLineNo">876</span> if (newRack != oldRack) {<a name="line.876"></a> |
| <span class="sourceLineNo">877</span> regionsPerRack[newRack] = addRegion(regionsPerRack[newRack], region);<a name="line.877"></a> |
| <span class="sourceLineNo">878</span> primariesOfRegionsPerRack[newRack] = addRegionSorted(primariesOfRegionsPerRack[newRack], primary);<a name="line.878"></a> |
| <span class="sourceLineNo">879</span> if (oldRack >= 0) {<a name="line.879"></a> |
| <span class="sourceLineNo">880</span> regionsPerRack[oldRack] = removeRegion(regionsPerRack[oldRack], region);<a name="line.880"></a> |
| <span class="sourceLineNo">881</span> primariesOfRegionsPerRack[oldRack] = removeRegion(<a name="line.881"></a> |
| <span class="sourceLineNo">882</span> primariesOfRegionsPerRack[oldRack], primary); // will still be sorted<a name="line.882"></a> |
| <span class="sourceLineNo">883</span> }<a name="line.883"></a> |
| <span class="sourceLineNo">884</span> }<a name="line.884"></a> |
| <span class="sourceLineNo">885</span> }<a name="line.885"></a> |
| <span class="sourceLineNo">886</span> }<a name="line.886"></a> |
| <span class="sourceLineNo">887</span><a name="line.887"></a> |
| <span class="sourceLineNo">888</span> int[] removeRegion(int[] regions, int regionIndex) {<a name="line.888"></a> |
| <span class="sourceLineNo">889</span> //TODO: this maybe costly. Consider using linked lists<a name="line.889"></a> |
| <span class="sourceLineNo">890</span> int[] newRegions = new int[regions.length - 1];<a name="line.890"></a> |
| <span class="sourceLineNo">891</span> int i = 0;<a name="line.891"></a> |
| <span class="sourceLineNo">892</span> for (i = 0; i < regions.length; i++) {<a name="line.892"></a> |
| <span class="sourceLineNo">893</span> if (regions[i] == regionIndex) {<a name="line.893"></a> |
| <span class="sourceLineNo">894</span> break;<a name="line.894"></a> |
| <span class="sourceLineNo">895</span> }<a name="line.895"></a> |
| <span class="sourceLineNo">896</span> newRegions[i] = regions[i];<a name="line.896"></a> |
| <span class="sourceLineNo">897</span> }<a name="line.897"></a> |
| <span class="sourceLineNo">898</span> System.arraycopy(regions, i+1, newRegions, i, newRegions.length - i);<a name="line.898"></a> |
| <span class="sourceLineNo">899</span> return newRegions;<a name="line.899"></a> |
| <span class="sourceLineNo">900</span> }<a name="line.900"></a> |
| <span class="sourceLineNo">901</span><a name="line.901"></a> |
| <span class="sourceLineNo">902</span> int[] addRegion(int[] regions, int regionIndex) {<a name="line.902"></a> |
| <span class="sourceLineNo">903</span> int[] newRegions = new int[regions.length + 1];<a name="line.903"></a> |
| <span class="sourceLineNo">904</span> System.arraycopy(regions, 0, newRegions, 0, regions.length);<a name="line.904"></a> |
| <span class="sourceLineNo">905</span> newRegions[newRegions.length - 1] = regionIndex;<a name="line.905"></a> |
| <span class="sourceLineNo">906</span> return newRegions;<a name="line.906"></a> |
| <span class="sourceLineNo">907</span> }<a name="line.907"></a> |
| <span class="sourceLineNo">908</span><a name="line.908"></a> |
| <span class="sourceLineNo">909</span> int[] addRegionSorted(int[] regions, int regionIndex) {<a name="line.909"></a> |
| <span class="sourceLineNo">910</span> int[] newRegions = new int[regions.length + 1];<a name="line.910"></a> |
| <span class="sourceLineNo">911</span> int i = 0;<a name="line.911"></a> |
| <span class="sourceLineNo">912</span> for (i = 0; i < regions.length; i++) { // find the index to insert<a name="line.912"></a> |
| <span class="sourceLineNo">913</span> if (regions[i] > regionIndex) {<a name="line.913"></a> |
| <span class="sourceLineNo">914</span> break;<a name="line.914"></a> |
| <span class="sourceLineNo">915</span> }<a name="line.915"></a> |
| <span class="sourceLineNo">916</span> }<a name="line.916"></a> |
| <span class="sourceLineNo">917</span> System.arraycopy(regions, 0, newRegions, 0, i); // copy first half<a name="line.917"></a> |
| <span class="sourceLineNo">918</span> System.arraycopy(regions, i, newRegions, i+1, regions.length - i); // copy second half<a name="line.918"></a> |
| <span class="sourceLineNo">919</span> newRegions[i] = regionIndex;<a name="line.919"></a> |
| <span class="sourceLineNo">920</span><a name="line.920"></a> |
| <span class="sourceLineNo">921</span> return newRegions;<a name="line.921"></a> |
| <span class="sourceLineNo">922</span> }<a name="line.922"></a> |
| <span class="sourceLineNo">923</span><a name="line.923"></a> |
| <span class="sourceLineNo">924</span> int[] replaceRegion(int[] regions, int regionIndex, int newRegionIndex) {<a name="line.924"></a> |
| <span class="sourceLineNo">925</span> int i = 0;<a name="line.925"></a> |
| <span class="sourceLineNo">926</span> for (i = 0; i < regions.length; i++) {<a name="line.926"></a> |
| <span class="sourceLineNo">927</span> if (regions[i] == regionIndex) {<a name="line.927"></a> |
| <span class="sourceLineNo">928</span> regions[i] = newRegionIndex;<a name="line.928"></a> |
| <span class="sourceLineNo">929</span> break;<a name="line.929"></a> |
| <span class="sourceLineNo">930</span> }<a name="line.930"></a> |
| <span class="sourceLineNo">931</span> }<a name="line.931"></a> |
| <span class="sourceLineNo">932</span> return regions;<a name="line.932"></a> |
| <span class="sourceLineNo">933</span> }<a name="line.933"></a> |
| <span class="sourceLineNo">934</span><a name="line.934"></a> |
| <span class="sourceLineNo">935</span> void sortServersByRegionCount() {<a name="line.935"></a> |
| <span class="sourceLineNo">936</span> Arrays.sort(serverIndicesSortedByRegionCount, numRegionsComparator);<a name="line.936"></a> |
| <span class="sourceLineNo">937</span> }<a name="line.937"></a> |
| <span class="sourceLineNo">938</span><a name="line.938"></a> |
| <span class="sourceLineNo">939</span> int getNumRegions(int server) {<a name="line.939"></a> |
| <span class="sourceLineNo">940</span> return regionsPerServer[server].length;<a name="line.940"></a> |
| <span class="sourceLineNo">941</span> }<a name="line.941"></a> |
| <span class="sourceLineNo">942</span><a name="line.942"></a> |
| <span class="sourceLineNo">943</span> boolean contains(int[] arr, int val) {<a name="line.943"></a> |
| <span class="sourceLineNo">944</span> return Arrays.binarySearch(arr, val) >= 0;<a name="line.944"></a> |
| <span class="sourceLineNo">945</span> }<a name="line.945"></a> |
| <span class="sourceLineNo">946</span><a name="line.946"></a> |
| <span class="sourceLineNo">947</span> private Comparator<Integer> numRegionsComparator = Comparator.comparingInt(this::getNumRegions);<a name="line.947"></a> |
| <span class="sourceLineNo">948</span><a name="line.948"></a> |
| <span class="sourceLineNo">949</span> int getLowestLocalityRegionOnServer(int serverIndex) {<a name="line.949"></a> |
| <span class="sourceLineNo">950</span> if (regionFinder != null) {<a name="line.950"></a> |
| <span class="sourceLineNo">951</span> float lowestLocality = 1.0f;<a name="line.951"></a> |
| <span class="sourceLineNo">952</span> int lowestLocalityRegionIndex = -1;<a name="line.952"></a> |
| <span class="sourceLineNo">953</span> if (regionsPerServer[serverIndex].length == 0) {<a name="line.953"></a> |
| <span class="sourceLineNo">954</span> // No regions on that region server<a name="line.954"></a> |
| <span class="sourceLineNo">955</span> return -1;<a name="line.955"></a> |
| <span class="sourceLineNo">956</span> }<a name="line.956"></a> |
| <span class="sourceLineNo">957</span> for (int j = 0; j < regionsPerServer[serverIndex].length; j++) {<a name="line.957"></a> |
| <span class="sourceLineNo">958</span> int regionIndex = regionsPerServer[serverIndex][j];<a name="line.958"></a> |
| <span class="sourceLineNo">959</span> HDFSBlocksDistribution distribution = regionFinder<a name="line.959"></a> |
| <span class="sourceLineNo">960</span> .getBlockDistribution(regions[regionIndex]);<a name="line.960"></a> |
| <span class="sourceLineNo">961</span> float locality = distribution.getBlockLocalityIndex(servers[serverIndex].getHostname());<a name="line.961"></a> |
| <span class="sourceLineNo">962</span> // skip empty region<a name="line.962"></a> |
| <span class="sourceLineNo">963</span> if (distribution.getUniqueBlocksTotalWeight() == 0) {<a name="line.963"></a> |
| <span class="sourceLineNo">964</span> continue;<a name="line.964"></a> |
| <span class="sourceLineNo">965</span> }<a name="line.965"></a> |
| <span class="sourceLineNo">966</span> if (locality < lowestLocality) {<a name="line.966"></a> |
| <span class="sourceLineNo">967</span> lowestLocality = locality;<a name="line.967"></a> |
| <span class="sourceLineNo">968</span> lowestLocalityRegionIndex = j;<a name="line.968"></a> |
| <span class="sourceLineNo">969</span> }<a name="line.969"></a> |
| <span class="sourceLineNo">970</span> }<a name="line.970"></a> |
| <span class="sourceLineNo">971</span> if (lowestLocalityRegionIndex == -1) {<a name="line.971"></a> |
| <span class="sourceLineNo">972</span> return -1;<a name="line.972"></a> |
| <span class="sourceLineNo">973</span> }<a name="line.973"></a> |
| <span class="sourceLineNo">974</span> if (LOG.isTraceEnabled()) {<a name="line.974"></a> |
| <span class="sourceLineNo">975</span> LOG.trace("Lowest locality region is "<a name="line.975"></a> |
| <span class="sourceLineNo">976</span> + regions[regionsPerServer[serverIndex][lowestLocalityRegionIndex]]<a name="line.976"></a> |
| <span class="sourceLineNo">977</span> .getRegionNameAsString() + " with locality " + lowestLocality<a name="line.977"></a> |
| <span class="sourceLineNo">978</span> + " and its region server contains " + regionsPerServer[serverIndex].length<a name="line.978"></a> |
| <span class="sourceLineNo">979</span> + " regions");<a name="line.979"></a> |
| <span class="sourceLineNo">980</span> }<a name="line.980"></a> |
| <span class="sourceLineNo">981</span> return regionsPerServer[serverIndex][lowestLocalityRegionIndex];<a name="line.981"></a> |
| <span class="sourceLineNo">982</span> } else {<a name="line.982"></a> |
| <span class="sourceLineNo">983</span> return -1;<a name="line.983"></a> |
| <span class="sourceLineNo">984</span> }<a name="line.984"></a> |
| <span class="sourceLineNo">985</span> }<a name="line.985"></a> |
| <span class="sourceLineNo">986</span><a name="line.986"></a> |
| <span class="sourceLineNo">987</span> float getLocalityOfRegion(int region, int server) {<a name="line.987"></a> |
