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<div class="subTitle">org.apache.hadoop.hbase.master.balancer</div>
<h2 title="Class StochasticLoadBalancer" class="title">Class StochasticLoadBalancer</h2>
</div>
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<ul class="inheritance">
<li><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">java.lang.Object</a></li>
<li>
<ul class="inheritance">
<li><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html" title="class in org.apache.hadoop.hbase.master.balancer">org.apache.hadoop.hbase.master.balancer.BaseLoadBalancer</a></li>
<li>
<ul class="inheritance">
<li>org.apache.hadoop.hbase.master.balancer.StochasticLoadBalancer</li>
</ul>
</li>
</ul>
</li>
</ul>
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<ul class="blockList">
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<dl>
<dt>All Implemented Interfaces:</dt>
<dd><a href="../../../../../../org/apache/hadoop/hbase/conf/ConfigurationObserver.html" title="interface in org.apache.hadoop.hbase.conf">ConfigurationObserver</a>, <a href="../../../../../../org/apache/hadoop/hbase/master/LoadBalancer.html" title="interface in org.apache.hadoop.hbase.master">LoadBalancer</a>, <a href="../../../../../../org/apache/hadoop/hbase/Stoppable.html" title="interface in org.apache.hadoop.hbase">Stoppable</a></dd>
</dl>
<dl>
<dt>Direct Known Subclasses:</dt>
<dd><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/FavoredStochasticBalancer.html" title="class in org.apache.hadoop.hbase.master.balancer">FavoredStochasticBalancer</a></dd>
</dl>
<hr>
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<pre>@InterfaceAudience.LimitedPrivate(value="Configuration")
public class <a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#line.100">StochasticLoadBalancer</a>
extends <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html" title="class in org.apache.hadoop.hbase.master.balancer">BaseLoadBalancer</a></pre>
<div class="block"><p>This is a best effort load balancer. Given a Cost function F(C) =&gt; x It will
randomly try and mutate the cluster to Cprime. If F(Cprime) &lt; F(C) then the
new cluster state becomes the plan. It includes costs functions to compute the cost of:</p>
<ul>
<li>Region Load</li>
<li>Table Load</li>
<li>Data Locality</li>
<li>Memstore Sizes</li>
<li>Storefile Sizes</li>
</ul>
<p>Every cost function returns a number between 0 and 1 inclusive; where 0 is the lowest cost
best solution, and 1 is the highest possible cost and the worst solution. The computed costs are
scaled by their respective multipliers:</p>
<ul>
<li>hbase.master.balancer.stochastic.regionLoadCost</li>
<li>hbase.master.balancer.stochastic.moveCost</li>
<li>hbase.master.balancer.stochastic.tableLoadCost</li>
<li>hbase.master.balancer.stochastic.localityCost</li>
<li>hbase.master.balancer.stochastic.memstoreSizeCost</li>
<li>hbase.master.balancer.stochastic.storefileSizeCost</li>
</ul>
<p>You can also add custom Cost function by setting the the following configuration value:</p>
<ul>
<li>hbase.master.balancer.stochastic.additionalCostFunctions</li>
</ul>
<p>All custom Cost Functions needs to extends <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/CostFunction.html" title="class in org.apache.hadoop.hbase.master.balancer"><code>CostFunction</code></a></p>
<p>In addition to the above configurations, the balancer can be tuned by the following
configuration values:</p>
<ul>
<li>hbase.master.balancer.stochastic.maxMoveRegions which
controls what the max number of regions that can be moved in a single invocation of this
balancer.</li>
<li>hbase.master.balancer.stochastic.stepsPerRegion is the coefficient by which the number of
regions is multiplied to try and get the number of times the balancer will
mutate all servers.</li>
<li>hbase.master.balancer.stochastic.maxSteps which controls the maximum number of times that
the balancer will try and mutate all the servers. The balancer will use the minimum of this
value and the above computation.</li>
</ul>
<p>This balancer is best used with hbase.master.loadbalance.bytable set to false
so that the balancer gets the full picture of all loads on the cluster.</p></div>
</li>
</ul>
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<h3>Field Summary</h3>
<table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Field Summary table, listing fields, and an explanation">
<caption><span>Fields</span><span class="tabEnd">&nbsp;</span></caption>
<tr>
<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Field and Description</th>
</tr>
<tr class="altColor">
<td class="colFirst"><code>private <a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../../../../org/apache/hadoop/hbase/master/balancer/CandidateGenerator.html" title="class in org.apache.hadoop.hbase.master.balancer">CandidateGenerator</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#candidateGenerators">candidateGenerators</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>protected static <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></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#COST_FUNCTIONS_COST_FUNCTIONS_KEY">COST_FUNCTIONS_COST_FUNCTIONS_KEY</a></span></code>&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>private <a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../../../../org/apache/hadoop/hbase/master/balancer/CostFunction.html" title="class in org.apache.hadoop.hbase.master.balancer">CostFunction</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#costFunctions">costFunctions</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.html#curFunctionCosts">curFunctionCosts</a></span></code>&nbsp;</td>
