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<div class="subTitle">org.apache.hadoop.hbase.master.balancer</div>
<h2 title="Class BaseLoadBalancer" class="title">Class BaseLoadBalancer</h2>
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<ul class="inheritance">
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<li>org.apache.hadoop.hbase.master.balancer.BaseLoadBalancer</li>
</ul>
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<dt>All Implemented Interfaces:</dt>
<dd>org.apache.hadoop.conf.Configurable, <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/favored/FavoredNodeLoadBalancer.html" title="class in org.apache.hadoop.hbase.favored">FavoredNodeLoadBalancer</a>, <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/SimpleLoadBalancer.html" title="class in org.apache.hadoop.hbase.master.balancer">SimpleLoadBalancer</a>, <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>@InterfaceAudience.Private
public abstract class <a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#line.77">BaseLoadBalancer</a>
extends <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>
implements <a href="../../../../../../org/apache/hadoop/hbase/master/LoadBalancer.html" title="interface in org.apache.hadoop.hbase.master">LoadBalancer</a></pre>
<div class="block">The base class for load balancers. It provides the the functions used to by
<a href="../../../../../../org/apache/hadoop/hbase/master/assignment/AssignmentManager.html" title="class in org.apache.hadoop.hbase.master.assignment"><code>AssignmentManager</code></a> to assign regions
in the edge cases. It doesn't provide an implementation of the
actual balancing algorithm.</div>
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<!-- ======== NESTED CLASS SUMMARY ======== -->
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<caption><span>Nested Classes</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">Class and Description</th>
</tr>
<tr class="altColor">
<td class="colFirst"><code>protected static class&nbsp;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.Cluster.html" title="class in org.apache.hadoop.hbase.master.balancer">BaseLoadBalancer.Cluster</a></span></code>
<div class="block">An efficient array based implementation similar to ClusterState for keeping
the status of the cluster in terms of region assignment and distribution.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>private static class&nbsp;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.DefaultRackManager.html" title="class in org.apache.hadoop.hbase.master.balancer">BaseLoadBalancer.DefaultRackManager</a></span></code>&nbsp;</td>
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<h3>Field Summary</h3>
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<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>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/BaseLoadBalancer.html#BALANCER_DECISION_BUFFER_ENABLED">BALANCER_DECISION_BUFFER_ENABLED</a></span></code>&nbsp;</td>
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<tr class="rowColor">
<td class="colFirst"><code>protected <a href="../../../../../../org/apache/hadoop/hbase/ClusterMetrics.html" title="interface in org.apache.hadoop.hbase">ClusterMetrics</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#clusterStatus">clusterStatus</a></span></code>&nbsp;</td>
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<tr class="altColor">
<td class="colFirst"><code>protected org.apache.hadoop.conf.Configuration</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#config">config</a></span></code>&nbsp;</td>
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<tr class="rowColor">
<td class="colFirst"><code>static boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#DEFAULT_BALANCER_DECISION_BUFFER_ENABLED">DEFAULT_BALANCER_DECISION_BUFFER_ENABLED</a></span></code>&nbsp;</td>
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<tr class="altColor">
<td class="colFirst"><code>private static <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;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#EMPTY_REGION_LIST">EMPTY_REGION_LIST</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>(package private) static <a href="https://docs.oracle.com/javase/8/docs/api/java/util/function/Predicate.html?is-external=true" title="class or interface in java.util.function">Predicate</a>&lt;<a href="../../../../../../org/apache/hadoop/hbase/ServerMetrics.html" title="interface in org.apache.hadoop.hbase">ServerMetrics</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#IDLE_SERVER_PREDICATOR">IDLE_SERVER_PREDICATOR</a></span></code>&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>protected boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#isByTable">isByTable</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/BaseLoadBalancer.html#LOG">LOG</a></span></code>&nbsp;</td>
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<tr class="altColor">
<td class="colFirst"><code>protected boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#maintenanceMode">maintenanceMode</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>protected <a href="../../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#masterServerName">masterServerName</a></span></code>&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>protected <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/MetricsBalancer.html" title="class in org.apache.hadoop.hbase.master.balancer">MetricsBalancer</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#metricsBalancer">metricsBalancer</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>protected static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#MIN_SERVER_BALANCE">MIN_SERVER_BALANCE</a></span></code>&nbsp;</td>
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<tr class="altColor">
<td class="colFirst"><code>protected <a href="../../../../../../org/apache/hadoop/hbase/namequeues/NamedQueueRecorder.html" title="class in org.apache.hadoop.hbase.namequeues">NamedQueueRecorder</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#namedQueueRecorder">namedQueueRecorder</a></span></code>