| <span class="sourceLineNo">988</span> if (regionFinder != null) {<a name="line.988"></a> |
| <span class="sourceLineNo">989</span> HDFSBlocksDistribution distribution = regionFinder.getBlockDistribution(regions[region]);<a name="line.989"></a> |
| <span class="sourceLineNo">990</span> return distribution.getBlockLocalityIndex(servers[server].getHostname());<a name="line.990"></a> |
| <span class="sourceLineNo">991</span> } else {<a name="line.991"></a> |
| <span class="sourceLineNo">992</span> return 0f;<a name="line.992"></a> |
| <span class="sourceLineNo">993</span> }<a name="line.993"></a> |
| <span class="sourceLineNo">994</span> }<a name="line.994"></a> |
| <span class="sourceLineNo">995</span><a name="line.995"></a> |
| <span class="sourceLineNo">996</span> protected void setNumRegions(int numRegions) {<a name="line.996"></a> |
| <span class="sourceLineNo">997</span> this.numRegions = numRegions;<a name="line.997"></a> |
| <span class="sourceLineNo">998</span> }<a name="line.998"></a> |
| <span class="sourceLineNo">999</span><a name="line.999"></a> |
| <span class="sourceLineNo">1000</span> protected void setNumMovedRegions(int numMovedRegions) {<a name="line.1000"></a> |
| <span class="sourceLineNo">1001</span> this.numMovedRegions = numMovedRegions;<a name="line.1001"></a> |
| <span class="sourceLineNo">1002</span> }<a name="line.1002"></a> |
| <span class="sourceLineNo">1003</span><a name="line.1003"></a> |
| <span class="sourceLineNo">1004</span> @edu.umd.cs.findbugs.annotations.SuppressWarnings(value="SBSC_USE_STRINGBUFFER_CONCATENATION",<a name="line.1004"></a> |
| <span class="sourceLineNo">1005</span> justification="Not important but should be fixed")<a name="line.1005"></a> |
| <span class="sourceLineNo">1006</span> @Override<a name="line.1006"></a> |
| <span class="sourceLineNo">1007</span> public String toString() {<a name="line.1007"></a> |
| <span class="sourceLineNo">1008</span> StringBuilder desc = new StringBuilder("Cluster={servers=[");<a name="line.1008"></a> |
| <span class="sourceLineNo">1009</span> for(ServerName sn:servers) {<a name="line.1009"></a> |
| <span class="sourceLineNo">1010</span> desc.append(sn.getAddress().toString()).append(", ");<a name="line.1010"></a> |
| <span class="sourceLineNo">1011</span> }<a name="line.1011"></a> |
| <span class="sourceLineNo">1012</span> desc.append("], serverIndicesSortedByRegionCount=")<a name="line.1012"></a> |
| <span class="sourceLineNo">1013</span> .append(Arrays.toString(serverIndicesSortedByRegionCount))<a name="line.1013"></a> |
| <span class="sourceLineNo">1014</span> .append(", regionsPerServer=").append(Arrays.deepToString(regionsPerServer));<a name="line.1014"></a> |
| <span class="sourceLineNo">1015</span><a name="line.1015"></a> |
| <span class="sourceLineNo">1016</span> desc.append(", numMaxRegionsPerTable=").append(Arrays.toString(numMaxRegionsPerTable))<a name="line.1016"></a> |
| <span class="sourceLineNo">1017</span> .append(", numRegions=").append(numRegions).append(", numServers=").append(numServers)<a name="line.1017"></a> |
| <span class="sourceLineNo">1018</span> .append(", numTables=").append(numTables).append(", numMovedRegions=")<a name="line.1018"></a> |
| <span class="sourceLineNo">1019</span> .append(numMovedRegions).append('}');<a name="line.1019"></a> |
| <span class="sourceLineNo">1020</span> return desc.toString();<a name="line.1020"></a> |
| <span class="sourceLineNo">1021</span> }<a name="line.1021"></a> |
| <span class="sourceLineNo">1022</span> }<a name="line.1022"></a> |
| <span class="sourceLineNo">1023</span><a name="line.1023"></a> |
| <span class="sourceLineNo">1024</span> // slop for regions<a name="line.1024"></a> |
| <span class="sourceLineNo">1025</span> protected float slop;<a name="line.1025"></a> |
| <span class="sourceLineNo">1026</span> // overallSlop to control simpleLoadBalancer's cluster level threshold<a name="line.1026"></a> |
| <span class="sourceLineNo">1027</span> protected float overallSlop;<a name="line.1027"></a> |
| <span class="sourceLineNo">1028</span> protected Configuration config = HBaseConfiguration.create();<a name="line.1028"></a> |
| <span class="sourceLineNo">1029</span> protected RackManager rackManager;<a name="line.1029"></a> |
| <span class="sourceLineNo">1030</span> private static final Random RANDOM = new Random(System.currentTimeMillis());<a name="line.1030"></a> |
| <span class="sourceLineNo">1031</span> private static final Logger LOG = LoggerFactory.getLogger(BaseLoadBalancer.class);<a name="line.1031"></a> |
| <span class="sourceLineNo">1032</span> protected MetricsBalancer metricsBalancer = null;<a name="line.1032"></a> |
| <span class="sourceLineNo">1033</span> protected ClusterMetrics clusterStatus = null;<a name="line.1033"></a> |
| <span class="sourceLineNo">1034</span> protected ServerName masterServerName;<a name="line.1034"></a> |
| <span class="sourceLineNo">1035</span> protected MasterServices services;<a name="line.1035"></a> |
| <span class="sourceLineNo">1036</span><a name="line.1036"></a> |
| <span class="sourceLineNo">1037</span> /**<a name="line.1037"></a> |
| <span class="sourceLineNo">1038</span> * @deprecated since 2.4.0, will be removed in 3.0.0.<a name="line.1038"></a> |
| <span class="sourceLineNo">1039</span> * @see <a href="https://issues.apache.org/jira/browse/HBASE-15549">HBASE-15549</a><a name="line.1039"></a> |
| <span class="sourceLineNo">1040</span> */<a name="line.1040"></a> |
| <span class="sourceLineNo">1041</span> @Deprecated<a name="line.1041"></a> |
| <span class="sourceLineNo">1042</span> protected boolean onlySystemTablesOnMaster;<a name="line.1042"></a> |
| <span class="sourceLineNo">1043</span><a name="line.1043"></a> |
| <span class="sourceLineNo">1044</span> protected boolean maintenanceMode;<a name="line.1044"></a> |
| <span class="sourceLineNo">1045</span><a name="line.1045"></a> |
| <span class="sourceLineNo">1046</span> @Override<a name="line.1046"></a> |
| <span class="sourceLineNo">1047</span> public void setConf(Configuration conf) {<a name="line.1047"></a> |
| <span class="sourceLineNo">1048</span> this.config = conf;<a name="line.1048"></a> |
| <span class="sourceLineNo">1049</span> setSlop(conf);<a name="line.1049"></a> |
| <span class="sourceLineNo">1050</span> if (slop < 0) slop = 0;<a name="line.1050"></a> |
| <span class="sourceLineNo">1051</span> else if (slop > 1) slop = 1;<a name="line.1051"></a> |
| <span class="sourceLineNo">1052</span><a name="line.1052"></a> |
| <span class="sourceLineNo">1053</span> if (overallSlop < 0) overallSlop = 0;<a name="line.1053"></a> |
| <span class="sourceLineNo">1054</span> else if (overallSlop > 1) overallSlop = 1;<a name="line.1054"></a> |
| <span class="sourceLineNo">1055</span><a name="line.1055"></a> |
| <span class="sourceLineNo">1056</span> this.onlySystemTablesOnMaster = LoadBalancer.isSystemTablesOnlyOnMaster(this.config);<a name="line.1056"></a> |
| <span class="sourceLineNo">1057</span><a name="line.1057"></a> |
| <span class="sourceLineNo">1058</span> this.rackManager = new RackManager(getConf());<a name="line.1058"></a> |
| <span class="sourceLineNo">1059</span> if (useRegionFinder) {<a name="line.1059"></a> |
| <span class="sourceLineNo">1060</span> regionFinder.setConf(conf);<a name="line.1060"></a> |
| <span class="sourceLineNo">1061</span> }<a name="line.1061"></a> |
| <span class="sourceLineNo">1062</span> this.isByTable = conf.getBoolean(HConstants.HBASE_MASTER_LOADBALANCE_BYTABLE, isByTable);<a name="line.1062"></a> |
| <span class="sourceLineNo">1063</span> // Print out base configs. Don't print overallSlop since it for simple balancer exclusively.<a name="line.1063"></a> |
| <span class="sourceLineNo">1064</span> LOG.info("slop={}, systemTablesOnMaster={}",<a name="line.1064"></a> |
| <span class="sourceLineNo">1065</span> this.slop, this.onlySystemTablesOnMaster);<a name="line.1065"></a> |
| <span class="sourceLineNo">1066</span> }<a name="line.1066"></a> |
| <span class="sourceLineNo">1067</span><a name="line.1067"></a> |
| <span class="sourceLineNo">1068</span> protected void setSlop(Configuration conf) {<a name="line.1068"></a> |
| <span class="sourceLineNo">1069</span> this.slop = conf.getFloat("hbase.regions.slop", (float) 0.2);<a name="line.1069"></a> |
| <span class="sourceLineNo">1070</span> this.overallSlop = conf.getFloat("hbase.regions.overallSlop", slop);<a name="line.1070"></a> |
| <span class="sourceLineNo">1071</span> }<a name="line.1071"></a> |
| <span class="sourceLineNo">1072</span><a name="line.1072"></a> |
| <span class="sourceLineNo">1073</span> /**<a name="line.1073"></a> |
| <span class="sourceLineNo">1074</span> * Check if a region belongs to some system table.<a name="line.1074"></a> |
| <span class="sourceLineNo">1075</span> * If so, the primary replica may be expected to be put on the master regionserver.<a name="line.1075"></a> |
| <span class="sourceLineNo">1076</span> *<a name="line.1076"></a> |
| <span class="sourceLineNo">1077</span> * @deprecated since 2.4.0, will be removed in 3.0.0.<a name="line.1077"></a> |
| <span class="sourceLineNo">1078</span> * @see <a href="https://issues.apache.org/jira/browse/HBASE-15549">HBASE-15549</a><a name="line.1078"></a> |
| <span class="sourceLineNo">1079</span> */<a name="line.1079"></a> |
| <span class="sourceLineNo">1080</span> @Deprecated<a name="line.1080"></a> |
| <span class="sourceLineNo">1081</span> public boolean shouldBeOnMaster(RegionInfo region) {<a name="line.1081"></a> |
| <span class="sourceLineNo">1082</span> return (this.maintenanceMode || this.onlySystemTablesOnMaster)<a name="line.1082"></a> |
| <span class="sourceLineNo">1083</span> && region.getTable().isSystemTable();<a name="line.1083"></a> |
| <span class="sourceLineNo">1084</span> }<a name="line.1084"></a> |
| <span class="sourceLineNo">1085</span><a name="line.1085"></a> |
| <span class="sourceLineNo">1086</span> /**<a name="line.1086"></a> |
| <span class="sourceLineNo">1087</span> * Balance the regions that should be on master regionserver.<a name="line.1087"></a> |
| <span class="sourceLineNo">1088</span> *<a name="line.1088"></a> |
| <span class="sourceLineNo">1089</span> * @deprecated since 2.4.0, will be removed in 3.0.0.<a name="line.1089"></a> |
| <span class="sourceLineNo">1090</span> * @see <a href="https://issues.apache.org/jira/browse/HBASE-15549">HBASE-15549</a><a name="line.1090"></a> |
| <span class="sourceLineNo">1091</span> */<a name="line.1091"></a> |