</tr>
<tr 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.html#curOverallCost">curOverallCost</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>protected static <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></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#KEEP_REGION_LOADS">KEEP_REGION_LOADS</a></span></code>&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>(package private) <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a>&lt;<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>,<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Deque.html?is-external=true" title="class or interface in java.util">Deque</a>&lt;<a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BalancerRegionLoad.html" title="class in org.apache.hadoop.hbase.master.balancer">BalancerRegionLoad</a>&gt;&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#loads">loads</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>private <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/LocalityBasedCandidateGenerator.html" title="class in org.apache.hadoop.hbase.master.balancer">LocalityBasedCandidateGenerator</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#localityCandidateGenerator">localityCandidateGenerator</a></span></code>&nbsp;</td>
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<tr class="altColor">
<td class="colFirst"><code>private <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/ServerLocalityCostFunction.html" title="class in org.apache.hadoop.hbase.master.balancer">ServerLocalityCostFunction</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#localityCost">localityCost</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>private static org.slf4j.Logger</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#LOG">LOG</a></span></code>&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>protected static <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></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#MAX_RUNNING_TIME_KEY">MAX_RUNNING_TIME_KEY</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>protected static <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></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#MAX_STEPS_KEY">MAX_STEPS_KEY</a></span></code>&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>private long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#maxRunningTime">maxRunningTime</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>private int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#maxSteps">maxSteps</a></span></code>&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>protected static <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></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#MIN_COST_NEED_BALANCE_KEY">MIN_COST_NEED_BALANCE_KEY</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>private float</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#minCostNeedBalance">minCostNeedBalance</a></span></code>&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>private int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#numRegionLoadsToRemember">numRegionLoadsToRemember</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>private <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/RackLocalityCostFunction.html" title="class in org.apache.hadoop.hbase.master.balancer">RackLocalityCostFunction</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#rackLocalityCost">rackLocalityCost</a></span></code>&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>private <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/RegionReplicaHostCostFunction.html" title="class in org.apache.hadoop.hbase.master.balancer">RegionReplicaHostCostFunction</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#regionReplicaHostCostFunction">regionReplicaHostCostFunction</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>private <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/RegionReplicaRackCostFunction.html" title="class in org.apache.hadoop.hbase.master.balancer">RegionReplicaRackCostFunction</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#regionReplicaRackCostFunction">regionReplicaRackCostFunction</a></span></code>&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>protected static <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></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#RUN_MAX_STEPS_KEY">RUN_MAX_STEPS_KEY</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>private boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#runMaxSteps">runMaxSteps</a></span></code>&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>protected static <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></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#STEPS_PER_REGION_KEY">STEPS_PER_REGION_KEY</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>private int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#stepsPerRegion">stepsPerRegion</a></span></code>&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>private float</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#sumMultiplier">sumMultiplier</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>private static <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></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#TABLE_FUNCTION_SEP">TABLE_FUNCTION_SEP</a></span></code>&nbsp;</td>
</tr>
<tr 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.html#tempFunctionCosts">tempFunctionCosts</a></span></code>&nbsp;</td>
