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<div class="subTitle">org.apache.hadoop.hbase.master.balancer</div>
<h2 title="Class MasterClusterInfoProvider" class="title">Class MasterClusterInfoProvider</h2>
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<li>org.apache.hadoop.hbase.master.balancer.MasterClusterInfoProvider</li>
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<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/balancer/ClusterInfoProvider.html" title="interface in org.apache.hadoop.hbase.master.balancer">ClusterInfoProvider</a></dd>
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<pre>@InterfaceAudience.Private
public class <a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/MasterClusterInfoProvider.html#line.53">MasterClusterInfoProvider</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/balancer/ClusterInfoProvider.html" title="interface in org.apache.hadoop.hbase.master.balancer">ClusterInfoProvider</a></pre>
<div class="block">Master based cluster info provider.</div>
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<caption><span>Fields</span><span class="tabEnd">&nbsp;</span></caption>
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<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Field and Description</th>
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<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/MasterClusterInfoProvider.html#isBalancerDecisionRecording">isBalancerDecisionRecording</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/MasterClusterInfoProvider.html#isBalancerRejectionRecording">isBalancerRejectionRecording</a></span></code>&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>private <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/MasterClusterInfoProvider.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>private <a href="../../../../../../org/apache/hadoop/hbase/regionserver/compactions/OffPeakHours.html" title="class in org.apache.hadoop.hbase.regionserver.compactions">OffPeakHours</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/MasterClusterInfoProvider.html#offPeakHours">offPeakHours</a></span></code>&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>private <a href="../../../../../../org/apache/hadoop/hbase/master/MasterServices.html" title="interface in org.apache.hadoop.hbase.master">MasterServices</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/MasterClusterInfoProvider.html#services">services</a></span></code>&nbsp;</td>
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/MasterClusterInfoProvider.html#MasterClusterInfoProvider-org.apache.hadoop.hbase.master.MasterServices-">MasterClusterInfoProvider</a></span>(<a href="../../../../../../org/apache/hadoop/hbase/master/MasterServices.html" title="interface in org.apache.hadoop.hbase.master">MasterServices</a>&nbsp;services)</code>&nbsp;</td>
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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="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd">&nbsp;</span></span></caption>
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<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Method and Description</th>
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<tr id="i0" class="altColor">
<td class="colFirst"><code><a href="../../../../../../org/apache/hadoop/hbase/HDFSBlocksDistribution.html" title="class in org.apache.hadoop.hbase">HDFSBlocksDistribution</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/MasterClusterInfoProvider.html#computeHDFSBlocksDistribution-org.apache.hadoop.conf.Configuration-org.apache.hadoop.hbase.client.TableDescriptor-org.apache.hadoop.hbase.client.RegionInfo-">computeHDFSBlocksDistribution</a></span>(org.apache.hadoop.conf.Configuration&nbsp;conf,
<a href="../../../../../../org/apache/hadoop/hbase/client/TableDescriptor.html" title="interface in org.apache.hadoop.hbase.client">TableDescriptor</a>&nbsp;tableDescriptor,
<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">Compute the block distribution for the given region.</div>
</td>
</tr>
<tr id="i1" class="rowColor">
<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/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/MasterClusterInfoProvider.html#getAssignedRegions--">getAssignedRegions</a></span>()</code>
<div class="block">Get all the regions of this cluster.</div>
</td>
</tr>
<tr id="i2" 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/MasterClusterInfoProvider.html#getConfiguration--">getConfiguration</a></span>()</code>
<div class="block">Get the configuration.</div>
</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code><a href="../../../../../../org/apache/hadoop/hbase/client/Connection.html" title="interface in org.apache.hadoop.hbase.client">Connection</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/MasterClusterInfoProvider.html#getConnection--">getConnection</a></span>()</code>
<div class="block">Returns a reference to the cluster's connection.</div>
</td>
</tr>
<tr id="i4" class="altColor">