| <span class="sourceLineNo">1092</span> @Deprecated<a name="line.1092"></a> |
| <span class="sourceLineNo">1093</span> protected List<RegionPlan> balanceMasterRegions(Map<ServerName, List<RegionInfo>> clusterMap) {<a name="line.1093"></a> |
| <span class="sourceLineNo">1094</span> if (masterServerName == null || clusterMap == null || clusterMap.size() <= 1) return null;<a name="line.1094"></a> |
| <span class="sourceLineNo">1095</span> List<RegionPlan> plans = null;<a name="line.1095"></a> |
| <span class="sourceLineNo">1096</span> List<RegionInfo> regions = clusterMap.get(masterServerName);<a name="line.1096"></a> |
| <span class="sourceLineNo">1097</span> if (regions != null) {<a name="line.1097"></a> |
| <span class="sourceLineNo">1098</span> Iterator<ServerName> keyIt = null;<a name="line.1098"></a> |
| <span class="sourceLineNo">1099</span> for (RegionInfo region: regions) {<a name="line.1099"></a> |
| <span class="sourceLineNo">1100</span> if (shouldBeOnMaster(region)) continue;<a name="line.1100"></a> |
| <span class="sourceLineNo">1101</span><a name="line.1101"></a> |
| <span class="sourceLineNo">1102</span> // Find a non-master regionserver to host the region<a name="line.1102"></a> |
| <span class="sourceLineNo">1103</span> if (keyIt == null || !keyIt.hasNext()) {<a name="line.1103"></a> |
| <span class="sourceLineNo">1104</span> keyIt = clusterMap.keySet().iterator();<a name="line.1104"></a> |
| <span class="sourceLineNo">1105</span> }<a name="line.1105"></a> |
| <span class="sourceLineNo">1106</span> ServerName dest = keyIt.next();<a name="line.1106"></a> |
| <span class="sourceLineNo">1107</span> if (masterServerName.equals(dest)) {<a name="line.1107"></a> |
| <span class="sourceLineNo">1108</span> if (!keyIt.hasNext()) {<a name="line.1108"></a> |
| <span class="sourceLineNo">1109</span> keyIt = clusterMap.keySet().iterator();<a name="line.1109"></a> |
| <span class="sourceLineNo">1110</span> }<a name="line.1110"></a> |
| <span class="sourceLineNo">1111</span> dest = keyIt.next();<a name="line.1111"></a> |
| <span class="sourceLineNo">1112</span> }<a name="line.1112"></a> |
| <span class="sourceLineNo">1113</span><a name="line.1113"></a> |
| <span class="sourceLineNo">1114</span> // Move this region away from the master regionserver<a name="line.1114"></a> |
| <span class="sourceLineNo">1115</span> RegionPlan plan = new RegionPlan(region, masterServerName, dest);<a name="line.1115"></a> |
| <span class="sourceLineNo">1116</span> if (plans == null) {<a name="line.1116"></a> |
| <span class="sourceLineNo">1117</span> plans = new ArrayList<>();<a name="line.1117"></a> |
| <span class="sourceLineNo">1118</span> }<a name="line.1118"></a> |
| <span class="sourceLineNo">1119</span> plans.add(plan);<a name="line.1119"></a> |
| <span class="sourceLineNo">1120</span> }<a name="line.1120"></a> |
| <span class="sourceLineNo">1121</span> }<a name="line.1121"></a> |
| <span class="sourceLineNo">1122</span> for (Map.Entry<ServerName, List<RegionInfo>> server: clusterMap.entrySet()) {<a name="line.1122"></a> |
| <span class="sourceLineNo">1123</span> if (masterServerName.equals(server.getKey())) continue;<a name="line.1123"></a> |
| <span class="sourceLineNo">1124</span> for (RegionInfo region: server.getValue()) {<a name="line.1124"></a> |
| <span class="sourceLineNo">1125</span> if (!shouldBeOnMaster(region)) continue;<a name="line.1125"></a> |
| <span class="sourceLineNo">1126</span><a name="line.1126"></a> |
| <span class="sourceLineNo">1127</span> // Move this region to the master regionserver<a name="line.1127"></a> |
| <span class="sourceLineNo">1128</span> RegionPlan plan = new RegionPlan(region, server.getKey(), masterServerName);<a name="line.1128"></a> |
| <span class="sourceLineNo">1129</span> if (plans == null) {<a name="line.1129"></a> |
| <span class="sourceLineNo">1130</span> plans = new ArrayList<>();<a name="line.1130"></a> |
| <span class="sourceLineNo">1131</span> }<a name="line.1131"></a> |
| <span class="sourceLineNo">1132</span> plans.add(plan);<a name="line.1132"></a> |
| <span class="sourceLineNo">1133</span> }<a name="line.1133"></a> |
| <span class="sourceLineNo">1134</span> }<a name="line.1134"></a> |
| <span class="sourceLineNo">1135</span> return plans;<a name="line.1135"></a> |
| <span class="sourceLineNo">1136</span> }<a name="line.1136"></a> |
| <span class="sourceLineNo">1137</span><a name="line.1137"></a> |
| <span class="sourceLineNo">1138</span> /**<a name="line.1138"></a> |
| <span class="sourceLineNo">1139</span> * If master is configured to carry system tables only, in here is<a name="line.1139"></a> |
| <span class="sourceLineNo">1140</span> * where we figure what to assign it.<a name="line.1140"></a> |
| <span class="sourceLineNo">1141</span> *<a name="line.1141"></a> |
| <span class="sourceLineNo">1142</span> * @deprecated since 2.4.0, will be removed in 3.0.0.<a name="line.1142"></a> |
| <span class="sourceLineNo">1143</span> * @see <a href="https://issues.apache.org/jira/browse/HBASE-15549">HBASE-15549</a><a name="line.1143"></a> |
| <span class="sourceLineNo">1144</span> */<a name="line.1144"></a> |
| <span class="sourceLineNo">1145</span> @Deprecated<a name="line.1145"></a> |
| <span class="sourceLineNo">1146</span> @NonNull<a name="line.1146"></a> |
| <span class="sourceLineNo">1147</span> protected Map<ServerName, List<RegionInfo>> assignMasterSystemRegions(<a name="line.1147"></a> |
| <span class="sourceLineNo">1148</span> Collection<RegionInfo> regions, List<ServerName> servers) {<a name="line.1148"></a> |
| <span class="sourceLineNo">1149</span> Map<ServerName, List<RegionInfo>> assignments = new TreeMap<>();<a name="line.1149"></a> |
| <span class="sourceLineNo">1150</span> if (this.maintenanceMode || this.onlySystemTablesOnMaster) {<a name="line.1150"></a> |
| <span class="sourceLineNo">1151</span> if (masterServerName != null && servers.contains(masterServerName)) {<a name="line.1151"></a> |
| <span class="sourceLineNo">1152</span> assignments.put(masterServerName, new ArrayList<>());<a name="line.1152"></a> |
| <span class="sourceLineNo">1153</span> for (RegionInfo region : regions) {<a name="line.1153"></a> |
| <span class="sourceLineNo">1154</span> if (shouldBeOnMaster(region)) {<a name="line.1154"></a> |
| <span class="sourceLineNo">1155</span> assignments.get(masterServerName).add(region);<a name="line.1155"></a> |
| <span class="sourceLineNo">1156</span> }<a name="line.1156"></a> |
| <span class="sourceLineNo">1157</span> }<a name="line.1157"></a> |
| <span class="sourceLineNo">1158</span> }<a name="line.1158"></a> |
| <span class="sourceLineNo">1159</span> }<a name="line.1159"></a> |
| <span class="sourceLineNo">1160</span> return assignments;<a name="line.1160"></a> |
| <span class="sourceLineNo">1161</span> }<a name="line.1161"></a> |
| <span class="sourceLineNo">1162</span><a name="line.1162"></a> |
| <span class="sourceLineNo">1163</span> @Override<a name="line.1163"></a> |
| <span class="sourceLineNo">1164</span> public Configuration getConf() {<a name="line.1164"></a> |
| <span class="sourceLineNo">1165</span> return this.config;<a name="line.1165"></a> |
| <span class="sourceLineNo">1166</span> }<a name="line.1166"></a> |
| <span class="sourceLineNo">1167</span><a name="line.1167"></a> |
| <span class="sourceLineNo">1168</span> @Override<a name="line.1168"></a> |
| <span class="sourceLineNo">1169</span> public synchronized void setClusterMetrics(ClusterMetrics st) {<a name="line.1169"></a> |
| <span class="sourceLineNo">1170</span> this.clusterStatus = st;<a name="line.1170"></a> |
| <span class="sourceLineNo">1171</span> if (useRegionFinder) {<a name="line.1171"></a> |
| <span class="sourceLineNo">1172</span> regionFinder.setClusterMetrics(st);<a name="line.1172"></a> |
| <span class="sourceLineNo">1173</span> }<a name="line.1173"></a> |
| <span class="sourceLineNo">1174</span> }<a name="line.1174"></a> |
| <span class="sourceLineNo">1175</span><a name="line.1175"></a> |
| <span class="sourceLineNo">1176</span><a name="line.1176"></a> |
| <span class="sourceLineNo">1177</span> @Override<a name="line.1177"></a> |
| <span class="sourceLineNo">1178</span> public void setMasterServices(MasterServices masterServices) {<a name="line.1178"></a> |
| <span class="sourceLineNo">1179</span> masterServerName = masterServices.getServerName();<a name="line.1179"></a> |
| <span class="sourceLineNo">1180</span> this.services = masterServices;<a name="line.1180"></a> |
| <span class="sourceLineNo">1181</span> if (useRegionFinder) {<a name="line.1181"></a> |
| <span class="sourceLineNo">1182</span> this.regionFinder.setClusterInfoProvider(new MasterClusterInfoProvider(services));<a name="line.1182"></a> |
| <span class="sourceLineNo">1183</span> }<a name="line.1183"></a> |
| <span class="sourceLineNo">1184</span> if (this.services.isInMaintenanceMode()) {<a name="line.1184"></a> |
| <span class="sourceLineNo">1185</span> this.maintenanceMode = true;<a name="line.1185"></a> |
| <span class="sourceLineNo">1186</span> }<a name="line.1186"></a> |
| <span class="sourceLineNo">1187</span> }<a name="line.1187"></a> |
| <span class="sourceLineNo">1188</span><a name="line.1188"></a> |
| <span class="sourceLineNo">1189</span> @Override<a name="line.1189"></a> |
| <span class="sourceLineNo">1190</span> public void postMasterStartupInitialize() {<a name="line.1190"></a> |
| <span class="sourceLineNo">1191</span> if (services != null && regionFinder != null) {<a name="line.1191"></a> |
| <span class="sourceLineNo">1192</span> try {<a name="line.1192"></a> |
| <span class="sourceLineNo">1193</span> Set<RegionInfo> regions =<a name="line.1193"></a> |
| <span class="sourceLineNo">1194</span> services.getAssignmentManager().getRegionStates().getRegionAssignments().keySet();<a name="line.1194"></a> |
| <span class="sourceLineNo">1195</span> regionFinder.refreshAndWait(regions);<a name="line.1195"></a> |
| <span class="sourceLineNo">1196</span> } catch (Exception e) {<a name="line.1196"></a> |
| <span class="sourceLineNo">1197</span> LOG.warn("Refreshing region HDFS Block dist failed with exception, ignoring", e);<a name="line.1197"></a> |
| <span class="sourceLineNo">1198</span> }<a name="line.1198"></a> |
| <span class="sourceLineNo">1199</span> }<a name="line.1199"></a> |
| <span class="sourceLineNo">1200</span> }<a name="line.1200"></a> |
| <span class="sourceLineNo">1201</span><a name="line.1201"></a> |
| <span class="sourceLineNo">1202</span> public void setRackManager(RackManager rackManager) {<a name="line.1202"></a> |