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<h3>Fields inherited from class&nbsp;org.apache.hadoop.hbase.master.balancer.<a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html" title="class in org.apache.hadoop.hbase.master.balancer">BaseLoadBalancer</a></h3>
<code><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#BALANCER_DECISION_BUFFER_ENABLED">BALANCER_DECISION_BUFFER_ENABLED</a>, <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#BALANCER_REJECTION_BUFFER_ENABLED">BALANCER_REJECTION_BUFFER_ENABLED</a>, <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#clusterStatus">clusterStatus</a>, <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#DEFAULT_BALANCER_DECISION_BUFFER_ENABLED">DEFAULT_BALANCER_DECISION_BUFFER_ENABLED</a>, <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#DEFAULT_BALANCER_REJECTION_BUFFER_ENABLED">DEFAULT_BALANCER_REJECTION_BUFFER_ENABLED</a>, <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#isByTable">isByTable</a>, <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#masterServerName">masterServerName</a>, <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#metricsBalancer">metricsBalancer</a>, <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#MIN_SERVER_BALANCE">MIN_SERVER_BALANCE</a>, <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#provider">provider</a>, <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#rackManager">rackManager</a>, <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#regionFinder">regionFinder</a>, <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#slop">slop</a>, <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#useRegionFinder">useRegionFinder</a></code></li>
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</a>
<h3>Fields inherited from interface&nbsp;org.apache.hadoop.hbase.master.<a href="../../../../../../org/apache/hadoop/hbase/master/LoadBalancer.html" title="interface in org.apache.hadoop.hbase.master">LoadBalancer</a></h3>
<code><a href="../../../../../../org/apache/hadoop/hbase/master/LoadBalancer.html#BOGUS_SERVER_NAME">BOGUS_SERVER_NAME</a>, <a href="../../../../../../org/apache/hadoop/hbase/master/LoadBalancer.html#HBASE_RSGROUP_LOADBALANCER_CLASS">HBASE_RSGROUP_LOADBALANCER_CLASS</a></code></li>
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<h3>Constructor Summary</h3>
<table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Constructor Summary table, listing constructors, and an explanation">
<caption><span>Constructors</span><span class="tabEnd">&nbsp;</span></caption>
<tr>
<th class="colOne" scope="col">Constructor and Description</th>
</tr>
<tr class="altColor">
<td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#StochasticLoadBalancer--">StochasticLoadBalancer</a></span>()</code>
<div class="block">The constructor that pass a MetricsStochasticBalancer to BaseLoadBalancer to replace its
default MetricsBalancer</div>
</td>
</tr>
</table>
</li>
</ul>
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</a>
<h3>Method Summary</h3>
<table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation">
<caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd">&nbsp;</span></span><span id="t1" class="tableTab"><span><a href="javascript:show(1);">Static Methods</a></span><span class="tabEnd">&nbsp;</span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd">&nbsp;</span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd">&nbsp;</span></span></caption>
<tr>
<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Method and Description</th>
</tr>
<tr id="i0" class="altColor">
<td class="colFirst"><code>private void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#addCostFunction-org.apache.hadoop.hbase.master.balancer.CostFunction-">addCostFunction</a></span>(<a href="../../../../../../org/apache/hadoop/hbase/master/balancer/CostFunction.html" title="class in org.apache.hadoop.hbase.master.balancer">CostFunction</a>&nbsp;costFunction)</code>&nbsp;</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code>private boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#areSomeRegionReplicasColocated-org.apache.hadoop.hbase.master.balancer.BalancerClusterState-">areSomeRegionReplicasColocated</a></span>(<a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BalancerClusterState.html" title="class in org.apache.hadoop.hbase.master.balancer">BalancerClusterState</a>&nbsp;c)</code>&nbsp;</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code>protected <a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../../../../org/apache/hadoop/hbase/master/RegionPlan.html" title="class in org.apache.hadoop.hbase.master">RegionPlan</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#balanceTable-org.apache.hadoop.hbase.TableName-java.util.Map-">balanceTable</a></span>(<a href="../../../../../../org/apache/hadoop/hbase/TableName.html" title="class in org.apache.hadoop.hbase">TableName</a>&nbsp;tableName,
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a>&lt;<a href="../../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>,<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../../../../org/apache/hadoop/hbase/client/RegionInfo.html" title="interface in org.apache.hadoop.hbase.client">RegionInfo</a>&gt;&gt;&nbsp;loadOfOneTable)</code>
<div class="block">Given the cluster state this will try and approach an optimal balance.</div>
</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code>private long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#calculateMaxSteps-org.apache.hadoop.hbase.master.balancer.BalancerClusterState-">calculateMaxSteps</a></span>(<a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BalancerClusterState.html" title="class in org.apache.hadoop.hbase.master.balancer">BalancerClusterState</a>&nbsp;cluster)</code>&nbsp;</td>