<div class="block">Use to add balancer decision history to ring-buffer</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>protected boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#onlySystemTablesOnMaster">onlySystemTablesOnMaster</a></span></code>
<div class="block"><span class="deprecatedLabel">Deprecated.</span>&nbsp;
<div class="block"><span class="deprecationComment">since 2.4.0, will be removed in 3.0.0.</span></div>
</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>protected float</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#overallSlop">overallSlop</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>protected <a href="../../../../../../org/apache/hadoop/hbase/master/RackManager.html" title="class in org.apache.hadoop.hbase.master">RackManager</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#rackManager">rackManager</a></span></code>&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>private static <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Random.html?is-external=true" title="class or interface in java.util">Random</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#RANDOM">RANDOM</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>protected <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/RegionHDFSBlockLocationFinder.html" title="class in org.apache.hadoop.hbase.master.balancer">RegionHDFSBlockLocationFinder</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#regionFinder">regionFinder</a></span></code>&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>protected <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/BaseLoadBalancer.html#services">services</a></span></code>&nbsp;</td>
</tr>
<tr 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/BaseLoadBalancer.html#slop">slop</a></span></code>&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>private boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#stopped">stopped</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>protected boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#useRegionFinder">useRegionFinder</a></span></code>&nbsp;</td>
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<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>, <a href="../../../../../../org/apache/hadoop/hbase/master/LoadBalancer.html#SYSTEM_TABLES_ON_MASTER">SYSTEM_TABLES_ON_MASTER</a>, <a href="../../../../../../org/apache/hadoop/hbase/master/LoadBalancer.html#TABLES_ON_MASTER">TABLES_ON_MASTER</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>
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<th class="colLast" scope="col">Constructor and Description</th>
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<td class="colFirst"><code>protected </code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#BaseLoadBalancer--">BaseLoadBalancer</a></span>()</code>
<div class="block">The constructor that uses the basic MetricsBalancer</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>protected </code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#BaseLoadBalancer-org.apache.hadoop.hbase.master.balancer.MetricsBalancer-">BaseLoadBalancer</a></span>(<a href="../../../../../../org/apache/hadoop/hbase/master/balancer/MetricsBalancer.html" title="class in org.apache.hadoop.hbase.master.balancer">MetricsBalancer</a>&nbsp;metricsBalancer)</code>
<div class="block">This Constructor accepts an instance of MetricsBalancer,
which will be used instead of creating a new one</div>
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<h3>Method Summary</h3>
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<caption><span id="t0" class="activeTableTab"><span>All Methods</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="t3" class="tableTab"><span><a href="javascript:show(4);">Abstract 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><span id="t6" class="tableTab"><span><a href="javascript:show(32);">Deprecated Methods</a></span><span class="tabEnd">&nbsp;</span></span></caption>
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<th class="colLast" scope="col">Method and Description</th>
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<tr id="i0" class="altColor">
<td class="colFirst"><code>protected boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#areSomeRegionReplicasColocated-org.apache.hadoop.hbase.master.balancer.BaseLoadBalancer.Cluster-">areSomeRegionReplicasColocated</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;c)</code>
<div class="block">Subclasses should implement this to return true if the cluster has nodes that hosts
multiple replicas for the same region, or, if there are multiple racks and the same
rack hosts replicas of the same region</div>
</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code>protected <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;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#assignMasterSystemRegions-java.util.Collection-java.util.List-">assignMasterSystemRegions</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a>&lt;<a href="../../../../../../org/apache/hadoop/hbase/client/RegionInfo.html" title="interface in org.apache.hadoop.hbase.client">RegionInfo</a>&gt;&nbsp;regions,
<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/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>&gt;&nbsp;servers)</code>
<div class="block"><span class="deprecatedLabel">Deprecated.</span>&nbsp;
<div class="block"><span class="deprecationComment">since 2.4.0, will be removed in 3.0.0.</span></div>
</div>
</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code><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/BaseLoadBalancer.html#balanceCluster-java.util.Map-">balanceCluster</a></span>(<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/TableName.html" title="class in org.apache.hadoop.hbase">TableName</a>,<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;&gt;&nbsp;loadOfAllTable)</code>
