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From git-site-r...@apache.org
Subject [14/26] hbase-site git commit: Published site at .
Date Wed, 20 Sep 2017 13:06:14 GMT
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/7d90d02f/devapidocs/src-html/org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.Cluster.Action.Type.html
----------------------------------------------------------------------
diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.Cluster.Action.Type.html b/devapidocs/src-html/org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.Cluster.Action.Type.html
index 07b6ae0..21f2337 100644
--- a/devapidocs/src-html/org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.Cluster.Action.Type.html
+++ b/devapidocs/src-html/org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.Cluster.Action.Type.html
@@ -47,1510 +47,1527 @@
 <span class="sourceLineNo">039</span>import org.apache.commons.logging.LogFactory;<a name="line.39"></a>
 <span class="sourceLineNo">040</span>import org.apache.hadoop.conf.Configuration;<a name="line.40"></a>
 <span class="sourceLineNo">041</span>import org.apache.hadoop.hbase.ClusterStatus;<a name="line.41"></a>
-<span class="sourceLineNo">042</span>import org.apache.hadoop.hbase.HBaseIOException;<a name="line.42"></a>
-<span class="sourceLineNo">043</span>import org.apache.hadoop.hbase.HConstants;<a name="line.43"></a>
-<span class="sourceLineNo">044</span>import org.apache.hadoop.hbase.HDFSBlocksDistribution;<a name="line.44"></a>
-<span class="sourceLineNo">045</span>import org.apache.hadoop.hbase.HRegionInfo;<a name="line.45"></a>
-<span class="sourceLineNo">046</span>import org.apache.hadoop.hbase.ServerLoad;<a name="line.46"></a>
-<span class="sourceLineNo">047</span>import org.apache.hadoop.hbase.ServerName;<a name="line.47"></a>
-<span class="sourceLineNo">048</span>import org.apache.hadoop.hbase.TableName;<a name="line.48"></a>
-<span class="sourceLineNo">049</span>import org.apache.hadoop.hbase.client.RegionReplicaUtil;<a name="line.49"></a>
-<span class="sourceLineNo">050</span>import org.apache.hadoop.hbase.master.LoadBalancer;<a name="line.50"></a>
-<span class="sourceLineNo">051</span>import org.apache.hadoop.hbase.master.MasterServices;<a name="line.51"></a>
-<span class="sourceLineNo">052</span>import org.apache.hadoop.hbase.master.RackManager;<a name="line.52"></a>
-<span class="sourceLineNo">053</span>import org.apache.hadoop.hbase.master.RegionPlan;<a name="line.53"></a>
-<span class="sourceLineNo">054</span>import org.apache.hadoop.hbase.master.balancer.BaseLoadBalancer.Cluster.Action.Type;<a name="line.54"></a>
-<span class="sourceLineNo">055</span><a name="line.55"></a>
-<span class="sourceLineNo">056</span>import org.apache.hadoop.hbase.shaded.com.google.common.annotations.VisibleForTesting;<a name="line.56"></a>
-<span class="sourceLineNo">057</span>import org.apache.hadoop.hbase.shaded.com.google.common.base.Joiner;<a name="line.57"></a>
-<span class="sourceLineNo">058</span>import org.apache.hadoop.hbase.shaded.com.google.common.collect.ArrayListMultimap;<a name="line.58"></a>
-<span class="sourceLineNo">059</span>import org.apache.hadoop.hbase.shaded.com.google.common.collect.Lists;<a name="line.59"></a>
-<span class="sourceLineNo">060</span>import org.apache.hadoop.hbase.shaded.com.google.common.collect.Sets;<a name="line.60"></a>
-<span class="sourceLineNo">061</span><a name="line.61"></a>
-<span class="sourceLineNo">062</span>/**<a name="line.62"></a>
-<span class="sourceLineNo">063</span> * The base class for load balancers. It provides the the functions used to by<a name="line.63"></a>
-<span class="sourceLineNo">064</span> * {@link org.apache.hadoop.hbase.master.assignment.AssignmentManager} to assign regions<a name="line.64"></a>
-<span class="sourceLineNo">065</span> * in the edge cases. It doesn't provide an implementation of the<a name="line.65"></a>
-<span class="sourceLineNo">066</span> * actual balancing algorithm.<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>public abstract class BaseLoadBalancer implements LoadBalancer {<a name="line.69"></a>