</tr>
<tr id="i4" class="altColor">
<td class="colFirst"><code>(package private) static <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></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#composeAttributeName-java.lang.String-java.lang.String-">composeAttributeName</a></span>(<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;tableName,
<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;costFunctionName)</code>
<div class="block">A helper function to compose the attribute name from tablename and costfunction name</div>
</td>
</tr>
<tr id="i5" class="rowColor">
<td class="colFirst"><code>(package private) double</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#computeCost-org.apache.hadoop.hbase.master.balancer.BalancerClusterState-double-">computeCost</a></span>(<a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BalancerClusterState.html" title="class in org.apache.hadoop.hbase.master.balancer">BalancerClusterState</a>&nbsp;cluster,
double&nbsp;previousCost)</code>
<div class="block">This is the main cost function.</div>
</td>
</tr>
<tr id="i6" class="altColor">
<td class="colFirst"><code>protected <a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../../../../org/apache/hadoop/hbase/master/balancer/CandidateGenerator.html" title="class in org.apache.hadoop.hbase.master.balancer">CandidateGenerator</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#createCandidateGenerators--">createCandidateGenerators</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i7" class="rowColor">
<td class="colFirst"><code>private static <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/CostFunction.html" title="class in org.apache.hadoop.hbase.master.balancer">CostFunction</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#createCostFunction-java.lang.Class-org.apache.hadoop.conf.Configuration-">createCostFunction</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a>&lt;? extends <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/CostFunction.html" title="class in org.apache.hadoop.hbase.master.balancer">CostFunction</a>&gt;&nbsp;clazz,
org.apache.hadoop.conf.Configuration&nbsp;conf)</code>&nbsp;</td>
</tr>
<tr id="i8" class="altColor">
<td class="colFirst"><code>private <a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../../../../org/apache/hadoop/hbase/master/RegionPlan.html" title="class in org.apache.hadoop.hbase.master">RegionPlan</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#createRegionPlans-org.apache.hadoop.hbase.master.balancer.BalancerClusterState-">createRegionPlans</a></span>(<a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BalancerClusterState.html" title="class in org.apache.hadoop.hbase.master.balancer">BalancerClusterState</a>&nbsp;cluster)</code>
<div class="block">Create all of the RegionPlan's needed to move from the initial cluster state to the desired
state.</div>
</td>
</tr>
<tr id="i9" class="rowColor">
<td class="colFirst"><code>private <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></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#functionCost--">functionCost</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i10" class="altColor">
<td class="colFirst"><code>private <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></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#getBalanceReason-double-double-">getBalanceReason</a></span>(double&nbsp;total,
double&nbsp;sumMultiplier)</code>&nbsp;</td>
</tr>
<tr id="i11" class="rowColor">
<td class="colFirst"><code>(package private) <a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../../../../org/apache/hadoop/hbase/master/balancer/CandidateGenerator.html" title="class in org.apache.hadoop.hbase.master.balancer">CandidateGenerator</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#getCandidateGenerators--">getCandidateGenerators</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i12" class="altColor">
<td class="colFirst"><code>(package private) <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>[]</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#getCostFunctionNames--">getCostFunctionNames</a></span>()</code>
<div class="block">Get the names of the cost functions</div>
</td>
</tr>
<tr id="i13" class="rowColor">
<td class="colFirst"><code>protected float</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#getDefaultSlop--">getDefaultSlop</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i14" class="altColor">
<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.html#initCosts-org.apache.hadoop.hbase.master.balancer.BalancerClusterState-">initCosts</a></span>(<a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BalancerClusterState.html" title="class in org.apache.hadoop.hbase.master.balancer">BalancerClusterState</a>&nbsp;cluster)</code>&nbsp;</td>
</tr>
<tr id="i15" 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.html#loadConf-org.apache.hadoop.conf.Configuration-">loadConf</a></span>(org.apache.hadoop.conf.Configuration&nbsp;conf)</code>&nbsp;</td>
</tr>
<tr id="i16" class="altColor">
<td class="colFirst"><code>private void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#loadCustomCostFunctions-org.apache.hadoop.conf.Configuration-">loadCustomCostFunctions</a></span>(org.apache.hadoop.conf.Configuration&nbsp;conf)</code>&nbsp;</td>
</tr>
<tr id="i17" class="rowColor">