<div class="block">Perform the major balance operation for cluster, will invoke <a href="../../../../../../org/apache/hadoop/hbase/master/LoadBalancer.html#balanceTable-org.apache.hadoop.hbase.TableName-java.util.Map-"><code>LoadBalancer.balanceTable(org.apache.hadoop.hbase.TableName, java.util.Map&lt;org.apache.hadoop.hbase.ServerName, java.util.List&lt;org.apache.hadoop.hbase.client.RegionInfo&gt;&gt;)</code></a> to do actual
balance.</div>
</td>
</tr>
<tr id="i3" class="rowColor">
<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/BaseLoadBalancer.html#balanceMasterRegions-java.util.Map-">balanceMasterRegions</a></span>(<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;clusterMap)</code>
<div class="block"><span class="deprecatedLabel">Deprecated.</span>&nbsp;
<div class="block"><span class="deprecationComment">since 2.4.0, will be removed in 3.0.0.</span></div>
</div>
</td>
</tr>
<tr id="i4" class="altColor">
<td class="colFirst"><code>abstract <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/BaseLoadBalancer.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">Perform the major balance operation for table, all class implement of <a href="../../../../../../org/apache/hadoop/hbase/master/LoadBalancer.html" title="interface in org.apache.hadoop.hbase.master"><code>LoadBalancer</code></a>
should override this method</div>
</td>
</tr>
<tr id="i5" class="rowColor">
<td class="colFirst"><code>protected <a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.Cluster.html" title="class in org.apache.hadoop.hbase.master.balancer">BaseLoadBalancer.Cluster</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#createCluster-java.util.List-java.util.Collection-">createCluster</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/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>&gt;&nbsp;servers,
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a>&lt;<a href="../../../../../../org/apache/hadoop/hbase/client/RegionInfo.html" title="interface in org.apache.hadoop.hbase.client">RegionInfo</a>&gt;&nbsp;regions)</code>&nbsp;</td>
</tr>
<tr id="i6" 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/BaseLoadBalancer.html#createRegionFinder--">createRegionFinder</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i7" class="rowColor">
<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/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#findIdleServers-java.util.List-">findIdleServers</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/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>&gt;&nbsp;servers)</code>&nbsp;</td>
</tr>
<tr id="i8" class="altColor">
<td class="colFirst"><code>org.apache.hadoop.conf.Configuration</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#getConf--">getConf</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i9" class="rowColor">
<td class="colFirst"><code>protected <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;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#getRegionAssignmentsByServer-java.util.Collection-">getRegionAssignmentsByServer</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a>&lt;<a href="../../../../../../org/apache/hadoop/hbase/client/RegionInfo.html" title="interface in org.apache.hadoop.hbase.client">RegionInfo</a>&gt;&nbsp;regions)</code>&nbsp;</td>
</tr>
<tr id="i10" class="altColor">
<td class="colFirst"><code>protected boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#idleRegionServerExist-org.apache.hadoop.hbase.master.balancer.BaseLoadBalancer.Cluster-">idleRegionServerExist</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;c)</code>&nbsp;</td>
</tr>
<tr id="i11" class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#initialize--">initialize</a></span>()</code>
<div class="block">Initialize the load balancer.</div>
</td>
</tr>
<tr id="i12" class="altColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#isStopped--">isStopped</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i13" class="rowColor">
<td class="colFirst"><code>protected boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#needsBalance-org.apache.hadoop.hbase.TableName-org.apache.hadoop.hbase.master.balancer.BaseLoadBalancer.Cluster-">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/BaseLoadBalancer.Cluster.html" title="class in org.apache.hadoop.hbase.master.balancer">BaseLoadBalancer.Cluster</a>&nbsp;c)</code>&nbsp;</td>
</tr>
<tr id="i14" class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#onConfigurationChange-org.apache.hadoop.conf.Configuration-">onConfigurationChange</a></span>(org.apache.hadoop.conf.Configuration&nbsp;conf)</code>
<div class="block">Notification that config has changed</div>
</td>
</tr>
<tr id="i15" class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#postMasterStartupInitialize--">postMasterStartupInitialize</a></span>()</code>
<div class="block">If balancer needs to do initialization after Master has started up, lets do that here.</div>
</td>
</tr>
<tr id="i16" class="altColor">
<td class="colFirst"><code>private <a href="../../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#randomAssignment-org.apache.hadoop.hbase.master.balancer.BaseLoadBalancer.Cluster-org.apache.hadoop.hbase.client.RegionInfo-java.util.List-">randomAssignment</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,
<a href="../../../../../../org/apache/hadoop/hbase/client/RegionInfo.html" title="interface in org.apache.hadoop.hbase.client">RegionInfo</a>&nbsp;regionInfo,
<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/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>&gt;&nbsp;servers)</code>
<div class="block">Used to assign a single region to a random server.</div>
</td>
</tr>
<tr id="i17" class="rowColor">
<td class="colFirst"><code><a href="../../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#randomAssignment-org.apache.hadoop.hbase.client.RegionInfo-java.util.List-">randomAssignment</a></span>(<a href="../../../../../../org/apache/hadoop/hbase/client/RegionInfo.html" title="interface in org.apache.hadoop.hbase.client">RegionInfo</a>&nbsp;regionInfo,