-<span class="sourceLineNo">070</span>  protected static final int MIN_SERVER_BALANCE = 2;<a name="line.70"></a>
-<span class="sourceLineNo">071</span>  private volatile boolean stopped = false;<a name="line.71"></a>
-<span class="sourceLineNo">072</span><a name="line.72"></a>
-<span class="sourceLineNo">073</span>  private static final List&lt;HRegionInfo&gt; EMPTY_REGION_LIST = new ArrayList&lt;&gt;(0);<a name="line.73"></a>
-<span class="sourceLineNo">074</span><a name="line.74"></a>
-<span class="sourceLineNo">075</span>  static final Predicate&lt;ServerLoad&gt; IDLE_SERVER_PREDICATOR<a name="line.75"></a>
-<span class="sourceLineNo">076</span>    = load -&gt; load.getNumberOfRegions() == 0;<a name="line.76"></a>
-<span class="sourceLineNo">077</span><a name="line.77"></a>
-<span class="sourceLineNo">078</span>  protected final RegionLocationFinder regionFinder = new RegionLocationFinder();<a name="line.78"></a>
-<span class="sourceLineNo">079</span><a name="line.79"></a>
-<span class="sourceLineNo">080</span>  private static class DefaultRackManager extends RackManager {<a name="line.80"></a>
-<span class="sourceLineNo">081</span>    @Override<a name="line.81"></a>
-<span class="sourceLineNo">082</span>    public String getRack(ServerName server) {<a name="line.82"></a>
-<span class="sourceLineNo">083</span>      return UNKNOWN_RACK;<a name="line.83"></a>
-<span class="sourceLineNo">084</span>    }<a name="line.84"></a>
-<span class="sourceLineNo">085</span>  }<a name="line.85"></a>
-<span class="sourceLineNo">086</span><a name="line.86"></a>
-<span class="sourceLineNo">087</span>  /**<a name="line.87"></a>
-<span class="sourceLineNo">088</span>   * The constructor that uses the basic MetricsBalancer<a name="line.88"></a>
-<span class="sourceLineNo">089</span>   */<a name="line.89"></a>
-<span class="sourceLineNo">090</span>  protected BaseLoadBalancer() {<a name="line.90"></a>
-<span class="sourceLineNo">091</span>    metricsBalancer = new MetricsBalancer();<a name="line.91"></a>
-<span class="sourceLineNo">092</span>  }<a name="line.92"></a>
-<span class="sourceLineNo">093</span><a name="line.93"></a>
-<span class="sourceLineNo">094</span>  /**<a name="line.94"></a>
-<span class="sourceLineNo">095</span>   * This Constructor accepts an instance of MetricsBalancer,<a name="line.95"></a>
-<span class="sourceLineNo">096</span>   * which will be used instead of creating a new one<a name="line.96"></a>
-<span class="sourceLineNo">097</span>   */<a name="line.97"></a>
-<span class="sourceLineNo">098</span>  protected BaseLoadBalancer(MetricsBalancer metricsBalancer) {<a name="line.98"></a>
-<span class="sourceLineNo">099</span>    this.metricsBalancer = (metricsBalancer != null) ? metricsBalancer : new MetricsBalancer();<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>  /**<a name="line.102"></a>
-<span class="sourceLineNo">103</span>   * An efficient array based implementation similar to ClusterState for keeping<a name="line.103"></a>
-<span class="sourceLineNo">104</span>   * the status of the cluster in terms of region assignment and distribution.<a name="line.104"></a>
-<span class="sourceLineNo">105</span>   * LoadBalancers, such as StochasticLoadBalancer uses this Cluster object because of<a name="line.105"></a>
-<span class="sourceLineNo">106</span>   * hundreds of thousands of hashmap manipulations are very costly, which is why this<a name="line.106"></a>
-<span class="sourceLineNo">107</span>   * class uses mostly indexes and arrays.<a name="line.107"></a>
-<span class="sourceLineNo">108</span>   *<a name="line.108"></a>
-<span class="sourceLineNo">109</span>   * Cluster tracks a list of unassigned regions, region assignments, and the server<a name="line.109"></a>
-<span class="sourceLineNo">110</span>   * topology in terms of server names, hostnames and racks.<a name="line.110"></a>
-<span class="sourceLineNo">111</span>   */<a name="line.111"></a>
-<span class="sourceLineNo">112</span>  protected static class Cluster {<a name="line.112"></a>
-<span class="sourceLineNo">113</span>    ServerName[] servers;<a name="line.113"></a>