| <span class="sourceLineNo">1203</span> this.rackManager = rackManager;<a name="line.1203"></a> |
| <span class="sourceLineNo">1204</span> }<a name="line.1204"></a> |
| <span class="sourceLineNo">1205</span><a name="line.1205"></a> |
| <span class="sourceLineNo">1206</span> protected boolean needsBalance(TableName tableName, Cluster c) {<a name="line.1206"></a> |
| <span class="sourceLineNo">1207</span> ClusterLoadState cs = new ClusterLoadState(c.clusterState);<a name="line.1207"></a> |
| <span class="sourceLineNo">1208</span> if (cs.getNumServers() < MIN_SERVER_BALANCE) {<a name="line.1208"></a> |
| <span class="sourceLineNo">1209</span> if (LOG.isDebugEnabled()) {<a name="line.1209"></a> |
| <span class="sourceLineNo">1210</span> LOG.debug("Not running balancer because only " + cs.getNumServers()<a name="line.1210"></a> |
| <span class="sourceLineNo">1211</span> + " active regionserver(s)");<a name="line.1211"></a> |
| <span class="sourceLineNo">1212</span> }<a name="line.1212"></a> |
| <span class="sourceLineNo">1213</span> return false;<a name="line.1213"></a> |
| <span class="sourceLineNo">1214</span> }<a name="line.1214"></a> |
| <span class="sourceLineNo">1215</span> if(areSomeRegionReplicasColocated(c)) return true;<a name="line.1215"></a> |
| <span class="sourceLineNo">1216</span> if(idleRegionServerExist(c)) {<a name="line.1216"></a> |
| <span class="sourceLineNo">1217</span> return true;<a name="line.1217"></a> |
| <span class="sourceLineNo">1218</span> }<a name="line.1218"></a> |
| <span class="sourceLineNo">1219</span><a name="line.1219"></a> |
| <span class="sourceLineNo">1220</span> // Check if we even need to do any load balancing<a name="line.1220"></a> |
| <span class="sourceLineNo">1221</span> // HBASE-3681 check sloppiness first<a name="line.1221"></a> |
| <span class="sourceLineNo">1222</span> float average = cs.getLoadAverage(); // for logging<a name="line.1222"></a> |
| <span class="sourceLineNo">1223</span> int floor = (int) Math.floor(average * (1 - slop));<a name="line.1223"></a> |
| <span class="sourceLineNo">1224</span> int ceiling = (int) Math.ceil(average * (1 + slop));<a name="line.1224"></a> |
| <span class="sourceLineNo">1225</span> if (!(cs.getMaxLoad() > ceiling || cs.getMinLoad() < floor)) {<a name="line.1225"></a> |
| <span class="sourceLineNo">1226</span> NavigableMap<ServerAndLoad, List<RegionInfo>> serversByLoad = cs.getServersByLoad();<a name="line.1226"></a> |
| <span class="sourceLineNo">1227</span> if (LOG.isTraceEnabled()) {<a name="line.1227"></a> |
| <span class="sourceLineNo">1228</span> // If nothing to balance, then don't say anything unless trace-level logging.<a name="line.1228"></a> |
| <span class="sourceLineNo">1229</span> LOG.trace("Skipping load balancing because balanced cluster; " +<a name="line.1229"></a> |
| <span class="sourceLineNo">1230</span> "servers=" + cs.getNumServers() +<a name="line.1230"></a> |
| <span class="sourceLineNo">1231</span> " regions=" + cs.getNumRegions() + " average=" + average +<a name="line.1231"></a> |
| <span class="sourceLineNo">1232</span> " mostloaded=" + serversByLoad.lastKey().getLoad() +<a name="line.1232"></a> |
| <span class="sourceLineNo">1233</span> " leastloaded=" + serversByLoad.firstKey().getLoad());<a name="line.1233"></a> |
| <span class="sourceLineNo">1234</span> }<a name="line.1234"></a> |
| <span class="sourceLineNo">1235</span> return false;<a name="line.1235"></a> |
| <span class="sourceLineNo">1236</span> }<a name="line.1236"></a> |
| <span class="sourceLineNo">1237</span> return true;<a name="line.1237"></a> |
| <span class="sourceLineNo">1238</span> }<a name="line.1238"></a> |
| <span class="sourceLineNo">1239</span><a name="line.1239"></a> |
| <span class="sourceLineNo">1240</span> /**<a name="line.1240"></a> |
| <span class="sourceLineNo">1241</span> * Subclasses should implement this to return true if the cluster has nodes that hosts<a name="line.1241"></a> |
| <span class="sourceLineNo">1242</span> * multiple replicas for the same region, or, if there are multiple racks and the same<a name="line.1242"></a> |
| <span class="sourceLineNo">1243</span> * rack hosts replicas of the same region<a name="line.1243"></a> |
| <span class="sourceLineNo">1244</span> * @param c Cluster information<a name="line.1244"></a> |
| <span class="sourceLineNo">1245</span> * @return whether region replicas are currently co-located<a name="line.1245"></a> |
| <span class="sourceLineNo">1246</span> */<a name="line.1246"></a> |
| <span class="sourceLineNo">1247</span> protected boolean areSomeRegionReplicasColocated(Cluster c) {<a name="line.1247"></a> |
| <span class="sourceLineNo">1248</span> return false;<a name="line.1248"></a> |
| <span class="sourceLineNo">1249</span> }<a name="line.1249"></a> |
| <span class="sourceLineNo">1250</span><a name="line.1250"></a> |
| <span class="sourceLineNo">1251</span> protected final boolean idleRegionServerExist(Cluster c){<a name="line.1251"></a> |
| <span class="sourceLineNo">1252</span> boolean isServerExistsWithMoreRegions = false;<a name="line.1252"></a> |
| <span class="sourceLineNo">1253</span> boolean isServerExistsWithZeroRegions = false;<a name="line.1253"></a> |
| <span class="sourceLineNo">1254</span> for (int[] serverList: c.regionsPerServer){<a name="line.1254"></a> |
| <span class="sourceLineNo">1255</span> if (serverList.length > 1) {<a name="line.1255"></a> |
| <span class="sourceLineNo">1256</span> isServerExistsWithMoreRegions = true;<a name="line.1256"></a> |
| <span class="sourceLineNo">1257</span> }<a name="line.1257"></a> |
| <span class="sourceLineNo">1258</span> if (serverList.length == 0) {<a name="line.1258"></a> |
| <span class="sourceLineNo">1259</span> isServerExistsWithZeroRegions = true;<a name="line.1259"></a> |
| <span class="sourceLineNo">1260</span> }<a name="line.1260"></a> |
| <span class="sourceLineNo">1261</span> }<a name="line.1261"></a> |
| <span class="sourceLineNo">1262</span> return isServerExistsWithMoreRegions && isServerExistsWithZeroRegions;<a name="line.1262"></a> |
| <span class="sourceLineNo">1263</span> }<a name="line.1263"></a> |
| <span class="sourceLineNo">1264</span><a name="line.1264"></a> |
| <span class="sourceLineNo">1265</span> /**<a name="line.1265"></a> |
| <span class="sourceLineNo">1266</span> * Generates a bulk assignment plan to be used on cluster startup using a<a name="line.1266"></a> |
| <span class="sourceLineNo">1267</span> * simple round-robin assignment.<a name="line.1267"></a> |
| <span class="sourceLineNo">1268</span> * <p><a name="line.1268"></a> |
| <span class="sourceLineNo">1269</span> * Takes a list of all the regions and all the servers in the cluster and<a name="line.1269"></a> |
| <span class="sourceLineNo">1270</span> * returns a map of each server to the regions that it should be assigned.<a name="line.1270"></a> |
| <span class="sourceLineNo">1271</span> * <p><a name="line.1271"></a> |
| <span class="sourceLineNo">1272</span> * Currently implemented as a round-robin assignment. Same invariant as load<a name="line.1272"></a> |
| <span class="sourceLineNo">1273</span> * balancing, all servers holding floor(avg) or ceiling(avg).<a name="line.1273"></a> |
| <span class="sourceLineNo">1274</span> *<a name="line.1274"></a> |
| <span class="sourceLineNo">1275</span> * TODO: Use block locations from HDFS to place regions with their blocks<a name="line.1275"></a> |
| <span class="sourceLineNo">1276</span> *<a name="line.1276"></a> |
| <span class="sourceLineNo">1277</span> * @param regions all regions<a name="line.1277"></a> |
| <span class="sourceLineNo">1278</span> * @param servers all servers<a name="line.1278"></a> |
| <span class="sourceLineNo">1279</span> * @return map of server to the regions it should take, or emptyMap if no<a name="line.1279"></a> |
| <span class="sourceLineNo">1280</span> * assignment is possible (ie. no servers)<a name="line.1280"></a> |
| <span class="sourceLineNo">1281</span> */<a name="line.1281"></a> |
| <span class="sourceLineNo">1282</span> @Override<a name="line.1282"></a> |
| <span class="sourceLineNo">1283</span> @NonNull<a name="line.1283"></a> |
| <span class="sourceLineNo">1284</span> public Map<ServerName, List<RegionInfo>> roundRobinAssignment(List<RegionInfo> regions,<a name="line.1284"></a> |
| <span class="sourceLineNo">1285</span> List<ServerName> servers) throws HBaseIOException {<a name="line.1285"></a> |
| <span class="sourceLineNo">1286</span> metricsBalancer.incrMiscInvocations();<a name="line.1286"></a> |
| <span class="sourceLineNo">1287</span> Map<ServerName, List<RegionInfo>> assignments = assignMasterSystemRegions(regions, servers);<a name="line.1287"></a> |
| <span class="sourceLineNo">1288</span> if (!assignments.isEmpty()) {<a name="line.1288"></a> |
| <span class="sourceLineNo">1289</span> servers = new ArrayList<>(servers);<a name="line.1289"></a> |
| <span class="sourceLineNo">1290</span> // Guarantee not to put other regions on master<a name="line.1290"></a> |
| <span class="sourceLineNo">1291</span> servers.remove(masterServerName);<a name="line.1291"></a> |
| <span class="sourceLineNo">1292</span> List<RegionInfo> masterRegions = assignments.get(masterServerName);<a name="line.1292"></a> |
| <span class="sourceLineNo">1293</span> if (!masterRegions.isEmpty()) {<a name="line.1293"></a> |
| <span class="sourceLineNo">1294</span> regions = new ArrayList<>(regions);<a name="line.1294"></a> |
| <span class="sourceLineNo">1295</span> regions.removeAll(masterRegions);<a name="line.1295"></a> |
| <span class="sourceLineNo">1296</span> }<a name="line.1296"></a> |
| <span class="sourceLineNo">1297</span> }<a name="line.1297"></a> |
| <span class="sourceLineNo">1298</span> /**<a name="line.1298"></a> |
| <span class="sourceLineNo">1299</span> * only need assign system table<a name="line.1299"></a> |
| <span class="sourceLineNo">1300</span> */<a name="line.1300"></a> |
| <span class="sourceLineNo">1301</span> if (this.maintenanceMode || regions.isEmpty()) {<a name="line.1301"></a> |
| <span class="sourceLineNo">1302</span> return assignments;<a name="line.1302"></a> |
| <span class="sourceLineNo">1303</span> }<a name="line.1303"></a> |
| <span class="sourceLineNo">1304</span><a name="line.1304"></a> |
| <span class="sourceLineNo">1305</span> int numServers = servers == null ? 0 : servers.size();<a name="line.1305"></a> |
| <span class="sourceLineNo">1306</span> if (numServers == 0) {<a name="line.1306"></a> |