<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/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>&gt;&nbsp;servers)</code>
<div class="block">Used to assign a single region to a random server.</div>
</td>
</tr>
<tr id="i18" class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#regionOffline-org.apache.hadoop.hbase.client.RegionInfo-">regionOffline</a></span>(<a href="../../../../../../org/apache/hadoop/hbase/client/RegionInfo.html" title="interface in org.apache.hadoop.hbase.client">RegionInfo</a>&nbsp;regionInfo)</code>
<div class="block">Marks the region as offline at balancer.</div>
</td>
</tr>
<tr id="i19" class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#regionOnline-org.apache.hadoop.hbase.client.RegionInfo-org.apache.hadoop.hbase.ServerName-">regionOnline</a></span>(<a href="../../../../../../org/apache/hadoop/hbase/client/RegionInfo.html" title="interface in org.apache.hadoop.hbase.client">RegionInfo</a>&nbsp;regionInfo,
<a href="../../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>&nbsp;sn)</code>
<div class="block">Marks the region as online at balancer.</div>
</td>
</tr>
<tr id="i20" class="altColor">
<td class="colFirst"><code><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;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#retainAssignment-java.util.Map-java.util.List-">retainAssignment</a></span>(<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/client/RegionInfo.html" title="interface in org.apache.hadoop.hbase.client">RegionInfo</a>,<a href="../../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>&gt;&nbsp;regions,
<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/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>&gt;&nbsp;servers)</code>
<div class="block">Generates a bulk assignment startup plan, attempting to reuse the existing
assignment information from META, but adjusting for the specified list of
available/online servers available for assignment.</div>
</td>
</tr>
<tr id="i21" 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/BaseLoadBalancer.html#roundRobinAssignment-org.apache.hadoop.hbase.master.balancer.BaseLoadBalancer.Cluster-java.util.List-java.util.List-java.util.Map-">roundRobinAssignment</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,
<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;&nbsp;regions,
<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/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>&gt;&nbsp;servers,
<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;assignments)</code>
<div class="block">Round robin a list of regions to a list of servers</div>
</td>
</tr>
<tr id="i22" class="altColor">
<td class="colFirst"><code><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;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#roundRobinAssignment-java.util.List-java.util.List-">roundRobinAssignment</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/client/RegionInfo.html" title="interface in org.apache.hadoop.hbase.client">RegionInfo</a>&gt;&nbsp;regions,
<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/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>&gt;&nbsp;servers)</code>
<div class="block">Generates a bulk assignment plan to be used on cluster startup using a
simple round-robin assignment.</div>
</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/BaseLoadBalancer.html#setClusterMetrics-org.apache.hadoop.hbase.ClusterMetrics-">setClusterMetrics</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>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#setConf-org.apache.hadoop.conf.Configuration-">setConf</a></span>(org.apache.hadoop.conf.Configuration&nbsp;conf)</code>&nbsp;</td>
</tr>
<tr id="i25" class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#setMasterServices-org.apache.hadoop.hbase.master.MasterServices-">setMasterServices</a></span>(<a href="../../../../../../org/apache/hadoop/hbase/master/MasterServices.html" title="interface in org.apache.hadoop.hbase.master">MasterServices</a>&nbsp;masterServices)</code>
<div class="block">Set the master service.</div>
</td>
</tr>
<tr id="i26" class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.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="i27" 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/BaseLoadBalancer.html#setSlop-org.apache.hadoop.conf.Configuration-">setSlop</a></span>(org.apache.hadoop.conf.Configuration&nbsp;conf)</code>&nbsp;</td>
</tr>
<tr id="i28" class="altColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#shouldBeOnMaster-org.apache.hadoop.hbase.client.RegionInfo-">shouldBeOnMaster</a></span>(<a href="../../../../../../org/apache/hadoop/hbase/client/RegionInfo.html" title="interface in org.apache.hadoop.hbase.client">RegionInfo</a>&nbsp;region)</code>
<div class="block"><span class="deprecatedLabel">Deprecated.</span>&nbsp;
<div class="block"><span class="deprecationComment">since 2.4.0, will be removed in 3.0.0.</span></div>
</div>
</td>
</tr>
<tr id="i29" class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#stop-java.lang.String-">stop</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;why)</code>
<div class="block">Stop this service.</div>
</td>
</tr>
<tr id="i30" class="altColor">
<td class="colFirst"><code>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="../../../../../../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;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#toEnsumbleTableLoad-java.util.Map-">toEnsumbleTableLoad</a></span>(<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/TableName.html" title="class in org.apache.hadoop.hbase">TableName</a>,<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;&gt;&nbsp;LoadOfAllTable)</code>&nbsp;</td>
</tr>
<tr id="i31" class="rowColor">
<td class="colFirst"><code>void</code></td>
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<div class="block">Check if a region belongs to some system table.