-<span class="sourceLineNo">114</span>    String[] hosts; // ServerName uniquely identifies a region server. multiple RS can run on the same host<a name="line.114"></a>
-<span class="sourceLineNo">115</span>    String[] racks;<a name="line.115"></a>
-<span class="sourceLineNo">116</span>    boolean multiServersPerHost = false; // whether or not any host has more than one server<a name="line.116"></a>
-<span class="sourceLineNo">117</span><a name="line.117"></a>
-<span class="sourceLineNo">118</span>    ArrayList&lt;String&gt; tables;<a name="line.118"></a>
-<span class="sourceLineNo">119</span>    HRegionInfo[] regions;<a name="line.119"></a>
-<span class="sourceLineNo">120</span>    Deque&lt;BalancerRegionLoad&gt;[] regionLoads;<a name="line.120"></a>
-<span class="sourceLineNo">121</span>    private RegionLocationFinder regionFinder;<a name="line.121"></a>
-<span class="sourceLineNo">122</span><a name="line.122"></a>
-<span class="sourceLineNo">123</span>    int[][] regionLocations; //regionIndex -&gt; list of serverIndex sorted by locality<a name="line.123"></a>
-<span class="sourceLineNo">124</span><a name="line.124"></a>
-<span class="sourceLineNo">125</span>    int[]   serverIndexToHostIndex;      //serverIndex -&gt; host index<a name="line.125"></a>
-<span class="sourceLineNo">126</span>    int[]   serverIndexToRackIndex;      //serverIndex -&gt; rack index<a name="line.126"></a>
-<span class="sourceLineNo">127</span><a name="line.127"></a>
-<span class="sourceLineNo">128</span>    int[][] regionsPerServer;            //serverIndex -&gt; region list<a name="line.128"></a>
-<span class="sourceLineNo">129</span>    int[][] regionsPerHost;              //hostIndex -&gt; list of regions<a name="line.129"></a>
-<span class="sourceLineNo">130</span>    int[][] regionsPerRack;              //rackIndex -&gt; region list<a name="line.130"></a>
-<span class="sourceLineNo">131</span>    int[][] primariesOfRegionsPerServer; //serverIndex -&gt; sorted list of regions by primary region index<a name="line.131"></a>
-<span class="sourceLineNo">132</span>    int[][] primariesOfRegionsPerHost;   //hostIndex -&gt; sorted list of regions by primary region index<a name="line.132"></a>
-<span class="sourceLineNo">133</span>    int[][] primariesOfRegionsPerRack;   //rackIndex -&gt; sorted list of regions by primary region index<a name="line.133"></a>
-<span class="sourceLineNo">134</span><a name="line.134"></a>
-<span class="sourceLineNo">135</span>    int[][] serversPerHost;              //hostIndex -&gt; list of server indexes<a name="line.135"></a>
-<span class="sourceLineNo">136</span>    int[][] serversPerRack;              //rackIndex -&gt; list of server indexes<a name="line.136"></a>
-<span class="sourceLineNo">137</span>    int[]   regionIndexToServerIndex;    //regionIndex -&gt; serverIndex<a name="line.137"></a>
-<span class="sourceLineNo">138</span>    int[]   initialRegionIndexToServerIndex;    //regionIndex -&gt; serverIndex (initial cluster state)<a name="line.138"></a>
-<span class="sourceLineNo">139</span>    int[]   regionIndexToTableIndex;     //regionIndex -&gt; tableIndex<a name="line.139"></a>
-<span class="sourceLineNo">140</span>    int[][] numRegionsPerServerPerTable; //serverIndex -&gt; tableIndex -&gt; # regions<a name="line.140"></a>
-<span class="sourceLineNo">141</span>    int[]   numMaxRegionsPerTable;       //tableIndex -&gt; max number of regions in a single RS<a name="line.141"></a>
-<span class="sourceLineNo">142</span>    int[]   regionIndexToPrimaryIndex;   //regionIndex -&gt; regionIndex of the primary<a name="line.142"></a>
-<span class="sourceLineNo">143</span>    boolean hasRegionReplicas = false;   //whether there is regions with replicas<a name="line.143"></a>
-<span class="sourceLineNo">144</span><a name="line.144"></a>
-<span class="sourceLineNo">145</span>    Integer[] serverIndicesSortedByRegionCount;<a name="line.145"></a>
-<span class="sourceLineNo">146</span>    Integer[] serverIndicesSortedByLocality;<a name="line.146"></a>
-<span class="sourceLineNo">147</span><a name="line.147"></a>
-<span class="sourceLineNo">148</span>    Map&lt;String, Integer&gt; serversToIndex;<a name="line.148"></a>