| <span class="sourceLineNo">1307</span> LOG.warn("Wanted to do round robin assignment but no servers to assign to");<a name="line.1307"></a> |
| <span class="sourceLineNo">1308</span> return Collections.emptyMap();<a name="line.1308"></a> |
| <span class="sourceLineNo">1309</span> }<a name="line.1309"></a> |
| <span class="sourceLineNo">1310</span><a name="line.1310"></a> |
| <span class="sourceLineNo">1311</span> // TODO: instead of retainAssignment() and roundRobinAssignment(), we should just run the<a name="line.1311"></a> |
| <span class="sourceLineNo">1312</span> // normal LB.balancerCluster() with unassignedRegions. We only need to have a candidate<a name="line.1312"></a> |
| <span class="sourceLineNo">1313</span> // generator for AssignRegionAction. The LB will ensure the regions are mostly local<a name="line.1313"></a> |
| <span class="sourceLineNo">1314</span> // and balanced. This should also run fast with fewer number of iterations.<a name="line.1314"></a> |
| <span class="sourceLineNo">1315</span><a name="line.1315"></a> |
| <span class="sourceLineNo">1316</span> if (numServers == 1) { // Only one server, nothing fancy we can do here<a name="line.1316"></a> |
| <span class="sourceLineNo">1317</span> ServerName server = servers.get(0);<a name="line.1317"></a> |
| <span class="sourceLineNo">1318</span> assignments.put(server, new ArrayList<>(regions));<a name="line.1318"></a> |
| <span class="sourceLineNo">1319</span> return assignments;<a name="line.1319"></a> |
| <span class="sourceLineNo">1320</span> }<a name="line.1320"></a> |
| <span class="sourceLineNo">1321</span><a name="line.1321"></a> |
| <span class="sourceLineNo">1322</span> Cluster cluster = createCluster(servers, regions);<a name="line.1322"></a> |
| <span class="sourceLineNo">1323</span> roundRobinAssignment(cluster, regions, servers, assignments);<a name="line.1323"></a> |
| <span class="sourceLineNo">1324</span> return assignments;<a name="line.1324"></a> |
| <span class="sourceLineNo">1325</span> }<a name="line.1325"></a> |
| <span class="sourceLineNo">1326</span><a name="line.1326"></a> |
| <span class="sourceLineNo">1327</span> protected Cluster createCluster(List<ServerName> servers, Collection<RegionInfo> regions)<a name="line.1327"></a> |
| <span class="sourceLineNo">1328</span> throws HBaseIOException {<a name="line.1328"></a> |
| <span class="sourceLineNo">1329</span> boolean hasRegionReplica = false;<a name="line.1329"></a> |
| <span class="sourceLineNo">1330</span> try {<a name="line.1330"></a> |
| <span class="sourceLineNo">1331</span> if (services != null && services.getTableDescriptors() != null) {<a name="line.1331"></a> |
| <span class="sourceLineNo">1332</span> Map<String, TableDescriptor> tds = services.getTableDescriptors().getAll();<a name="line.1332"></a> |
| <span class="sourceLineNo">1333</span> for (RegionInfo regionInfo : regions) {<a name="line.1333"></a> |
| <span class="sourceLineNo">1334</span> TableDescriptor td = tds.get(regionInfo.getTable().getNameWithNamespaceInclAsString());<a name="line.1334"></a> |
| <span class="sourceLineNo">1335</span> if (td != null && td.getRegionReplication() > 1) {<a name="line.1335"></a> |
| <span class="sourceLineNo">1336</span> hasRegionReplica = true;<a name="line.1336"></a> |
| <span class="sourceLineNo">1337</span> break;<a name="line.1337"></a> |
| <span class="sourceLineNo">1338</span> }<a name="line.1338"></a> |
| <span class="sourceLineNo">1339</span> }<a name="line.1339"></a> |
| <span class="sourceLineNo">1340</span> }<a name="line.1340"></a> |
| <span class="sourceLineNo">1341</span> } catch (IOException ioe) {<a name="line.1341"></a> |
| <span class="sourceLineNo">1342</span> throw new HBaseIOException(ioe);<a name="line.1342"></a> |
| <span class="sourceLineNo">1343</span> }<a name="line.1343"></a> |
| <span class="sourceLineNo">1344</span><a name="line.1344"></a> |
| <span class="sourceLineNo">1345</span> // Get the snapshot of the current assignments for the regions in question, and then create<a name="line.1345"></a> |
| <span class="sourceLineNo">1346</span> // a cluster out of it. Note that we might have replicas already assigned to some servers<a name="line.1346"></a> |
| <span class="sourceLineNo">1347</span> // earlier. So we want to get the snapshot to see those assignments, but this will only contain<a name="line.1347"></a> |
| <span class="sourceLineNo">1348</span> // replicas of the regions that are passed (for performance).<a name="line.1348"></a> |
| <span class="sourceLineNo">1349</span> Map<ServerName, List<RegionInfo>> clusterState = null;<a name="line.1349"></a> |
| <span class="sourceLineNo">1350</span> if (!hasRegionReplica) {<a name="line.1350"></a> |
| <span class="sourceLineNo">1351</span> clusterState = getRegionAssignmentsByServer(regions);<a name="line.1351"></a> |
| <span class="sourceLineNo">1352</span> } else {<a name="line.1352"></a> |
| <span class="sourceLineNo">1353</span> // for the case where we have region replica it is better we get the entire cluster's snapshot<a name="line.1353"></a> |
| <span class="sourceLineNo">1354</span> clusterState = getRegionAssignmentsByServer(null);<a name="line.1354"></a> |
| <span class="sourceLineNo">1355</span> }<a name="line.1355"></a> |
| <span class="sourceLineNo">1356</span><a name="line.1356"></a> |
| <span class="sourceLineNo">1357</span> for (ServerName server : servers) {<a name="line.1357"></a> |
| <span class="sourceLineNo">1358</span> if (!clusterState.containsKey(server)) {<a name="line.1358"></a> |
| <span class="sourceLineNo">1359</span> clusterState.put(server, EMPTY_REGION_LIST);<a name="line.1359"></a> |
| <span class="sourceLineNo">1360</span> }<a name="line.1360"></a> |
| <span class="sourceLineNo">1361</span> }<a name="line.1361"></a> |
| <span class="sourceLineNo">1362</span> return new Cluster(regions, clusterState, null, this.regionFinder,<a name="line.1362"></a> |
| <span class="sourceLineNo">1363</span> rackManager);<a name="line.1363"></a> |
| <span class="sourceLineNo">1364</span> }<a name="line.1364"></a> |
| <span class="sourceLineNo">1365</span><a name="line.1365"></a> |
| <span class="sourceLineNo">1366</span> private List<ServerName> findIdleServers(List<ServerName> servers) {<a name="line.1366"></a> |
| <span class="sourceLineNo">1367</span> return this.services.getServerManager()<a name="line.1367"></a> |
| <span class="sourceLineNo">1368</span> .getOnlineServersListWithPredicator(servers, IDLE_SERVER_PREDICATOR);<a name="line.1368"></a> |
| <span class="sourceLineNo">1369</span> }<a name="line.1369"></a> |
| <span class="sourceLineNo">1370</span><a name="line.1370"></a> |
| <span class="sourceLineNo">1371</span> /**<a name="line.1371"></a> |
| <span class="sourceLineNo">1372</span> * Used to assign a single region to a random server.<a name="line.1372"></a> |
| <span class="sourceLineNo">1373</span> */<a name="line.1373"></a> |
| <span class="sourceLineNo">1374</span> @Override<a name="line.1374"></a> |
| <span class="sourceLineNo">1375</span> public ServerName randomAssignment(RegionInfo regionInfo, List<ServerName> servers)<a name="line.1375"></a> |
| <span class="sourceLineNo">1376</span> throws HBaseIOException {<a name="line.1376"></a> |
| <span class="sourceLineNo">1377</span> metricsBalancer.incrMiscInvocations();<a name="line.1377"></a> |
| <span class="sourceLineNo">1378</span> if (servers != null && servers.contains(masterServerName)) {<a name="line.1378"></a> |
| <span class="sourceLineNo">1379</span> if (shouldBeOnMaster(regionInfo)) {<a name="line.1379"></a> |
| <span class="sourceLineNo">1380</span> return masterServerName;<a name="line.1380"></a> |
| <span class="sourceLineNo">1381</span> }<a name="line.1381"></a> |
| <span class="sourceLineNo">1382</span> if (!LoadBalancer.isTablesOnMaster(getConf())) {<a name="line.1382"></a> |
| <span class="sourceLineNo">1383</span> // Guarantee we do not put any regions on master<a name="line.1383"></a> |
| <span class="sourceLineNo">1384</span> servers = new ArrayList<>(servers);<a name="line.1384"></a> |
| <span class="sourceLineNo">1385</span> servers.remove(masterServerName);<a name="line.1385"></a> |
| <span class="sourceLineNo">1386</span> }<a name="line.1386"></a> |
| <span class="sourceLineNo">1387</span> }<a name="line.1387"></a> |
| <span class="sourceLineNo">1388</span><a name="line.1388"></a> |
| <span class="sourceLineNo">1389</span> int numServers = servers == null ? 0 : servers.size();<a name="line.1389"></a> |
| <span class="sourceLineNo">1390</span> if (numServers == 0) {<a name="line.1390"></a> |
| <span class="sourceLineNo">1391</span> LOG.warn("Wanted to retain assignment but no servers to assign to");<a name="line.1391"></a> |
| <span class="sourceLineNo">1392</span> return null;<a name="line.1392"></a> |
| <span class="sourceLineNo">1393</span> }<a name="line.1393"></a> |
| <span class="sourceLineNo">1394</span> if (numServers == 1) { // Only one server, nothing fancy we can do here<a name="line.1394"></a> |
| <span class="sourceLineNo">1395</span> return servers.get(0);<a name="line.1395"></a> |
| <span class="sourceLineNo">1396</span> }<a name="line.1396"></a> |
| <span class="sourceLineNo">1397</span> List<ServerName> idleServers = findIdleServers(servers);<a name="line.1397"></a> |
| <span class="sourceLineNo">1398</span> if (idleServers.size() == 1) {<a name="line.1398"></a> |
| <span class="sourceLineNo">1399</span> return idleServers.get(0);<a name="line.1399"></a> |
| <span class="sourceLineNo">1400</span> }<a name="line.1400"></a> |
| <span class="sourceLineNo">1401</span> final List<ServerName> finalServers = idleServers.isEmpty() ?<a name="line.1401"></a> |
| <span class="sourceLineNo">1402</span> servers : idleServers;<a name="line.1402"></a> |
| <span class="sourceLineNo">1403</span> List<RegionInfo> regions = Lists.newArrayList(regionInfo);<a name="line.1403"></a> |
| <span class="sourceLineNo">1404</span> Cluster cluster = createCluster(finalServers, regions);<a name="line.1404"></a> |
| <span class="sourceLineNo">1405</span> return randomAssignment(cluster, regionInfo, finalServers);<a name="line.1405"></a> |
| <span class="sourceLineNo">1406</span> }<a name="line.1406"></a> |
| <span class="sourceLineNo">1407</span><a name="line.1407"></a> |
| <span class="sourceLineNo">1408</span> /**<a name="line.1408"></a> |
| <span class="sourceLineNo">1409</span> * Generates a bulk assignment startup plan, attempting to reuse the existing<a name="line.1409"></a> |