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<dd><a href="https://issues.apache.org/jira/browse/HBASE-15549">HBASE-15549</a></dd>
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<dd><a href="https://issues.apache.org/jira/browse/HBASE-15549">HBASE-15549</a></dd>
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<div class="block"><span class="deprecatedLabel">Deprecated.</span>&nbsp;<span class="deprecationComment">since 2.4.0, will be removed in 3.0.0.</span></div>
<div class="block">If master is configured to carry system tables only, in here is
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<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="https://issues.apache.org/jira/browse/HBASE-15549">HBASE-15549</a></dd>
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<div class="block">Set the master service.</div>
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<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../org/apache/hadoop/hbase/master/LoadBalancer.html#setMasterServices-org.apache.hadoop.hbase.master.MasterServices-">setMasterServices</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../org/apache/hadoop/hbase/master/LoadBalancer.html" title="interface in org.apache.hadoop.hbase.master">LoadBalancer</a></code></dd>
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<h4>postMasterStartupInitialize</h4>
<pre>public&nbsp;void&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#line.1196">postMasterStartupInitialize</a>()</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../../../org/apache/hadoop/hbase/master/LoadBalancer.html#postMasterStartupInitialize--">LoadBalancer</a></code></span></div>
<div class="block">If balancer needs to do initialization after Master has started up, lets do that here.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../org/apache/hadoop/hbase/master/LoadBalancer.html#postMasterStartupInitialize--">postMasterStartupInitialize</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../org/apache/hadoop/hbase/master/LoadBalancer.html" title="interface in org.apache.hadoop.hbase.master">LoadBalancer</a></code></dd>
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<h4>setRackManager</h4>
<pre>public&nbsp;void&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#line.1208">setRackManager</a>(<a href="../../../../../../org/apache/hadoop/hbase/master/RackManager.html" title="class in org.apache.hadoop.hbase.master">RackManager</a>&nbsp;rackManager)</pre>
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<h4>needsBalance</h4>
<pre>protected&nbsp;boolean&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#line.1212">needsBalance</a>(<a href="../../../../../../org/apache/hadoop/hbase/TableName.html" title="class in org.apache.hadoop.hbase">TableName</a>&nbsp;tableName,
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<h4>areSomeRegionReplicasColocated</h4>
<pre>protected&nbsp;boolean&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#line.1253">areSomeRegionReplicasColocated</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;c)</pre>
<div class="block">Subclasses should implement this to return true if the cluster has nodes that hosts
multiple replicas for the same region, or, if there are multiple racks and the same
rack hosts replicas of the same region</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>c</code> - Cluster information</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>whether region replicas are currently co-located</dd>
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<h4>idleRegionServerExist</h4>
<pre>protected final&nbsp;boolean&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#line.1257">idleRegionServerExist</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;c)</pre>
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<h4>roundRobinAssignment</h4>
<pre>@NonNull
public&nbsp;<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;<a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#line.1290">roundRobinAssignment</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;&nbsp;regions,
<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/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>&gt;&nbsp;servers)
throws <a href="../../../../../../org/apache/hadoop/hbase/HBaseIOException.html" title="class in org.apache.hadoop.hbase">HBaseIOException</a></pre>
<div class="block">Generates a bulk assignment plan to be used on cluster startup using a
simple round-robin assignment.
<p>
Takes a list of all the regions and all the servers in the cluster and
returns a map of each server to the regions that it should be assigned.
<p>
Currently implemented as a round-robin assignment. Same invariant as load
balancing, all servers holding floor(avg) or ceiling(avg).