-<span class="sourceLineNo">149</span>    Map&lt;String, Integer&gt; hostsToIndex;<a name="line.149"></a>
-<span class="sourceLineNo">150</span>    Map&lt;String, Integer&gt; racksToIndex;<a name="line.150"></a>
-<span class="sourceLineNo">151</span>    Map&lt;String, Integer&gt; tablesToIndex;<a name="line.151"></a>
-<span class="sourceLineNo">152</span>    Map&lt;HRegionInfo, Integer&gt; regionsToIndex;<a name="line.152"></a>
-<span class="sourceLineNo">153</span>    float[] localityPerServer;<a name="line.153"></a>
-<span class="sourceLineNo">154</span><a name="line.154"></a>
-<span class="sourceLineNo">155</span>    int numServers;<a name="line.155"></a>
-<span class="sourceLineNo">156</span>    int numHosts;<a name="line.156"></a>
-<span class="sourceLineNo">157</span>    int numRacks;<a name="line.157"></a>
-<span class="sourceLineNo">158</span>    int numTables;<a name="line.158"></a>
-<span class="sourceLineNo">159</span>    int numRegions;<a name="line.159"></a>
-<span class="sourceLineNo">160</span><a name="line.160"></a>
-<span class="sourceLineNo">161</span>    int numMovedRegions = 0; //num moved regions from the initial configuration<a name="line.161"></a>
-<span class="sourceLineNo">162</span>    Map&lt;ServerName, List&lt;HRegionInfo&gt;&gt; clusterState;<a name="line.162"></a>
-<span class="sourceLineNo">163</span><a name="line.163"></a>
-<span class="sourceLineNo">164</span>    protected final RackManager rackManager;<a name="line.164"></a>
-<span class="sourceLineNo">165</span>    // Maps region -&gt; rackIndex -&gt; locality of region on rack<a name="line.165"></a>
-<span class="sourceLineNo">166</span>    private float[][] rackLocalities;<a name="line.166"></a>
-<span class="sourceLineNo">167</span>    // Maps localityType -&gt; region -&gt; [server|rack]Index with highest locality<a name="line.167"></a>
-<span class="sourceLineNo">168</span>    private int[][] regionsToMostLocalEntities;<a name="line.168"></a>
-<span class="sourceLineNo">169</span><a name="line.169"></a>
-<span class="sourceLineNo">170</span>    protected Cluster(<a name="line.170"></a>
-<span class="sourceLineNo">171</span>        Map&lt;ServerName, List&lt;HRegionInfo&gt;&gt; clusterState,<a name="line.171"></a>
-<span class="sourceLineNo">172</span>        Map&lt;String, Deque&lt;BalancerRegionLoad&gt;&gt; loads,<a name="line.172"></a>
-<span class="sourceLineNo">173</span>        RegionLocationFinder regionFinder,<a name="line.173"></a>
-<span class="sourceLineNo">174</span>        RackManager rackManager) {<a name="line.174"></a>
-<span class="sourceLineNo">175</span>      this(null, clusterState, loads, regionFinder, rackManager);<a name="line.175"></a>
-<span class="sourceLineNo">176</span>    }<a name="line.176"></a>
-<span class="sourceLineNo">177</span><a name="line.177"></a>
-<span class="sourceLineNo">178</span>    @SuppressWarnings("unchecked")<a name="line.178"></a>
-<span class="sourceLineNo">179</span>    protected Cluster(<a name="line.179"></a>
-<span class="sourceLineNo">180</span>        Collection&lt;HRegionInfo&gt; unassignedRegions,<a name="line.180"></a>
-<span class="sourceLineNo">181</span>        Map&lt;ServerName, List&lt;HRegionInfo&gt;&gt; clusterState,<a name="line.181"></a>
-<span class="sourceLineNo">182</span>        Map&lt;String, Deque&lt;BalancerRegionLoad&gt;&gt; loads,<a name="line.182"></a>
-<span class="sourceLineNo">183</span>        RegionLocationFinder regionFinder,<a name="line.183"></a>
-<span class="sourceLineNo">184</span>        RackManager rackManager) {<a name="line.184"></a>
-<span class="sourceLineNo">185</span><a name="line.185"></a>
-<span class="sourceLineNo">186</span>      if (unassignedRegions == null) {<a name="line.186"></a>
-<span class="sourceLineNo">187</span>        unassignedRegions = EMPTY_REGION_LIST;<a name="line.187"></a>
-<span class="sourceLineNo">188</span>      }<a name="line.188"></a>
-<span class="sourceLineNo">189</span><a name="line.189"></a>
-<span class="sourceLineNo">190</span>      serversToIndex = new HashMap&lt;&gt;();<a name="line.190"></a>
-<span class="sourceLineNo">191</span>      hostsToIndex = new HashMap&lt;&gt;();<a name="line.191"></a>
