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<div class="subTitle">org.apache.hadoop.hbase.master.balancer</div>
<h2 title="Class StochasticLoadBalancer.LocalityBasedCostFunction" class="title">Class StochasticLoadBalancer.LocalityBasedCostFunction</h2>
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<li><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.CostFunction.html" title="class in org.apache.hadoop.hbase.master.balancer">org.apache.hadoop.hbase.master.balancer.StochasticLoadBalancer.CostFunction</a></li>
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<li>org.apache.hadoop.hbase.master.balancer.StochasticLoadBalancer.LocalityBasedCostFunction</li>
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<dt>Direct Known Subclasses:</dt>
<dd><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.RackLocalityCostFunction.html" title="class in org.apache.hadoop.hbase.master.balancer">StochasticLoadBalancer.RackLocalityCostFunction</a>, <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.ServerLocalityCostFunction.html" title="class in org.apache.hadoop.hbase.master.balancer">StochasticLoadBalancer.ServerLocalityCostFunction</a></dd>
</dl>
<dl>
<dt>Enclosing class:</dt>
<dd><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html" title="class in org.apache.hadoop.hbase.master.balancer">StochasticLoadBalancer</a></dd>
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<pre>abstract static class <a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#line.1292">StochasticLoadBalancer.LocalityBasedCostFunction</a>
extends <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.CostFunction.html" title="class in org.apache.hadoop.hbase.master.balancer">StochasticLoadBalancer.CostFunction</a></pre>
<div class="block">Compute a cost of a potential cluster configuration based upon where
<a href="../../../../../../org/apache/hadoop/hbase/regionserver/HStoreFile.html" title="class in org.apache.hadoop.hbase.regionserver"><code>HStoreFile</code></a>s are located.</div>
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<caption><span>Fields</span><span class="tabEnd">&nbsp;</span></caption>
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<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Field and Description</th>
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<td class="colFirst"><code>private double</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.LocalityBasedCostFunction.html#bestLocality">bestLocality</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>private double</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.LocalityBasedCostFunction.html#locality">locality</a></span></code>&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>private <a href="../../../../../../org/apache/hadoop/hbase/master/MasterServices.html" title="interface in org.apache.hadoop.hbase.master">MasterServices</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.LocalityBasedCostFunction.html#services">services</a></span></code>&nbsp;</td>
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<td class="colFirst"><code>private <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.Cluster.LocalityType.html" title="enum in org.apache.hadoop.hbase.master.balancer">BaseLoadBalancer.Cluster.LocalityType</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.LocalityBasedCostFunction.html#type">type</a></span></code>&nbsp;</td>
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<code><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.CostFunction.html#cluster">cluster</a></code></li>
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.LocalityBasedCostFunction.html#LocalityBasedCostFunction-org.apache.hadoop.conf.Configuration-org.apache.hadoop.hbase.master.MasterServices-org.apache.hadoop.hbase.master.balancer.BaseLoadBalancer.Cluster.LocalityType-java.lang.String-float-">LocalityBasedCostFunction</a></span>(org.apache.hadoop.conf.Configuration&nbsp;conf,
<a href="../../../../../../org/apache/hadoop/hbase/master/MasterServices.html" title="interface in org.apache.hadoop.hbase.master">MasterServices</a>&nbsp;srv,
<a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.Cluster.LocalityType.html" title="enum in org.apache.hadoop.hbase.master.balancer">BaseLoadBalancer.Cluster.LocalityType</a>&nbsp;type,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;localityCostKey,
float&nbsp;defaultLocalityCost)</code>&nbsp;</td>
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<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Method and Description</th>
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<td class="colFirst"><code>protected double</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.LocalityBasedCostFunction.html#cost--">cost</a></span>()</code>&nbsp;</td>
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<td class="colFirst"><code>private int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.LocalityBasedCostFunction.html#getMostLocalEntityForRegion-int-">getMostLocalEntityForRegion</a></span>(int&nbsp;region)</code>&nbsp;</td>
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<tr id="i2" class="altColor">
<td class="colFirst"><code>private double</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.LocalityBasedCostFunction.html#getWeightedLocality-int-int-">getWeightedLocality</a></span>(int&nbsp;region,
int&nbsp;entity)</code>&nbsp;</td>
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<tr id="i3" class="rowColor">
<td class="colFirst"><code>(package private) void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.LocalityBasedCostFunction.html#init-org.apache.hadoop.hbase.master.balancer.BaseLoadBalancer.Cluster-">init</a></span>(<a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.Cluster.html" title="class in org.apache.hadoop.hbase.master.balancer">BaseLoadBalancer.Cluster</a>&nbsp;cluster)</code>
<div class="block">Called once per LB invocation to give the cost function
to initialize it's state, and perform any costly calculation.</div>
</td>