TODO: Use block locations from HDFS to place regions with their blocks</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../org/apache/hadoop/hbase/master/LoadBalancer.html#roundRobinAssignment-java.util.List-java.util.List-">roundRobinAssignment</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../org/apache/hadoop/hbase/master/LoadBalancer.html" title="interface in org.apache.hadoop.hbase.master">LoadBalancer</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>regions</code> - all regions</dd>
<dd><code>servers</code> - all servers</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>map of server to the regions it should take, or emptyMap if no
assignment is possible (ie. no servers)</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="../../../../../../org/apache/hadoop/hbase/HBaseIOException.html" title="class in org.apache.hadoop.hbase">HBaseIOException</a></code></dd>
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<h4>createCluster</h4>
<pre>protected&nbsp;<a href="../../../../../../org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.Cluster.html" title="class in org.apache.hadoop.hbase.master.balancer">BaseLoadBalancer.Cluster</a>&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#line.1333">createCluster</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/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>&gt;&nbsp;servers,
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a>&lt;<a href="../../../../../../org/apache/hadoop/hbase/client/RegionInfo.html" title="interface in org.apache.hadoop.hbase.client">RegionInfo</a>&gt;&nbsp;regions)
throws <a href="../../../../../../org/apache/hadoop/hbase/HBaseIOException.html" title="class in org.apache.hadoop.hbase">HBaseIOException</a></pre>
<dl>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="../../../../../../org/apache/hadoop/hbase/HBaseIOException.html" title="class in org.apache.hadoop.hbase">HBaseIOException</a></code></dd>
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<a name="findIdleServers-java.util.List-">
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<h4>findIdleServers</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/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>&gt;&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#line.1372">findIdleServers</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/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>&gt;&nbsp;servers)</pre>
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<h4>randomAssignment</h4>
<pre>public&nbsp;<a href="../../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#line.1381">randomAssignment</a>(<a href="../../../../../../org/apache/hadoop/hbase/client/RegionInfo.html" title="interface in org.apache.hadoop.hbase.client">RegionInfo</a>&nbsp;regionInfo,
<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/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>&gt;&nbsp;servers)
throws <a href="../../../../../../org/apache/hadoop/hbase/HBaseIOException.html" title="class in org.apache.hadoop.hbase">HBaseIOException</a></pre>
<div class="block">Used to assign a single region to a random server.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../org/apache/hadoop/hbase/master/LoadBalancer.html#randomAssignment-org.apache.hadoop.hbase.client.RegionInfo-java.util.List-">randomAssignment</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../org/apache/hadoop/hbase/master/LoadBalancer.html" title="interface in org.apache.hadoop.hbase.master">LoadBalancer</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>regionInfo</code> - Region for which this selection is being done.</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="../../../../../../org/apache/hadoop/hbase/HBaseIOException.html" title="class in org.apache.hadoop.hbase">HBaseIOException</a></code></dd>
</dl>
</li>
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<h4>retainAssignment</h4>
<pre>@NonNull
public&nbsp;<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;<a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#line.1434">retainAssignment</a>(<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/client/RegionInfo.html" title="interface in org.apache.hadoop.hbase.client">RegionInfo</a>,<a href="../../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>&gt;&nbsp;regions,
<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/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>&gt;&nbsp;servers)
throws <a href="../../../../../../org/apache/hadoop/hbase/HBaseIOException.html" title="class in org.apache.hadoop.hbase">HBaseIOException</a></pre>
<div class="block">Generates a bulk assignment startup plan, attempting to reuse the existing
assignment information from META, but adjusting for the specified list of
available/online servers available for assignment.
<p>
Takes a map of all regions to their existing assignment from META. Also
takes a list of online servers for regions to be assigned to. Attempts to
retain all assignment, so in some instances initial assignment will not be
completely balanced.
<p>
Any leftover regions without an existing server to be assigned to will be
assigned randomly to available servers.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../org/apache/hadoop/hbase/master/LoadBalancer.html#retainAssignment-java.util.Map-java.util.List-">retainAssignment</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../org/apache/hadoop/hbase/master/LoadBalancer.html" title="interface in org.apache.hadoop.hbase.master">LoadBalancer</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>regions</code> - regions and existing assignment from meta</dd>
<dd><code>servers</code> - available servers</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>map of servers and regions to be assigned to them, or emptyMap if no
assignment is possible (ie. no servers)</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="../../../../../../org/apache/hadoop/hbase/HBaseIOException.html" title="class in org.apache.hadoop.hbase">HBaseIOException</a></code></dd>
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<h4>initialize</h4>
<pre>public&nbsp;void&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#line.1555">initialize</a>()