| <span class="sourceLineNo">1410</span> * assignment information from META, but adjusting for the specified list of<a name="line.1410"></a> |
| <span class="sourceLineNo">1411</span> * available/online servers available for assignment.<a name="line.1411"></a> |
| <span class="sourceLineNo">1412</span> * <p><a name="line.1412"></a> |
| <span class="sourceLineNo">1413</span> * Takes a map of all regions to their existing assignment from META. Also<a name="line.1413"></a> |
| <span class="sourceLineNo">1414</span> * takes a list of online servers for regions to be assigned to. Attempts to<a name="line.1414"></a> |
| <span class="sourceLineNo">1415</span> * retain all assignment, so in some instances initial assignment will not be<a name="line.1415"></a> |
| <span class="sourceLineNo">1416</span> * completely balanced.<a name="line.1416"></a> |
| <span class="sourceLineNo">1417</span> * <p><a name="line.1417"></a> |
| <span class="sourceLineNo">1418</span> * Any leftover regions without an existing server to be assigned to will be<a name="line.1418"></a> |
| <span class="sourceLineNo">1419</span> * assigned randomly to available servers.<a name="line.1419"></a> |
| <span class="sourceLineNo">1420</span> *<a name="line.1420"></a> |
| <span class="sourceLineNo">1421</span> * @param regions regions and existing assignment from meta<a name="line.1421"></a> |
| <span class="sourceLineNo">1422</span> * @param servers available servers<a name="line.1422"></a> |
| <span class="sourceLineNo">1423</span> * @return map of servers and regions to be assigned to them, or emptyMap if no<a name="line.1423"></a> |
| <span class="sourceLineNo">1424</span> * assignment is possible (ie. no servers)<a name="line.1424"></a> |
| <span class="sourceLineNo">1425</span> */<a name="line.1425"></a> |
| <span class="sourceLineNo">1426</span> @Override<a name="line.1426"></a> |
| <span class="sourceLineNo">1427</span> @NonNull<a name="line.1427"></a> |
| <span class="sourceLineNo">1428</span> public Map<ServerName, List<RegionInfo>> retainAssignment(Map<RegionInfo, ServerName> regions,<a name="line.1428"></a> |
| <span class="sourceLineNo">1429</span> List<ServerName> servers) throws HBaseIOException {<a name="line.1429"></a> |
| <span class="sourceLineNo">1430</span> // Update metrics<a name="line.1430"></a> |
| <span class="sourceLineNo">1431</span> metricsBalancer.incrMiscInvocations();<a name="line.1431"></a> |
| <span class="sourceLineNo">1432</span> Map<ServerName, List<RegionInfo>> assignments = assignMasterSystemRegions(regions.keySet(), servers);<a name="line.1432"></a> |
| <span class="sourceLineNo">1433</span> if (!assignments.isEmpty()) {<a name="line.1433"></a> |
| <span class="sourceLineNo">1434</span> servers = new ArrayList<>(servers);<a name="line.1434"></a> |
| <span class="sourceLineNo">1435</span> // Guarantee not to put other regions on master<a name="line.1435"></a> |
| <span class="sourceLineNo">1436</span> servers.remove(masterServerName);<a name="line.1436"></a> |
| <span class="sourceLineNo">1437</span> List<RegionInfo> masterRegions = assignments.get(masterServerName);<a name="line.1437"></a> |
| <span class="sourceLineNo">1438</span> regions = regions.entrySet().stream().filter(e -> !masterRegions.contains(e.getKey()))<a name="line.1438"></a> |
| <span class="sourceLineNo">1439</span> .collect(Collectors.toMap(Map.Entry::getKey, Map.Entry::getValue));<a name="line.1439"></a> |
| <span class="sourceLineNo">1440</span> }<a name="line.1440"></a> |
| <span class="sourceLineNo">1441</span> if (this.maintenanceMode || regions.isEmpty()) {<a name="line.1441"></a> |
| <span class="sourceLineNo">1442</span> return assignments;<a name="line.1442"></a> |
| <span class="sourceLineNo">1443</span> }<a name="line.1443"></a> |
| <span class="sourceLineNo">1444</span><a name="line.1444"></a> |
| <span class="sourceLineNo">1445</span> int numServers = servers == null ? 0 : servers.size();<a name="line.1445"></a> |
| <span class="sourceLineNo">1446</span> if (numServers == 0) {<a name="line.1446"></a> |
| <span class="sourceLineNo">1447</span> LOG.warn("Wanted to do retain assignment but no servers to assign to");<a name="line.1447"></a> |
| <span class="sourceLineNo">1448</span> return Collections.emptyMap();<a name="line.1448"></a> |
| <span class="sourceLineNo">1449</span> }<a name="line.1449"></a> |
| <span class="sourceLineNo">1450</span> if (numServers == 1) { // Only one server, nothing fancy we can do here<a name="line.1450"></a> |
| <span class="sourceLineNo">1451</span> ServerName server = servers.get(0);<a name="line.1451"></a> |
| <span class="sourceLineNo">1452</span> assignments.put(server, new ArrayList<>(regions.keySet()));<a name="line.1452"></a> |
| <span class="sourceLineNo">1453</span> return assignments;<a name="line.1453"></a> |
| <span class="sourceLineNo">1454</span> }<a name="line.1454"></a> |
| <span class="sourceLineNo">1455</span><a name="line.1455"></a> |
| <span class="sourceLineNo">1456</span> // Group all of the old assignments by their hostname.<a name="line.1456"></a> |
| <span class="sourceLineNo">1457</span> // We can't group directly by ServerName since the servers all have<a name="line.1457"></a> |
| <span class="sourceLineNo">1458</span> // new start-codes.<a name="line.1458"></a> |
| <span class="sourceLineNo">1459</span><a name="line.1459"></a> |
| <span class="sourceLineNo">1460</span> // Group the servers by their hostname. It's possible we have multiple<a name="line.1460"></a> |
| <span class="sourceLineNo">1461</span> // servers on the same host on different ports.<a name="line.1461"></a> |
| <span class="sourceLineNo">1462</span> ArrayListMultimap<String, ServerName> serversByHostname = ArrayListMultimap.create();<a name="line.1462"></a> |
| <span class="sourceLineNo">1463</span> for (ServerName server : servers) {<a name="line.1463"></a> |
| <span class="sourceLineNo">1464</span> assignments.put(server, new ArrayList<>());<a name="line.1464"></a> |
| <span class="sourceLineNo">1465</span> serversByHostname.put(server.getHostnameLowerCase(), server);<a name="line.1465"></a> |
| <span class="sourceLineNo">1466</span> }<a name="line.1466"></a> |
| <span class="sourceLineNo">1467</span><a name="line.1467"></a> |
| <span class="sourceLineNo">1468</span> // Collection of the hostnames that used to have regions<a name="line.1468"></a> |
| <span class="sourceLineNo">1469</span> // assigned, but for which we no longer have any RS running<a name="line.1469"></a> |
| <span class="sourceLineNo">1470</span> // after the cluster restart.<a name="line.1470"></a> |
| <span class="sourceLineNo">1471</span> Set<String> oldHostsNoLongerPresent = Sets.newTreeSet();<a name="line.1471"></a> |
| <span class="sourceLineNo">1472</span><a name="line.1472"></a> |
| <span class="sourceLineNo">1473</span> // If the old servers aren't present, lets assign those regions later.<a name="line.1473"></a> |
| <span class="sourceLineNo">1474</span> List<RegionInfo> randomAssignRegions = Lists.newArrayList();<a name="line.1474"></a> |
| <span class="sourceLineNo">1475</span><a name="line.1475"></a> |
| <span class="sourceLineNo">1476</span> int numRandomAssignments = 0;<a name="line.1476"></a> |
| <span class="sourceLineNo">1477</span> int numRetainedAssigments = 0;<a name="line.1477"></a> |
| <span class="sourceLineNo">1478</span> for (Map.Entry<RegionInfo, ServerName> entry : regions.entrySet()) {<a name="line.1478"></a> |
| <span class="sourceLineNo">1479</span> RegionInfo region = entry.getKey();<a name="line.1479"></a> |
| <span class="sourceLineNo">1480</span> ServerName oldServerName = entry.getValue();<a name="line.1480"></a> |
| <span class="sourceLineNo">1481</span> List<ServerName> localServers = new ArrayList<>();<a name="line.1481"></a> |
| <span class="sourceLineNo">1482</span> if (oldServerName != null) {<a name="line.1482"></a> |
| <span class="sourceLineNo">1483</span> localServers = serversByHostname.get(oldServerName.getHostnameLowerCase());<a name="line.1483"></a> |
| <span class="sourceLineNo">1484</span> }<a name="line.1484"></a> |
| <span class="sourceLineNo">1485</span> if (localServers.isEmpty()) {<a name="line.1485"></a> |
| <span class="sourceLineNo">1486</span> // No servers on the new cluster match up with this hostname, assign randomly, later.<a name="line.1486"></a> |
| <span class="sourceLineNo">1487</span> randomAssignRegions.add(region);<a name="line.1487"></a> |
| <span class="sourceLineNo">1488</span> if (oldServerName != null) {<a name="line.1488"></a> |
| <span class="sourceLineNo">1489</span> oldHostsNoLongerPresent.add(oldServerName.getHostnameLowerCase());<a name="line.1489"></a> |
| <span class="sourceLineNo">1490</span> }<a name="line.1490"></a> |
| <span class="sourceLineNo">1491</span> } else if (localServers.size() == 1) {<a name="line.1491"></a> |
| <span class="sourceLineNo">1492</span> // the usual case - one new server on same host<a name="line.1492"></a> |
| <span class="sourceLineNo">1493</span> ServerName target = localServers.get(0);<a name="line.1493"></a> |
| <span class="sourceLineNo">1494</span> assignments.get(target).add(region);<a name="line.1494"></a> |
| <span class="sourceLineNo">1495</span> numRetainedAssigments++;<a name="line.1495"></a> |
| <span class="sourceLineNo">1496</span> } else {<a name="line.1496"></a> |
| <span class="sourceLineNo">1497</span> // multiple new servers in the cluster on this same host<a name="line.1497"></a> |
| <span class="sourceLineNo">1498</span> if (localServers.contains(oldServerName)) {<a name="line.1498"></a> |
| <span class="sourceLineNo">1499</span> assignments.get(oldServerName).add(region);<a name="line.1499"></a> |
| <span class="sourceLineNo">1500</span> numRetainedAssigments++;<a name="line.1500"></a> |
| <span class="sourceLineNo">1501</span> } else {<a name="line.1501"></a> |
| <span class="sourceLineNo">1502</span> ServerName target = null;<a name="line.1502"></a> |
| <span class="sourceLineNo">1503</span> for (ServerName tmp : localServers) {<a name="line.1503"></a> |
| <span class="sourceLineNo">1504</span> if (tmp.getPort() == oldServerName.getPort()) {<a name="line.1504"></a> |
| <span class="sourceLineNo">1505</span> target = tmp;<a name="line.1505"></a> |
| <span class="sourceLineNo">1506</span> assignments.get(tmp).add(region);<a name="line.1506"></a> |
| <span class="sourceLineNo">1507</span> numRetainedAssigments++;<a name="line.1507"></a> |
| <span class="sourceLineNo">1508</span> break;<a name="line.1508"></a> |