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<td class="colFirst"><code>(package private) abstract int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.LocalityBasedCostFunction.html#regionIndexToEntityIndex-int-">regionIndexToEntityIndex</a></span>(int&nbsp;region)</code>
<div class="block">Maps region to the current entity (server or rack) on which it is stored</div>
</td>
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<tr id="i5" class="rowColor">
<td class="colFirst"><code>protected void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.LocalityBasedCostFunction.html#regionMoved-int-int-int-">regionMoved</a></span>(int&nbsp;region,
int&nbsp;oldServer,
int&nbsp;newServer)</code>&nbsp;</td>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.LocalityBasedCostFunction.html#setServices-org.apache.hadoop.hbase.master.MasterServices-">setServices</a></span>(<a href="../../../../../../org/apache/hadoop/hbase/master/MasterServices.html" title="interface in org.apache.hadoop.hbase.master">MasterServices</a>&nbsp;srvc)</code>&nbsp;</td>
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<h3>Methods inherited from class&nbsp;org.apache.hadoop.hbase.master.balancer.<a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.CostFunction.html" title="class in org.apache.hadoop.hbase.master.balancer">StochasticLoadBalancer.CostFunction</a></h3>
<code><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.CostFunction.html#costFromArray-double:A-">costFromArray</a>, <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.CostFunction.html#getMultiplier--">getMultiplier</a>, <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.CostFunction.html#isNeeded--">isNeeded</a>, <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.CostFunction.html#postAction-org.apache.hadoop.hbase.master.balancer.BaseLoadBalancer.Cluster.Action-">postAction</a>, <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.CostFunction.html#scale-double-double-double-">scale</a>, <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.CostFunction.html#setMultiplier-float-">setMultiplier</a></code></li>
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<h4>type</h4>
<pre>private final&nbsp;<a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.Cluster.LocalityType.html" title="enum in org.apache.hadoop.hbase.master.balancer">BaseLoadBalancer.Cluster.LocalityType</a> <a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.LocalityBasedCostFunction.html#line.1294">type</a></pre>
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<h4>bestLocality</h4>
<pre>private&nbsp;double <a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.LocalityBasedCostFunction.html#line.1296">bestLocality</a></pre>
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<h4>locality</h4>
<pre>private&nbsp;double <a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.LocalityBasedCostFunction.html#line.1297">locality</a></pre>
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<h4>LocalityBasedCostFunction</h4>
<pre><a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.LocalityBasedCostFunction.html#line.1301">LocalityBasedCostFunction</a>(org.apache.hadoop.conf.Configuration&nbsp;conf,
<a href="../../../../../../org/apache/hadoop/hbase/master/MasterServices.html" title="interface in org.apache.hadoop.hbase.master">MasterServices</a>&nbsp;srv,
<a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.Cluster.LocalityType.html" title="enum in org.apache.hadoop.hbase.master.balancer">BaseLoadBalancer.Cluster.LocalityType</a>&nbsp;type,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;localityCostKey,
float&nbsp;defaultLocalityCost)</pre>
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<pre>abstract&nbsp;int&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.LocalityBasedCostFunction.html#line.1317">regionIndexToEntityIndex</a>(int&nbsp;region)</pre>
<div class="block">Maps region to the current entity (server or rack) on which it is stored</div>
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<pre>public&nbsp;void&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.LocalityBasedCostFunction.html#line.1319">setServices</a>(<a href="../../../../../../org/apache/hadoop/hbase/master/MasterServices.html" title="interface in org.apache.hadoop.hbase.master">MasterServices</a>&nbsp;srvc)</pre>
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<h4>init</h4>
<pre>void&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.LocalityBasedCostFunction.html#line.1324">init</a>(<a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.Cluster.html" title="class in org.apache.hadoop.hbase.master.balancer">BaseLoadBalancer.Cluster</a>&nbsp;cluster)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.CostFunction.html#init-org.apache.hadoop.hbase.master.balancer.BaseLoadBalancer.Cluster-">StochasticLoadBalancer.CostFunction</a></code></span></div>
<div class="block">Called once per LB invocation to give the cost function
to initialize it's state, and perform any costly calculation.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.CostFunction.html#init-org.apache.hadoop.hbase.master.balancer.BaseLoadBalancer.Cluster-">init</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.CostFunction.html" title="class in org.apache.hadoop.hbase.master.balancer">StochasticLoadBalancer.CostFunction</a></code></dd>
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<pre>protected&nbsp;void&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.LocalityBasedCostFunction.html#line.1346">regionMoved</a>(int&nbsp;region,
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<pre>protected&nbsp;double&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.LocalityBasedCostFunction.html#line.1358">cost</a>()</pre>
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<pre>private&nbsp;int&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.LocalityBasedCostFunction.html#line.1362">getMostLocalEntityForRegion</a>(int&nbsp;region)</pre>
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<pre>private&nbsp;double&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.LocalityBasedCostFunction.html#line.1366">getWeightedLocality</a>(int&nbsp;region,
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