throws <a href="../../../../../../org/apache/hadoop/hbase/HBaseIOException.html" title="class in org.apache.hadoop.hbase">HBaseIOException</a></pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../../../org/apache/hadoop/hbase/master/LoadBalancer.html#initialize--">LoadBalancer</a></code></span></div>
<div class="block">Initialize the load balancer. Must be called after setters.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../org/apache/hadoop/hbase/master/LoadBalancer.html#initialize--">initialize</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../org/apache/hadoop/hbase/master/LoadBalancer.html" title="interface in org.apache.hadoop.hbase.master">LoadBalancer</a></code></dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="../../../../../../org/apache/hadoop/hbase/HBaseIOException.html" title="class in org.apache.hadoop.hbase">HBaseIOException</a></code></dd>
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<h4>regionOnline</h4>
<pre>public&nbsp;void&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#line.1559">regionOnline</a>(<a href="../../../../../../org/apache/hadoop/hbase/client/RegionInfo.html" title="interface in org.apache.hadoop.hbase.client">RegionInfo</a>&nbsp;regionInfo,
<a href="../../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>&nbsp;sn)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../../../org/apache/hadoop/hbase/master/LoadBalancer.html#regionOnline-org.apache.hadoop.hbase.client.RegionInfo-org.apache.hadoop.hbase.ServerName-">LoadBalancer</a></code></span></div>
<div class="block">Marks the region as online at balancer.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../org/apache/hadoop/hbase/master/LoadBalancer.html#regionOnline-org.apache.hadoop.hbase.client.RegionInfo-org.apache.hadoop.hbase.ServerName-">regionOnline</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../org/apache/hadoop/hbase/master/LoadBalancer.html" title="interface in org.apache.hadoop.hbase.master">LoadBalancer</a></code></dd>
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<h4>regionOffline</h4>
<pre>public&nbsp;void&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#line.1563">regionOffline</a>(<a href="../../../../../../org/apache/hadoop/hbase/client/RegionInfo.html" title="interface in org.apache.hadoop.hbase.client">RegionInfo</a>&nbsp;regionInfo)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../../../org/apache/hadoop/hbase/master/LoadBalancer.html#regionOffline-org.apache.hadoop.hbase.client.RegionInfo-">LoadBalancer</a></code></span></div>
<div class="block">Marks the region as offline at balancer.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../org/apache/hadoop/hbase/master/LoadBalancer.html#regionOffline-org.apache.hadoop.hbase.client.RegionInfo-">regionOffline</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../org/apache/hadoop/hbase/master/LoadBalancer.html" title="interface in org.apache.hadoop.hbase.master">LoadBalancer</a></code></dd>
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<h4>isStopped</h4>
<pre>public&nbsp;boolean&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#line.1567">isStopped</a>()</pre>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../org/apache/hadoop/hbase/Stoppable.html#isStopped--">isStopped</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../org/apache/hadoop/hbase/Stoppable.html" title="interface in org.apache.hadoop.hbase">Stoppable</a></code></dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>True if <a href="../../../../../../org/apache/hadoop/hbase/Stoppable.html#stop-java.lang.String-"><code>Stoppable.stop(String)</code></a> has been closed.</dd>
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<a name="stop-java.lang.String-">
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<ul class="blockList">
<li class="blockList">
<h4>stop</h4>
<pre>public&nbsp;void&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#line.1572">stop</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;why)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../../../org/apache/hadoop/hbase/Stoppable.html#stop-java.lang.String-">Stoppable</a></code></span></div>
<div class="block">Stop this service.
Implementers should favor logging errors over throwing RuntimeExceptions.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../org/apache/hadoop/hbase/Stoppable.html#stop-java.lang.String-">stop</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../org/apache/hadoop/hbase/Stoppable.html" title="interface in org.apache.hadoop.hbase">Stoppable</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>why</code> - Why we're stopping.</dd>
</dl>
</li>
</ul>
<a name="updateBalancerStatus-boolean-">
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<h4>updateBalancerStatus</h4>
<pre>public&nbsp;void&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#line.1580">updateBalancerStatus</a>(boolean&nbsp;status)</pre>
<div class="block">Updates the balancer status tag reported to JMX</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../org/apache/hadoop/hbase/master/LoadBalancer.html#updateBalancerStatus-boolean-">updateBalancerStatus</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../org/apache/hadoop/hbase/master/LoadBalancer.html" title="interface in org.apache.hadoop.hbase.master">LoadBalancer</a></code></dd>
</dl>
</li>
</ul>
<a name="randomAssignment-org.apache.hadoop.hbase.master.balancer.BaseLoadBalancer.Cluster-org.apache.hadoop.hbase.client.RegionInfo-java.util.List-">
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<h4>randomAssignment</h4>
<pre>private&nbsp;<a href="../../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#line.1587">randomAssignment</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,
<a href="../../../../../../org/apache/hadoop/hbase/client/RegionInfo.html" title="interface in org.apache.hadoop.hbase.client">RegionInfo</a>&nbsp;regionInfo,
<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/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>&gt;&nbsp;servers)</pre>
<div class="block">Used to assign a single region to a random server.</div>
</li>
</ul>