| <span class="sourceLineNo">1509</span> }<a name="line.1509"></a> |
| <span class="sourceLineNo">1510</span> }<a name="line.1510"></a> |
| <span class="sourceLineNo">1511</span> if (target == null) {<a name="line.1511"></a> |
| <span class="sourceLineNo">1512</span> randomAssignRegions.add(region);<a name="line.1512"></a> |
| <span class="sourceLineNo">1513</span> }<a name="line.1513"></a> |
| <span class="sourceLineNo">1514</span> }<a name="line.1514"></a> |
| <span class="sourceLineNo">1515</span> }<a name="line.1515"></a> |
| <span class="sourceLineNo">1516</span> }<a name="line.1516"></a> |
| <span class="sourceLineNo">1517</span><a name="line.1517"></a> |
| <span class="sourceLineNo">1518</span> // If servers from prior assignment aren't present, then lets do randomAssignment on regions.<a name="line.1518"></a> |
| <span class="sourceLineNo">1519</span> if (randomAssignRegions.size() > 0) {<a name="line.1519"></a> |
| <span class="sourceLineNo">1520</span> Cluster cluster = createCluster(servers, regions.keySet());<a name="line.1520"></a> |
| <span class="sourceLineNo">1521</span> for (Map.Entry<ServerName, List<RegionInfo>> entry : assignments.entrySet()) {<a name="line.1521"></a> |
| <span class="sourceLineNo">1522</span> ServerName sn = entry.getKey();<a name="line.1522"></a> |
| <span class="sourceLineNo">1523</span> for (RegionInfo region : entry.getValue()) {<a name="line.1523"></a> |
| <span class="sourceLineNo">1524</span> cluster.doAssignRegion(region, sn);<a name="line.1524"></a> |
| <span class="sourceLineNo">1525</span> }<a name="line.1525"></a> |
| <span class="sourceLineNo">1526</span> }<a name="line.1526"></a> |
| <span class="sourceLineNo">1527</span> for (RegionInfo region : randomAssignRegions) {<a name="line.1527"></a> |
| <span class="sourceLineNo">1528</span> ServerName target = randomAssignment(cluster, region, servers);<a name="line.1528"></a> |
| <span class="sourceLineNo">1529</span> assignments.get(target).add(region);<a name="line.1529"></a> |
| <span class="sourceLineNo">1530</span> numRandomAssignments++;<a name="line.1530"></a> |
| <span class="sourceLineNo">1531</span> }<a name="line.1531"></a> |
| <span class="sourceLineNo">1532</span> }<a name="line.1532"></a> |
| <span class="sourceLineNo">1533</span><a name="line.1533"></a> |
| <span class="sourceLineNo">1534</span> String randomAssignMsg = "";<a name="line.1534"></a> |
| <span class="sourceLineNo">1535</span> if (numRandomAssignments > 0) {<a name="line.1535"></a> |
| <span class="sourceLineNo">1536</span> randomAssignMsg =<a name="line.1536"></a> |
| <span class="sourceLineNo">1537</span> numRandomAssignments + " regions were assigned "<a name="line.1537"></a> |
| <span class="sourceLineNo">1538</span> + "to random hosts, since the old hosts for these regions are no "<a name="line.1538"></a> |
| <span class="sourceLineNo">1539</span> + "longer present in the cluster. These hosts were:\n "<a name="line.1539"></a> |
| <span class="sourceLineNo">1540</span> + Joiner.on("\n ").join(oldHostsNoLongerPresent);<a name="line.1540"></a> |
| <span class="sourceLineNo">1541</span> }<a name="line.1541"></a> |
| <span class="sourceLineNo">1542</span><a name="line.1542"></a> |
| <span class="sourceLineNo">1543</span> LOG.info("Reassigned " + regions.size() + " regions. " + numRetainedAssigments<a name="line.1543"></a> |
| <span class="sourceLineNo">1544</span> + " retained the pre-restart assignment. " + randomAssignMsg);<a name="line.1544"></a> |
| <span class="sourceLineNo">1545</span> return assignments;<a name="line.1545"></a> |
| <span class="sourceLineNo">1546</span> }<a name="line.1546"></a> |
| <span class="sourceLineNo">1547</span><a name="line.1547"></a> |
| <span class="sourceLineNo">1548</span> @Override<a name="line.1548"></a> |
| <span class="sourceLineNo">1549</span> public void initialize() throws HBaseIOException{<a name="line.1549"></a> |
| <span class="sourceLineNo">1550</span> }<a name="line.1550"></a> |
| <span class="sourceLineNo">1551</span><a name="line.1551"></a> |
| <span class="sourceLineNo">1552</span> @Override<a name="line.1552"></a> |
| <span class="sourceLineNo">1553</span> public void regionOnline(RegionInfo regionInfo, ServerName sn) {<a name="line.1553"></a> |
| <span class="sourceLineNo">1554</span> }<a name="line.1554"></a> |
| <span class="sourceLineNo">1555</span><a name="line.1555"></a> |
| <span class="sourceLineNo">1556</span> @Override<a name="line.1556"></a> |
| <span class="sourceLineNo">1557</span> public void regionOffline(RegionInfo regionInfo) {<a name="line.1557"></a> |
| <span class="sourceLineNo">1558</span> }<a name="line.1558"></a> |
| <span class="sourceLineNo">1559</span><a name="line.1559"></a> |
| <span class="sourceLineNo">1560</span> @Override<a name="line.1560"></a> |
| <span class="sourceLineNo">1561</span> public boolean isStopped() {<a name="line.1561"></a> |
| <span class="sourceLineNo">1562</span> return stopped;<a name="line.1562"></a> |
| <span class="sourceLineNo">1563</span> }<a name="line.1563"></a> |
| <span class="sourceLineNo">1564</span><a name="line.1564"></a> |
| <span class="sourceLineNo">1565</span> @Override<a name="line.1565"></a> |
| <span class="sourceLineNo">1566</span> public void stop(String why) {<a name="line.1566"></a> |
| <span class="sourceLineNo">1567</span> LOG.info("Load Balancer stop requested: "+why);<a name="line.1567"></a> |
| <span class="sourceLineNo">1568</span> stopped = true;<a name="line.1568"></a> |
| <span class="sourceLineNo">1569</span> }<a name="line.1569"></a> |
| <span class="sourceLineNo">1570</span><a name="line.1570"></a> |
| <span class="sourceLineNo">1571</span> /**<a name="line.1571"></a> |
| <span class="sourceLineNo">1572</span> * Updates the balancer status tag reported to JMX<a name="line.1572"></a> |
| <span class="sourceLineNo">1573</span> */<a name="line.1573"></a> |
| <span class="sourceLineNo">1574</span> public void updateBalancerStatus(boolean status) {<a name="line.1574"></a> |
| <span class="sourceLineNo">1575</span> metricsBalancer.balancerStatus(status);<a name="line.1575"></a> |
| <span class="sourceLineNo">1576</span> }<a name="line.1576"></a> |
| <span class="sourceLineNo">1577</span><a name="line.1577"></a> |
| <span class="sourceLineNo">1578</span> /**<a name="line.1578"></a> |
| <span class="sourceLineNo">1579</span> * Used to assign a single region to a random server.<a name="line.1579"></a> |
| <span class="sourceLineNo">1580</span> */<a name="line.1580"></a> |
| <span class="sourceLineNo">1581</span> private ServerName randomAssignment(Cluster cluster, RegionInfo regionInfo,<a name="line.1581"></a> |
| <span class="sourceLineNo">1582</span> List<ServerName> servers) {<a name="line.1582"></a> |
| <span class="sourceLineNo">1583</span> int numServers = servers.size(); // servers is not null, numServers > 1<a name="line.1583"></a> |
| <span class="sourceLineNo">1584</span> ServerName sn = null;<a name="line.1584"></a> |
| <span class="sourceLineNo">1585</span> final int maxIterations = numServers * 4;<a name="line.1585"></a> |
| <span class="sourceLineNo">1586</span> int iterations = 0;<a name="line.1586"></a> |
| <span class="sourceLineNo">1587</span> List<ServerName> usedSNs = new ArrayList<>(servers.size());<a name="line.1587"></a> |
| <span class="sourceLineNo">1588</span> do {<a name="line.1588"></a> |
| <span class="sourceLineNo">1589</span> int i = RANDOM.nextInt(numServers);<a name="line.1589"></a> |
| <span class="sourceLineNo">1590</span> sn = servers.get(i);<a name="line.1590"></a> |
| <span class="sourceLineNo">1591</span> if (!usedSNs.contains(sn)) {<a name="line.1591"></a> |
| <span class="sourceLineNo">1592</span> usedSNs.add(sn);<a name="line.1592"></a> |
| <span class="sourceLineNo">1593</span> }<a name="line.1593"></a> |
| <span class="sourceLineNo">1594</span> } while (cluster.wouldLowerAvailability(regionInfo, sn)<a name="line.1594"></a> |
| <span class="sourceLineNo">1595</span> && iterations++ < maxIterations);<a name="line.1595"></a> |
| <span class="sourceLineNo">1596</span> if (iterations >= maxIterations) {<a name="line.1596"></a> |
| <span class="sourceLineNo">1597</span> // We have reached the max. Means the servers that we collected is still lowering the<a name="line.1597"></a> |
| <span class="sourceLineNo">1598</span> // availability<a name="line.1598"></a> |
| <span class="sourceLineNo">1599</span> for (ServerName unusedServer : servers) {<a name="line.1599"></a> |
| <span class="sourceLineNo">1600</span> if (!usedSNs.contains(unusedServer)) {<a name="line.1600"></a> |
| <span class="sourceLineNo">1601</span> // check if any other unused server is there for us to use.<a name="line.1601"></a> |
| <span class="sourceLineNo">1602</span> // If so use it. Else we have not other go but to go with one of them<a name="line.1602"></a> |
| <span class="sourceLineNo">1603</span> if (!cluster.wouldLowerAvailability(regionInfo, unusedServer)) {<a name="line.1603"></a> |
| <span class="sourceLineNo">1604</span> sn = unusedServer;<a name="line.1604"></a> |
| <span class="sourceLineNo">1605</span> break;<a name="line.1605"></a> |
| <span class="sourceLineNo">1606</span> }<a name="line.1606"></a> |
| <span class="sourceLineNo">1607</span> }<a name="line.1607"></a> |
| <span class="sourceLineNo">1608</span> }<a name="line.1608"></a> |
| <span class="sourceLineNo">1609</span> }<a name="line.1609"></a> |
| <span class="sourceLineNo">1610</span> cluster.doAssignRegion(regionInfo, sn);<a name="line.1610"></a> |
| <span class="sourceLineNo">1611</span> return sn;<a name="line.1611"></a> |
| <span class="sourceLineNo">1612</span> }<a name="line.1612"></a> |
| <span class="sourceLineNo">1613</span><a name="line.1613"></a> |
| <span class="sourceLineNo">1614</span> /**<a name="line.1614"></a> |
| <span class="sourceLineNo">1615</span> * Round robin a list of regions to a list of servers<a name="line.1615"></a> |
| <span class="sourceLineNo">1616</span> */<a name="line.1616"></a> |
| <span class="sourceLineNo">1617</span> private void roundRobinAssignment(Cluster cluster, List<RegionInfo> regions,<a name="line.1617"></a> |
| <span class="sourceLineNo">1618</span> List<ServerName> servers, Map<ServerName, List<RegionInfo>> assignments) {<a name="line.1618"></a> |
| <span class="sourceLineNo">1619</span> List<RegionInfo> unassignedRegions = new ArrayList<>();<a name="line.1619"></a> |
| <span class="sourceLineNo">1620</span> int numServers = servers.size();<a name="line.1620"></a> |