-<span class="sourceLineNo">192</span>      racksToIndex = new HashMap&lt;&gt;();<a name="line.192"></a>
-<span class="sourceLineNo">193</span>      tablesToIndex = new HashMap&lt;&gt;();<a name="line.193"></a>
-<span class="sourceLineNo">194</span><a name="line.194"></a>
-<span class="sourceLineNo">195</span>      //TODO: We should get the list of tables from master<a name="line.195"></a>
-<span class="sourceLineNo">196</span>      tables = new ArrayList&lt;&gt;();<a name="line.196"></a>
-<span class="sourceLineNo">197</span>      this.rackManager = rackManager != null ? rackManager : new DefaultRackManager();<a name="line.197"></a>
-<span class="sourceLineNo">198</span><a name="line.198"></a>
-<span class="sourceLineNo">199</span>      numRegions = 0;<a name="line.199"></a>
+<span class="sourceLineNo">042</span>import org.apache.hadoop.hbase.HBaseConfiguration;<a name="line.42"></a>
+<span class="sourceLineNo">043</span>import org.apache.hadoop.hbase.HBaseIOException;<a name="line.43"></a>
+<span class="sourceLineNo">044</span>import org.apache.hadoop.hbase.HConstants;<a name="line.44"></a>
+<span class="sourceLineNo">045</span>import org.apache.hadoop.hbase.HDFSBlocksDistribution;<a name="line.45"></a>
+<span class="sourceLineNo">046</span>import org.apache.hadoop.hbase.HRegionInfo;<a name="line.46"></a>
+<span class="sourceLineNo">047</span>import org.apache.hadoop.hbase.ServerLoad;<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.RegionReplicaUtil;<a name="line.50"></a>
+<span class="sourceLineNo">051</span>import org.apache.hadoop.hbase.master.LoadBalancer;<a name="line.51"></a>
+<span class="sourceLineNo">052</span>import org.apache.hadoop.hbase.master.MasterServices;<a name="line.52"></a>
+<span class="sourceLineNo">053</span>import org.apache.hadoop.hbase.master.RackManager;<a name="line.53"></a>
+<span class="sourceLineNo">054</span>import org.apache.hadoop.hbase.master.RegionPlan;<a name="line.54"></a>
+<span class="sourceLineNo">055</span>import org.apache.hadoop.hbase.master.balancer.BaseLoadBalancer.Cluster.Action.Type;<a name="line.55"></a>
+<span class="sourceLineNo">056</span><a name="line.56"></a>
+<span class="sourceLineNo">057</span>import org.apache.hadoop.hbase.shaded.com.google.common.annotations.VisibleForTesting;<a name="line.57"></a>
+<span class="sourceLineNo">058</span>import org.apache.hadoop.hbase.shaded.com.google.common.base.Joiner;<a name="line.58"></a>
+<span class="sourceLineNo">059</span>import org.apache.hadoop.hbase.shaded.com.google.common.collect.ArrayListMultimap;<a name="line.59"></a>
+<span class="sourceLineNo">060</span>import org.apache.hadoop.hbase.shaded.com.google.common.collect.Lists;<a name="line.60"></a>
+<span class="sourceLineNo">061</span>import org.apache.hadoop.hbase.shaded.com.google.common.collect.Sets;<a name="line.61"></a>
+<span class="sourceLineNo">062</span><a name="line.62"></a>
+<span class="sourceLineNo">063</span>/**<a name="line.63"></a>
+<span class="sourceLineNo">064</span> * The base class for load balancers. It provides the the functions used to by<a name="line.64"></a>
+<span class="sourceLineNo">065</span> * {@link org.apache.hadoop.hbase.master.assignment.AssignmentManager} to assign regions<a name="line.65"></a>
+<span class="sourceLineNo">066</span> * in the edge cases. It doesn't provide an implementation of the<a name="line.66"></a>
+<span class="sourceLineNo">067</span> * actual balancing algorithm.<a name="line.67"></a>
+<span class="sourceLineNo">068</span> *<a name="line.68"></a>
+<span class="sourceLineNo">069</span> */<a name="line.69"></a>
+<span class="sourceLineNo">070</span>public abstract class BaseLoadBalancer implements LoadBalancer {<a name="line.70"></a>
+<span class="sourceLineNo">071</span>  protected static final int MIN_SERVER_BALANCE = 2;<a name="line.71"></a>
+<span class="sourceLineNo">072</span>  private volatile boolean stopped = false;<a name="line.72"></a>
+<span class="sourceLineNo">073</span><a name="line.73"></a>
+<span class="sourceLineNo">074</span>  private static final List&lt;HRegionInfo&gt; EMPTY_REGION_LIST = new ArrayList&lt;&gt;(0);<a name="line.74"></a>