<td class="colFirst"><code>(package private) boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#needsBalance-org.apache.hadoop.hbase.TableName-org.apache.hadoop.hbase.master.balancer.BalancerClusterState-">needsBalance</a></span>(<a href="../../../../../../org/apache/hadoop/hbase/TableName.html" title="class in org.apache.hadoop.hbase">TableName</a>&nbsp;tableName,
<a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BalancerClusterState.html" title="class in org.apache.hadoop.hbase.master.balancer">BalancerClusterState</a>&nbsp;cluster)</code>&nbsp;</td>
</tr>
<tr id="i18" class="altColor">
<td class="colFirst"><code>(package private) <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BalanceAction.html" title="class in org.apache.hadoop.hbase.master.balancer">BalanceAction</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#nextAction-org.apache.hadoop.hbase.master.balancer.BalancerClusterState-">nextAction</a></span>(<a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BalancerClusterState.html" title="class in org.apache.hadoop.hbase.master.balancer">BalancerClusterState</a>&nbsp;cluster)</code>&nbsp;</td>
</tr>
<tr id="i19" class="rowColor">
<td class="colFirst"><code>private void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#sendRegionPlansToRingBuffer-java.util.List-double-double-java.lang.String-long-">sendRegionPlansToRingBuffer</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../../../../org/apache/hadoop/hbase/master/RegionPlan.html" title="class in org.apache.hadoop.hbase.master">RegionPlan</a>&gt;&nbsp;plans,
double&nbsp;currentCost,
double&nbsp;initCost,
<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;initFunctionTotalCosts,
long&nbsp;step)</code>&nbsp;</td>
</tr>
<tr id="i20" class="altColor">
<td class="colFirst"><code>private void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#sendRejectionReasonToRingBuffer-java.util.function.Supplier-java.util.List-">sendRejectionReasonToRingBuffer</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/function/Supplier.html?is-external=true" title="class or interface in java.util.function">Supplier</a>&lt;<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>&gt;&nbsp;reason,
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../../../../org/apache/hadoop/hbase/master/balancer/CostFunction.html" title="class in org.apache.hadoop.hbase.master.balancer">CostFunction</a>&gt;&nbsp;costFunctions)</code>&nbsp;</td>
</tr>
<tr id="i21" 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.html#setRackManager-org.apache.hadoop.hbase.master.RackManager-">setRackManager</a></span>(<a href="../../../../../../org/apache/hadoop/hbase/master/RackManager.html" title="class in org.apache.hadoop.hbase.master">RackManager</a>&nbsp;rackManager)</code>&nbsp;</td>
</tr>
<tr id="i22" class="altColor">
<td class="colFirst"><code>private <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></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#totalCostsPerFunc--">totalCostsPerFunc</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i23" class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#updateClusterMetrics-org.apache.hadoop.hbase.ClusterMetrics-">updateClusterMetrics</a></span>(<a href="../../../../../../org/apache/hadoop/hbase/ClusterMetrics.html" title="interface in org.apache.hadoop.hbase">ClusterMetrics</a>&nbsp;st)</code>
<div class="block">Set the current cluster status.</div>
</td>
</tr>
<tr id="i24" class="altColor">
<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.html#updateCostsWithAction-org.apache.hadoop.hbase.master.balancer.BalancerClusterState-org.apache.hadoop.hbase.master.balancer.BalanceAction-">updateCostsWithAction</a></span>(<a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BalancerClusterState.html" title="class in org.apache.hadoop.hbase.master.balancer">BalancerClusterState</a>&nbsp;cluster,
<a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BalanceAction.html" title="class in org.apache.hadoop.hbase.master.balancer">BalanceAction</a>&nbsp;action)</code>&nbsp;</td>
</tr>
<tr id="i25" 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.html#updateMetricsSize-int-">updateMetricsSize</a></span>(int&nbsp;size)</code>
<div class="block">Update the number of metrics that are reported to JMX</div>
</td>
</tr>
<tr id="i26" class="altColor">
<td class="colFirst"><code>private void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#updateRegionLoad--">updateRegionLoad</a></span>()</code>
<div class="block">Store the current region loads.</div>
</td>
</tr>
<tr id="i27" class="rowColor">
<td class="colFirst"><code>private void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#updateStochasticCosts-org.apache.hadoop.hbase.TableName-double-double:A-">updateStochasticCosts</a></span>(<a href="../../../../../../org/apache/hadoop/hbase/TableName.html" title="class in org.apache.hadoop.hbase">TableName</a>&nbsp;tableName,
double&nbsp;overall,
double[]&nbsp;subCosts)</code>
<div class="block">update costs to JMX</div>
</td>
</tr>
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<h3>Methods inherited from class&nbsp;org.apache.hadoop.hbase.master.balancer.<a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html" title="class in org.apache.hadoop.hbase.master.balancer">BaseLoadBalancer</a></h3>