<a name="roundRobinAssignment-org.apache.hadoop.hbase.master.balancer.BaseLoadBalancer.Cluster-java.util.List-java.util.List-java.util.Map-">
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<h4>roundRobinAssignment</h4>
<pre>private&nbsp;void&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#line.1623">roundRobinAssignment</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,
<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;&nbsp;regions,
<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/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>&gt;&nbsp;servers,
<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;assignments)</pre>
<div class="block">Round robin a list of regions to a list of servers</div>
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<h4>getRegionAssignmentsByServer</h4>
<pre>protected&nbsp;<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;<a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#line.1682">getRegionAssignmentsByServer</a>(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a>&lt;<a href="../../../../../../org/apache/hadoop/hbase/client/RegionInfo.html" title="interface in org.apache.hadoop.hbase.client">RegionInfo</a>&gt;&nbsp;regions)</pre>
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<h4>toEnsumbleTableLoad</h4>
<pre>private&nbsp;<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;<a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#line.1691">toEnsumbleTableLoad</a>(<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/TableName.html" title="class in org.apache.hadoop.hbase">TableName</a>,<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;&gt;&nbsp;LoadOfAllTable)</pre>
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<h4>balanceTable</h4>
<pre>public abstract&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/BaseLoadBalancer.html#line.1705">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"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../../../org/apache/hadoop/hbase/master/LoadBalancer.html#balanceTable-org.apache.hadoop.hbase.TableName-java.util.Map-">LoadBalancer</a></code></span></div>
<div class="block">Perform the major balance operation for table, all class implement of <a href="../../../../../../org/apache/hadoop/hbase/master/LoadBalancer.html" title="interface in org.apache.hadoop.hbase.master"><code>LoadBalancer</code></a>
should override this method</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../org/apache/hadoop/hbase/master/LoadBalancer.html#balanceTable-org.apache.hadoop.hbase.TableName-java.util.Map-">balanceTable</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../org/apache/hadoop/hbase/master/LoadBalancer.html" title="interface in org.apache.hadoop.hbase.master">LoadBalancer</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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<h4>balanceCluster</h4>
<pre>public&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/BaseLoadBalancer.html#line.1710">balanceCluster</a>(<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/TableName.html" title="class in org.apache.hadoop.hbase">TableName</a>,<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;&gt;&nbsp;loadOfAllTable)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../../../org/apache/hadoop/hbase/master/LoadBalancer.html#balanceCluster-java.util.Map-">LoadBalancer</a></code></span></div>
<div class="block">Perform the major balance operation for cluster, will invoke <a href="../../../../../../org/apache/hadoop/hbase/master/LoadBalancer.html#balanceTable-org.apache.hadoop.hbase.TableName-java.util.Map-"><code>LoadBalancer.balanceTable(org.apache.hadoop.hbase.TableName, java.util.Map&lt;org.apache.hadoop.hbase.ServerName, java.util.List&lt;org.apache.hadoop.hbase.client.RegionInfo&gt;&gt;)</code></a> to do actual
balance. Normally not need override this method, except
<a href="../../../../../../org/apache/hadoop/hbase/master/balancer/SimpleLoadBalancer.html" title="class in org.apache.hadoop.hbase.master.balancer"><code>SimpleLoadBalancer</code></a> and
<a href="../../../../../../org/apache/hadoop/hbase/rsgroup/RSGroupBasedLoadBalancer.html" title="class in org.apache.hadoop.hbase.rsgroup"><code>RSGroupBasedLoadBalancer</code></a></div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../org/apache/hadoop/hbase/master/LoadBalancer.html#balanceCluster-java.util.Map-">balanceCluster</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../org/apache/hadoop/hbase/master/LoadBalancer.html" title="interface in org.apache.hadoop.hbase.master">LoadBalancer</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>loadOfAllTable</code> - region load of servers for all table</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>a list of regions to be moved, including source and destination, or null if cluster is
already balanced</dd>
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<h4>onConfigurationChange</h4>
<pre>public&nbsp;void&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.html#line.1728">onConfigurationChange</a>(org.apache.hadoop.conf.Configuration&nbsp;conf)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../../../org/apache/hadoop/hbase/master/LoadBalancer.html#onConfigurationChange-org.apache.hadoop.conf.Configuration-">LoadBalancer</a></code></span></div>
<div class="block">Notification that config has changed</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../org/apache/hadoop/hbase/conf/ConfigurationObserver.html#onConfigurationChange-org.apache.hadoop.conf.Configuration-">onConfigurationChange</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../org/apache/hadoop/hbase/conf/ConfigurationObserver.html" title="interface in org.apache.hadoop.hbase.conf">ConfigurationObserver</a></code></dd>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../org/apache/hadoop/hbase/master/LoadBalancer.html#onConfigurationChange-org.apache.hadoop.conf.Configuration-">onConfigurationChange</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../org/apache/hadoop/hbase/master/LoadBalancer.html" title="interface in org.apache.hadoop.hbase.master">LoadBalancer</a></code></dd>
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