+<span class="sourceLineNo">075</span><a name="line.75"></a>
+<span class="sourceLineNo">076</span>  static final Predicate&lt;ServerLoad&gt; IDLE_SERVER_PREDICATOR<a name="line.76"></a>
+<span class="sourceLineNo">077</span>    = load -&gt; load.getNumberOfRegions() == 0;<a name="line.77"></a>
+<span class="sourceLineNo">078</span><a name="line.78"></a>
+<span class="sourceLineNo">079</span>  protected RegionLocationFinder regionFinder;<a name="line.79"></a>
+<span class="sourceLineNo">080</span>  protected boolean useRegionFinder;<a name="line.80"></a>
+<span class="sourceLineNo">081</span><a name="line.81"></a>
+<span class="sourceLineNo">082</span>  private static class DefaultRackManager extends RackManager {<a name="line.82"></a>
+<span class="sourceLineNo">083</span>    @Override<a name="line.83"></a>
+<span class="sourceLineNo">084</span>    public String getRack(ServerName server) {<a name="line.84"></a>
+<span class="sourceLineNo">085</span>      return UNKNOWN_RACK;<a name="line.85"></a>
+<span class="sourceLineNo">086</span>    }<a name="line.86"></a>
+<span class="sourceLineNo">087</span>  }<a name="line.87"></a>
+<span class="sourceLineNo">088</span><a name="line.88"></a>
+<span class="sourceLineNo">089</span>  /**<a name="line.89"></a>
+<span class="sourceLineNo">090</span>   * The constructor that uses the basic MetricsBalancer<a name="line.90"></a>
+<span class="sourceLineNo">091</span>   */<a name="line.91"></a>
+<span class="sourceLineNo">092</span>  protected BaseLoadBalancer() {<a name="line.92"></a>
+<span class="sourceLineNo">093</span>    metricsBalancer = new MetricsBalancer();<a name="line.93"></a>
+<span class="sourceLineNo">094</span>    createRegionFinder();<a name="line.94"></a>
+<span class="sourceLineNo">095</span>  }<a name="line.95"></a>
+<span class="sourceLineNo">096</span><a name="line.96"></a>
+<span class="sourceLineNo">097</span>  /**<a name="line.97"></a>
+<span class="sourceLineNo">098</span>   * This Constructor accepts an instance of MetricsBalancer,<a name="line.98"></a>
+<span class="sourceLineNo">099</span>   * which will be used instead of creating a new one<a name="line.99"></a>
+<span class="sourceLineNo">100</span>   */<a name="line.100"></a>
+<span class="sourceLineNo">101</span>  protected BaseLoadBalancer(MetricsBalancer metricsBalancer) {<a name="line.101"></a>
+<span class="sourceLineNo">102</span>    this.metricsBalancer = (metricsBalancer != null) ? metricsBalancer : new MetricsBalancer();<a name="line.102"></a>
+<span class="sourceLineNo">103</span>    createRegionFinder();<a name="line.103"></a>
+<span class="sourceLineNo">104</span>  }<a name="line.104"></a>
+<span class="sourceLineNo">105</span><a name="line.105"></a>
+<span class="sourceLineNo">106</span>  private void createRegionFinder() {<a name="line.106"></a>
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+<span class="sourceLineNo">110</span>    }<a name="line.110"></a>
+<span class="sourceLineNo">111</span>  }<a name="line.111"></a>
+<span class="sourceLineNo">112</span><a name="line.112"></a>
+<span class="sourceLineNo">113</span>  /**<a name="line.113"></a>
+<span class="sourceLineNo">114</span>   * An efficient array based implementation similar to ClusterState for keeping<a name="line.114"></a>
+<span class="sourceLineNo">115</span>   * the status of the cluster in terms of region assignment and distribution.<a name="line.115"></a>
+<span class="sourceLineNo">116</span>   * LoadBalancers, such as StochasticLoadBalancer uses this Cluster object because of<a name="line.116"></a>
+<span class="sourceLineNo">117</span>   * hundreds of thousands of hashmap manipulations are very costly, which is why this<a name="line.117"></a>
+<span class="sourceLineNo">118</span>   * class uses mostly indexes and arrays.<a name="line.118"></a>
+<span class="sourceLineNo">119</span>   *<a name="line.119"></a>
+<span class="sourceLineNo">120</span>   * Cluster tracks a list of unassigned regions, region assignments, and the server<a name="line.120"></a>
+<span class="sourceLineNo">121</span>   * topology in terms of server names, hostnames and racks.<a name="line.121"></a>