<code><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#balanceCluster-java.util.Map-">balanceCluster</a>, <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#getConf--">getConf</a>, <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#idleRegionServerExist-org.apache.hadoop.hbase.master.balancer.BalancerClusterState-">idleRegionServerExist</a>, <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#initialize--">initialize</a>, <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#isStopped--">isStopped</a>, <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#normalizeSlop-float-">normalizeSlop</a>, <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#onConfigurationChange-org.apache.hadoop.conf.Configuration-">onConfigurationChange</a>, <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#postMasterStartupInitialize--">postMasterStartupInitialize</a>, <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#preBalanceCluster-java.util.Map-">preBalanceCluster</a>, <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#randomAssignment-org.apache.hadoop.hbase.client.RegionInfo-java.util.List-">randomAssignment</a>, <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#regionOffline-org.apache.hadoop.hbase.client.RegionInfo-">regionOffline</a>, <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#regionOnline-org.apache.hadoop.hbase.client.RegionInfo-org.apache.hadoop.hbase.ServerName-">regionOnline</a>, <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#retainAssignment-java.util.Map-java.util.List-">retainAssignment</a>, <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#roundRobinAssignment-java.util.List-java.util.List-">roundRobinAssignment</a>, <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#setClusterInfoProvider-org.apache.hadoop.hbase.master.balancer.ClusterInfoProvider-">setClusterInfoProvider</a>, <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#stop-java.lang.String-">stop</a>, <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#updateBalancerStatus-boolean-">updateBalancerStatus</a></code></li>
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<h3>Methods inherited from class&nbsp;java.lang.<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></h3>
<code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#clone--" title="class or interface in java.lang">clone</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#equals-java.lang.Object-" title="class or interface in java.lang">equals</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#finalize--" title="class or interface in java.lang">finalize</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#getClass--" title="class or interface in java.lang">getClass</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#hashCode--" title="class or interface in java.lang">hashCode</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notify--" title="class or interface in java.lang">notify</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notifyAll--" title="class or interface in java.lang">notifyAll</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#toString--" title="class or interface in java.lang">toString</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait--" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-int-" title="class or interface in java.lang">wait</a></code></li>
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<h3>Field Detail</h3>
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<h4>LOG</h4>
<pre>private static final&nbsp;org.slf4j.Logger <a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#line.102">LOG</a></pre>
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<pre>protected static final&nbsp;<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> <a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#line.104">STEPS_PER_REGION_KEY</a></pre>
<dl>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../../../../../constant-values.html#org.apache.hadoop.hbase.master.balancer.StochasticLoadBalancer.STEPS_PER_REGION_KEY">Constant Field Values</a></dd>
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<pre>protected&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../../../../org/apache/hadoop/hbase/master/RegionPlan.html" title="class in org.apache.hadoop.hbase.master">RegionPlan</a>&gt;&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#line.382">balanceTable</a>(<a href="../../../../../../org/apache/hadoop/hbase/TableName.html" title="class in org.apache.hadoop.hbase">TableName</a>&nbsp;tableName,
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a>&lt;<a href="../../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>,<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../../../../org/apache/hadoop/hbase/client/RegionInfo.html" title="interface in org.apache.hadoop.hbase.client">RegionInfo</a>&gt;&gt;&nbsp;loadOfOneTable)</pre>
<div class="block">Given the cluster state this will try and approach an optimal balance. This
should always approach the optimal state given enough steps.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#balanceTable-org.apache.hadoop.hbase.TableName-java.util.Map-">balanceTable</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html" title="class in org.apache.hadoop.hbase.master.balancer">BaseLoadBalancer</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>tableName</code> - the table to be balanced</dd>
<dd><code>loadOfOneTable</code> - region load of servers for the specific one table</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>List of plans</dd>
</dl>
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<pre>private&nbsp;void&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#line.491">sendRejectionReasonToRingBuffer</a>(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/function/Supplier.html?is-external=true" title="class or interface in java.util.function">Supplier</a>&lt;<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>&gt;&nbsp;reason,