| <span class="sourceLineNo">1621</span> int numRegions = regions.size();<a name="line.1621"></a> |
| <span class="sourceLineNo">1622</span> int max = (int) Math.ceil((float) numRegions / numServers);<a name="line.1622"></a> |
| <span class="sourceLineNo">1623</span> int serverIdx = 0;<a name="line.1623"></a> |
| <span class="sourceLineNo">1624</span> if (numServers > 1) {<a name="line.1624"></a> |
| <span class="sourceLineNo">1625</span> serverIdx = RANDOM.nextInt(numServers);<a name="line.1625"></a> |
| <span class="sourceLineNo">1626</span> }<a name="line.1626"></a> |
| <span class="sourceLineNo">1627</span> int regionIdx = 0;<a name="line.1627"></a> |
| <span class="sourceLineNo">1628</span> for (int j = 0; j < numServers; j++) {<a name="line.1628"></a> |
| <span class="sourceLineNo">1629</span> ServerName server = servers.get((j + serverIdx) % numServers);<a name="line.1629"></a> |
| <span class="sourceLineNo">1630</span> List<RegionInfo> serverRegions = new ArrayList<>(max);<a name="line.1630"></a> |
| <span class="sourceLineNo">1631</span> for (int i = regionIdx; i < numRegions; i += numServers) {<a name="line.1631"></a> |
| <span class="sourceLineNo">1632</span> RegionInfo region = regions.get(i % numRegions);<a name="line.1632"></a> |
| <span class="sourceLineNo">1633</span> if (cluster.wouldLowerAvailability(region, server)) {<a name="line.1633"></a> |
| <span class="sourceLineNo">1634</span> unassignedRegions.add(region);<a name="line.1634"></a> |
| <span class="sourceLineNo">1635</span> } else {<a name="line.1635"></a> |
| <span class="sourceLineNo">1636</span> serverRegions.add(region);<a name="line.1636"></a> |
| <span class="sourceLineNo">1637</span> cluster.doAssignRegion(region, server);<a name="line.1637"></a> |
| <span class="sourceLineNo">1638</span> }<a name="line.1638"></a> |
| <span class="sourceLineNo">1639</span> }<a name="line.1639"></a> |
| <span class="sourceLineNo">1640</span> assignments.put(server, serverRegions);<a name="line.1640"></a> |
| <span class="sourceLineNo">1641</span> regionIdx++;<a name="line.1641"></a> |
| <span class="sourceLineNo">1642</span> }<a name="line.1642"></a> |
| <span class="sourceLineNo">1643</span><a name="line.1643"></a> |
| <span class="sourceLineNo">1644</span><a name="line.1644"></a> |
| <span class="sourceLineNo">1645</span> List<RegionInfo> lastFewRegions = new ArrayList<>();<a name="line.1645"></a> |
| <span class="sourceLineNo">1646</span> // assign the remaining by going through the list and try to assign to servers one-by-one<a name="line.1646"></a> |
| <span class="sourceLineNo">1647</span> serverIdx = RANDOM.nextInt(numServers);<a name="line.1647"></a> |
| <span class="sourceLineNo">1648</span> OUTER : for (RegionInfo region : unassignedRegions) {<a name="line.1648"></a> |
| <span class="sourceLineNo">1649</span> boolean assigned = false;<a name="line.1649"></a> |
| <span class="sourceLineNo">1650</span> INNER : for (int j = 0; j < numServers; j++) { // try all servers one by one<a name="line.1650"></a> |
| <span class="sourceLineNo">1651</span> ServerName server = servers.get((j + serverIdx) % numServers);<a name="line.1651"></a> |
| <span class="sourceLineNo">1652</span> if (cluster.wouldLowerAvailability(region, server)) {<a name="line.1652"></a> |
| <span class="sourceLineNo">1653</span> continue INNER;<a name="line.1653"></a> |
| <span class="sourceLineNo">1654</span> } else {<a name="line.1654"></a> |
| <span class="sourceLineNo">1655</span> assignments.computeIfAbsent(server, k -> new ArrayList<>()).add(region);<a name="line.1655"></a> |
| <span class="sourceLineNo">1656</span> cluster.doAssignRegion(region, server);<a name="line.1656"></a> |
| <span class="sourceLineNo">1657</span> serverIdx = (j + serverIdx + 1) % numServers; //remain from next server<a name="line.1657"></a> |
| <span class="sourceLineNo">1658</span> assigned = true;<a name="line.1658"></a> |
| <span class="sourceLineNo">1659</span> break;<a name="line.1659"></a> |
| <span class="sourceLineNo">1660</span> }<a name="line.1660"></a> |
| <span class="sourceLineNo">1661</span> }<a name="line.1661"></a> |
| <span class="sourceLineNo">1662</span> if (!assigned) {<a name="line.1662"></a> |
| <span class="sourceLineNo">1663</span> lastFewRegions.add(region);<a name="line.1663"></a> |
| <span class="sourceLineNo">1664</span> }<a name="line.1664"></a> |
| <span class="sourceLineNo">1665</span> }<a name="line.1665"></a> |
| <span class="sourceLineNo">1666</span> // just sprinkle the rest of the regions on random regionservers. The balanceCluster will<a name="line.1666"></a> |
| <span class="sourceLineNo">1667</span> // make it optimal later. we can end up with this if numReplicas > numServers.<a name="line.1667"></a> |
| <span class="sourceLineNo">1668</span> for (RegionInfo region : lastFewRegions) {<a name="line.1668"></a> |
| <span class="sourceLineNo">1669</span> int i = RANDOM.nextInt(numServers);<a name="line.1669"></a> |
| <span class="sourceLineNo">1670</span> ServerName server = servers.get(i);<a name="line.1670"></a> |
| <span class="sourceLineNo">1671</span> assignments.computeIfAbsent(server, k -> new ArrayList<>()).add(region);<a name="line.1671"></a> |
| <span class="sourceLineNo">1672</span> cluster.doAssignRegion(region, server);<a name="line.1672"></a> |
| <span class="sourceLineNo">1673</span> }<a name="line.1673"></a> |
| <span class="sourceLineNo">1674</span> }<a name="line.1674"></a> |
| <span class="sourceLineNo">1675</span><a name="line.1675"></a> |
| <span class="sourceLineNo">1676</span> protected Map<ServerName, List<RegionInfo>> getRegionAssignmentsByServer(<a name="line.1676"></a> |
| <span class="sourceLineNo">1677</span> Collection<RegionInfo> regions) {<a name="line.1677"></a> |
| <span class="sourceLineNo">1678</span> if (this.services != null && this.services.getAssignmentManager() != null) {<a name="line.1678"></a> |
| <span class="sourceLineNo">1679</span> return this.services.getAssignmentManager().getSnapShotOfAssignment(regions);<a name="line.1679"></a> |
| <span class="sourceLineNo">1680</span> } else {<a name="line.1680"></a> |
| <span class="sourceLineNo">1681</span> return new HashMap<>();<a name="line.1681"></a> |
| <span class="sourceLineNo">1682</span> }<a name="line.1682"></a> |
| <span class="sourceLineNo">1683</span> }<a name="line.1683"></a> |
| <span class="sourceLineNo">1684</span><a name="line.1684"></a> |
| <span class="sourceLineNo">1685</span> private Map<ServerName, List<RegionInfo>> toEnsumbleTableLoad(<a name="line.1685"></a> |
| <span class="sourceLineNo">1686</span> Map<TableName, Map<ServerName, List<RegionInfo>>> LoadOfAllTable) {<a name="line.1686"></a> |
| <span class="sourceLineNo">1687</span> Map<ServerName, List<RegionInfo>> returnMap = new TreeMap<>();<a name="line.1687"></a> |
| <span class="sourceLineNo">1688</span> for (Map<ServerName, List<RegionInfo>> serverNameListMap : LoadOfAllTable.values()) {<a name="line.1688"></a> |
| <span class="sourceLineNo">1689</span> serverNameListMap.forEach((serverName, regionInfoList) -> {<a name="line.1689"></a> |
| <span class="sourceLineNo">1690</span> List<RegionInfo> regionInfos =<a name="line.1690"></a> |
| <span class="sourceLineNo">1691</span> returnMap.computeIfAbsent(serverName, k -> new ArrayList<>());<a name="line.1691"></a> |
| <span class="sourceLineNo">1692</span> regionInfos.addAll(regionInfoList);<a name="line.1692"></a> |
| <span class="sourceLineNo">1693</span> });<a name="line.1693"></a> |
| <span class="sourceLineNo">1694</span> }<a name="line.1694"></a> |
| <span class="sourceLineNo">1695</span> return returnMap;<a name="line.1695"></a> |
| <span class="sourceLineNo">1696</span> }<a name="line.1696"></a> |
| <span class="sourceLineNo">1697</span><a name="line.1697"></a> |
| <span class="sourceLineNo">1698</span> @Override<a name="line.1698"></a> |
| <span class="sourceLineNo">1699</span> public abstract List<RegionPlan> balanceTable(TableName tableName,<a name="line.1699"></a> |
| <span class="sourceLineNo">1700</span> Map<ServerName, List<RegionInfo>> loadOfOneTable);<a name="line.1700"></a> |
| <span class="sourceLineNo">1701</span><a name="line.1701"></a> |
| <span class="sourceLineNo">1702</span> @Override<a name="line.1702"></a> |
| <span class="sourceLineNo">1703</span> public List<RegionPlan><a name="line.1703"></a> |
| <span class="sourceLineNo">1704</span> balanceCluster(Map<TableName, Map<ServerName, List<RegionInfo>>> loadOfAllTable) {<a name="line.1704"></a> |
| <span class="sourceLineNo">1705</span> if (isByTable) {<a name="line.1705"></a> |
| <span class="sourceLineNo">1706</span> List<RegionPlan> result = new ArrayList<>();<a name="line.1706"></a> |
| <span class="sourceLineNo">1707</span> loadOfAllTable.forEach((tableName, loadOfOneTable) -> {<a name="line.1707"></a> |
| <span class="sourceLineNo">1708</span> LOG.info("Start Generate Balance plan for table: " + tableName);<a name="line.1708"></a> |
| <span class="sourceLineNo">1709</span> List<RegionPlan> partialPlans = balanceTable(tableName, loadOfOneTable);<a name="line.1709"></a> |
| <span class="sourceLineNo">1710</span> if (partialPlans != null) {<a name="line.1710"></a> |
| <span class="sourceLineNo">1711</span> result.addAll(partialPlans);<a name="line.1711"></a> |
| <span class="sourceLineNo">1712</span> }<a name="line.1712"></a> |
| <span class="sourceLineNo">1713</span> });<a name="line.1713"></a> |
| <span class="sourceLineNo">1714</span> return result;<a name="line.1714"></a> |
| <span class="sourceLineNo">1715</span> } else {<a name="line.1715"></a> |
| <span class="sourceLineNo">1716</span> LOG.info("Start Generate Balance plan for cluster.");<a name="line.1716"></a> |
| <span class="sourceLineNo">1717</span> return balanceTable(HConstants.ENSEMBLE_TABLE_NAME, toEnsumbleTableLoad(loadOfAllTable));<a name="line.1717"></a> |
| <span class="sourceLineNo">1718</span> }<a name="line.1718"></a> |
| <span class="sourceLineNo">1719</span> }<a name="line.1719"></a> |
| <span class="sourceLineNo">1720</span><a name="line.1720"></a> |
| <span class="sourceLineNo">1721</span> @Override<a name="line.1721"></a> |
| <span class="sourceLineNo">1722</span> public void onConfigurationChange(Configuration conf) {<a name="line.1722"></a> |
| <span class="sourceLineNo">1723</span> }<a name="line.1723"></a> |
| <span class="sourceLineNo">1724</span>}<a name="line.1724"></a> |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| </pre> |
| </div> |
| </body> |
| </html> |