+<span class="sourceLineNo">122</span>   */<a name="line.122"></a>
+<span class="sourceLineNo">123</span>  protected static class Cluster {<a name="line.123"></a>
+<span class="sourceLineNo">124</span>    ServerName[] servers;<a name="line.124"></a>
+<span class="sourceLineNo">125</span>    String[] hosts; // ServerName uniquely identifies a region server. multiple RS can run on the same host<a name="line.125"></a>
+<span class="sourceLineNo">126</span>    String[] racks;<a name="line.126"></a>
+<span class="sourceLineNo">127</span>    boolean multiServersPerHost = false; // whether or not any host has more than one server<a name="line.127"></a>
+<span class="sourceLineNo">128</span><a name="line.128"></a>
+<span class="sourceLineNo">129</span>    ArrayList&lt;String&gt; tables;<a name="line.129"></a>
+<span class="sourceLineNo">130</span>    HRegionInfo[] regions;<a name="line.130"></a>
+<span class="sourceLineNo">131</span>    Deque&lt;BalancerRegionLoad&gt;[] regionLoads;<a name="line.131"></a>
+<span class="sourceLineNo">132</span>    private RegionLocationFinder regionFinder;<a name="line.132"></a>
+<span class="sourceLineNo">133</span><a name="line.133"></a>
+<span class="sourceLineNo">134</span>    int[][] regionLocations; //regionIndex -&gt; list of serverIndex sorted by locality<a name="line.134"></a>
+<span class="sourceLineNo">135</span><a name="line.135"></a>
+<span class="sourceLineNo">136</span>    int[]   serverIndexToHostIndex;      //serverIndex -&gt; host index<a name="line.136"></a>
+<span class="sourceLineNo">137</span>    int[]   serverIndexToRackIndex;      //serverIndex -&gt; rack index<a name="line.137"></a>
+<span class="sourceLineNo">138</span><a name="line.138"></a>
+<span class="sourceLineNo">139</span>    int[][] regionsPerServer;            //serverIndex -&gt; region list<a name="line.139"></a>
+<span class="sourceLineNo">140</span>    int[][] regionsPerHost;              //hostIndex -&gt; list of regions<a name="line.140"></a>
+<span class="sourceLineNo">141</span>    int[][] regionsPerRack;              //rackIndex -&gt; region list<a name="line.141"></a>
+<span class="sourceLineNo">142</span>    int[][] primariesOfRegionsPerServer; //serverIndex -&gt; sorted list of regions by primary region index<a name="line.142"></a>
+<span class="sourceLineNo">143</span>    int[][] primariesOfRegionsPerHost;   //hostIndex -&gt; sorted list of regions by primary region index<a name="line.143"></a>
+<span class="sourceLineNo">144</span>    int[][] primariesOfRegionsPerRack;   //rackIndex -&gt; sorted list of regions by primary region index<a name="line.144"></a>
+<span class="sourceLineNo">145</span><a name="line.145"></a>
+<span class="sourceLineNo">146</span>    int[][] serversPerHost;              //hostIndex -&gt; list of server indexes<a name="line.146"></a>
+<span class="sourceLineNo">147</span>    int[][] serversPerRack;              //rackIndex -&gt; list of server indexes<a name="line.147"></a>
+<span class="sourceLineNo">148</span>    int[]   regionIndexToServerIndex;    //regionIndex -&gt; serverIndex<a name="line.148"></a>
+<span class="sourceLineNo">149</span>    int[]   initialRegionIndexToServerIndex;    //regionIndex -&gt; serverIndex (initial cluster state)<a name="line.149"></a>
+<span class="sourceLineNo">150</span>    int[]   regionIndexToTableIndex;     //regionIndex -&gt; tableIndex<a name="line.150"></a>
+<span class="sourceLineNo">151</span>    int[][] numRegionsPerServerPerTable; //serverIndex -&gt; tableIndex -&gt; # regions<a name="line.151"></a>
+<span class="sourceLineNo">152</span>    int[]   numMaxRegionsPerTable;       //tableIndex -&gt; max number of regions in a single RS<a name="line.152"></a>
+<span class="sourceLineNo">153</span>    int[]   regionIndexToPrimaryIndex;   //regionIndex -&gt; regionIndex of the primary<a name="line.153"></a>
+<span class="sourceLineNo">154</span>    boolean hasRegionReplicas = false;   //whether there is regions with replicas<a name="line.154"></a>
+<span class="sourceLineNo">155</span><a name="line.155"></a>
+<span class="sourceLineNo">156</span>    Integer[] serverIndicesSortedByRegionCount;<a name="line.156"></a>