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../../../../org/apache/hadoop/hbase/master/balancer/CostFunction.html" title="class in org.apache.hadoop.hbase.master.balancer">CostFunction</a>&gt;&nbsp;costFunctions)</pre>
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<pre>private&nbsp;void&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#line.507">sendRegionPlansToRingBuffer</a>(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../../../../org/apache/hadoop/hbase/master/RegionPlan.html" title="class in org.apache.hadoop.hbase.master">RegionPlan</a>&gt;&nbsp;plans,
double&nbsp;currentCost,
double&nbsp;initCost,
<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;initFunctionTotalCosts,
long&nbsp;step)</pre>
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<h4>updateStochasticCosts</h4>
<pre>private&nbsp;void&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#line.526">updateStochasticCosts</a>(<a href="../../../../../../org/apache/hadoop/hbase/TableName.html" title="class in org.apache.hadoop.hbase">TableName</a>&nbsp;tableName,
double&nbsp;overall,
double[]&nbsp;subCosts)</pre>
<div class="block">update costs to JMX</div>
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<pre>private&nbsp;void&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#line.550">addCostFunction</a>(<a href="../../../../../../org/apache/hadoop/hbase/master/balancer/CostFunction.html" title="class in org.apache.hadoop.hbase.master.balancer">CostFunction</a>&nbsp;costFunction)</pre>
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<h4>functionCost</h4>
<pre>private&nbsp;<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;<a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#line.557">functionCost</a>()</pre>
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<pre>private&nbsp;<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;<a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#line.578">totalCostsPerFunc</a>()</pre>
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<h4>createRegionPlans</h4>
<pre>private&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../../../../org/apache/hadoop/hbase/master/RegionPlan.html" title="class in org.apache.hadoop.hbase.master">RegionPlan</a>&gt;&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#line.606">createRegionPlans</a>(<a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BalancerClusterState.html" title="class in org.apache.hadoop.hbase.master.balancer">BalancerClusterState</a>&nbsp;cluster)</pre>
<div class="block">Create all of the RegionPlan's needed to move from the initial cluster state to the desired
state.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>cluster</code> - The state of the cluster</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>List of RegionPlan's that represent the moves needed to get to desired final state.</dd>
</dl>
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<pre>private&nbsp;void&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#line.632">updateRegionLoad</a>()</pre>
<div class="block">Store the current region loads.</div>
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<pre>void&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#line.655">initCosts</a>(<a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BalancerClusterState.html" title="class in org.apache.hadoop.hbase.master.balancer">BalancerClusterState</a>&nbsp;cluster)</pre>
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<pre>void&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#line.663">updateCostsWithAction</a>(<a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BalancerClusterState.html" title="class in org.apache.hadoop.hbase.master.balancer">BalancerClusterState</a>&nbsp;cluster,
<a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BalanceAction.html" title="class in org.apache.hadoop.hbase.master.balancer">BalanceAction</a>&nbsp;action)</pre>
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<pre><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;<a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#line.676">getCostFunctionNames</a>()</pre>
<div class="block">Get the names of the cost functions</div>
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<pre>double&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#line.697">computeCost</a>(<a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BalancerClusterState.html" title="class in org.apache.hadoop.hbase.master.balancer">BalancerClusterState</a>&nbsp;cluster,
double&nbsp;previousCost)</pre>
<div class="block">This is the main cost function. It will compute a cost associated with a proposed cluster
state. All different costs will be combined with their multipliers to produce a double cost.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>cluster</code> - The state of the cluster</dd>
<dd><code>previousCost</code> - the previous cost. This is used as an early out.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>a double of a cost associated with the proposed cluster state. This cost is an
aggregate of all individual cost functions.</dd>
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<pre>static&nbsp;<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;<a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.html#line.725">composeAttributeName</a>(<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;tableName,
<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;costFunctionName)</pre>
<div class="block">A helper function to compose the attribute name from tablename and costfunction name</div>
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