+<span class="sourceLineNo">157</span>    Integer[] serverIndicesSortedByLocality;<a name="line.157"></a>
+<span class="sourceLineNo">158</span><a name="line.158"></a>
+<span class="sourceLineNo">159</span>    Map&lt;String, Integer&gt; serversToIndex;<a name="line.159"></a>
+<span class="sourceLineNo">160</span>    Map&lt;String, Integer&gt; hostsToIndex;<a name="line.160"></a>
+<span class="sourceLineNo">161</span>    Map&lt;String, Integer&gt; racksToIndex;<a name="line.161"></a>
+<span class="sourceLineNo">162</span>    Map&lt;String, Integer&gt; tablesToIndex;<a name="line.162"></a>
+<span class="sourceLineNo">163</span>    Map&lt;HRegionInfo, Integer&gt; regionsToIndex;<a name="line.163"></a>
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+<span class="sourceLineNo">165</span><a name="line.165"></a>
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+<span class="sourceLineNo">167</span>    int numHosts;<a name="line.167"></a>
+<span class="sourceLineNo">168</span>    int numRacks;<a name="line.168"></a>
+<span class="sourceLineNo">169</span>    int numTables;<a name="line.169"></a>
+<span class="sourceLineNo">170</span>    int numRegions;<a name="line.170"></a>
+<span class="sourceLineNo">171</span><a name="line.171"></a>
+<span class="sourceLineNo">172</span>    int numMovedRegions = 0; //num moved regions from the initial configuration<a name="line.172"></a>
+<span class="sourceLineNo">173</span>    Map&lt;ServerName, List&lt;HRegionInfo&gt;&gt; clusterState;<a name="line.173"></a>
+<span class="sourceLineNo">174</span><a name="line.174"></a>
+<span class="sourceLineNo">175</span>    protected final RackManager rackManager;<a name="line.175"></a>
+<span class="sourceLineNo">176</span>    // Maps region -&gt; rackIndex -&gt; locality of region on rack<a name="line.176"></a>
+<span class="sourceLineNo">177</span>    private float[][] rackLocalities;<a name="line.177"></a>
+<span class="sourceLineNo">178</span>    // Maps localityType -&gt; region -&gt; [server|rack]Index with highest locality<a name="line.178"></a>
+<span class="sourceLineNo">179</span>    private int[][] regionsToMostLocalEntities;<a name="line.179"></a>
+<span class="sourceLineNo">180</span><a name="line.180"></a>
+<span class="sourceLineNo">181</span>    protected Cluster(<a name="line.181"></a>
+<span class="sourceLineNo">182</span>        Map&lt;ServerName, List&lt;HRegionInfo&gt;&gt; clusterState,<a name="line.182"></a>
+<span class="sourceLineNo">183</span>        Map&lt;String, Deque&lt;BalancerRegionLoad&gt;&gt; loads,<a name="line.183"></a>
+<span class="sourceLineNo">184</span>        RegionLocationFinder regionFinder,<a name="line.184"></a>
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+<span class="sourceLineNo">188</span><a name="line.188"></a>
+<span class="sourceLineNo">189</span>    @SuppressWarnings("unchecked")<a name="line.189"></a>
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+<span class="sourceLineNo">191</span>        Collection&lt;HRegionInfo&gt; unassignedRegions,<a name="line.191"></a>
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+<span class="sourceLineNo">193</span>        Map&lt;String, Deque&lt;BalancerRegionLoad&gt;&gt; loads,<a name="line.193"></a>
+<span class="sourceLineNo">194</span>        RegionLocationFinder regionFinder,<a name="line.194"></a>
+<span class="sourceLineNo">195</span>        RackManager rackManager) {<a name="line.195"></a>
+<span class="sourceLineNo">196</span><a name="line.196"></a>
+<span class="sourceLineNo">197</span>      if (unassignedRegions == null) {<a name="line.197"></a>
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+<span class="sourceLineNo">199</span>      }<a name="line.199"></a>
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+<span class="sourceLineNo">204</span>      tablesToIndex = new HashMap&lt;&gt;();<a name="line.204"></a>
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+<span class="sourceLineNo">226</span>          continue;<a name="line.226"></a>
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+<span 

<TRUNCATED>

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