<td class="colFirst"><code><a href="../../../../../../org/apache/hadoop/hbase/ServerMetrics.html" title="interface in org.apache.hadoop.hbase">ServerMetrics</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/MasterClusterInfoProvider.html#getLoad-org.apache.hadoop.hbase.ServerName-">getLoad</a></span>(<a href="../../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>&nbsp;serverName)</code>
<div class="block">Returns server metrics of the given server if serverName is known else null</div>
</td>
</tr>
<tr id="i5" class="rowColor">
<td class="colFirst"><code>(package private) <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/MasterClusterInfoProvider.html#getNamedQueueRecorder--">getNamedQueueRecorder</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i6" class="altColor">
<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/MasterClusterInfoProvider.html#getNumberOfTables--">getNumberOfTables</a></span>()</code>
<div class="block">Returns the number of tables on this cluster.</div>
</td>
</tr>
<tr id="i7" class="rowColor">
<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/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/MasterClusterInfoProvider.html#getOnlineServersList--">getOnlineServersList</a></span>()</code>
<div class="block">Returns a copy of the internal list of online servers.</div>
</td>
</tr>
<tr id="i8" 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/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/MasterClusterInfoProvider.html#getOnlineServersListWithPredicator-java.util.List-java.util.function.Predicate-">getOnlineServersListWithPredicator</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/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;&nbsp;filter)</code>
<div class="block">Returns a copy of the internal list of online servers matched by the given <code>filter</code>.</div>
</td>
</tr>
<tr id="i9" class="rowColor">
<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/MasterClusterInfoProvider.html#getSnapShotOfAssignment-java.util.Collection-">getSnapShotOfAssignment</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>
<div class="block">Get a snapshot of the current assignment status.</div>
</td>
</tr>
<tr id="i10" class="altColor">
<td class="colFirst"><code><a href="../../../../../../org/apache/hadoop/hbase/client/TableDescriptor.html" title="interface in org.apache.hadoop.hbase.client">TableDescriptor</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/MasterClusterInfoProvider.html#getTableDescriptor-org.apache.hadoop.hbase.TableName-">getTableDescriptor</a></span>(<a href="../../../../../../org/apache/hadoop/hbase/TableName.html" title="class in org.apache.hadoop.hbase">TableName</a>&nbsp;tableName)</code>
<div class="block">Get the table descriptor for the given table.</div>
</td>
</tr>
<tr id="i11" class="rowColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/MasterClusterInfoProvider.html#hasRegionReplica-java.util.Collection-">hasRegionReplica</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>
<div class="block">Check whether we have region replicas enabled for the tables of the given regions.</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/MasterClusterInfoProvider.html#isOffPeakHour--">isOffPeakHour</a></span>()</code>
<div class="block">Test whether we are in off peak hour.</div>
</td>
</tr>
<tr id="i13" 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/MasterClusterInfoProvider.html#loadConf-org.apache.hadoop.conf.Configuration-">loadConf</a></span>(org.apache.hadoop.conf.Configuration&nbsp;conf)</code>&nbsp;</td>
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<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/MasterClusterInfoProvider.html#onConfigurationChange-org.apache.hadoop.conf.Configuration-">onConfigurationChange</a></span>(org.apache.hadoop.conf.Configuration&nbsp;conf)</code>
<div class="block">This method would be called by the <a href="../../../../../../org/apache/hadoop/hbase/conf/ConfigurationManager.html" title="class in org.apache.hadoop.hbase.conf"><code>ConfigurationManager</code></a>
object when the <code>Configuration</code> object is reloaded from disk.</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/MasterClusterInfoProvider.html#recordBalancerDecision-java.util.function.Supplier-">recordBalancerDecision</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="../../../../../../org/apache/hadoop/hbase/client/BalancerDecision.html" title="class in org.apache.hadoop.hbase.client">BalancerDecision</a>&gt;&nbsp;decision)</code>
<div class="block">Record the given balancer decision.</div>
</td>
</tr>
<tr id="i16" class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/MasterClusterInfoProvider.html#recordBalancerRejection-java.util.function.Supplier-">recordBalancerRejection</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="../../../../../../org/apache/hadoop/hbase/client/BalancerRejection.html" title="class in org.apache.hadoop.hbase.client">BalancerRejection</a>&gt;&nbsp;rejection)</code>
<div class="block">Record the given balancer rejection.</div>
</td>
</tr>
<tr id="i17" class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/MasterClusterInfoProvider.html#unassign-org.apache.hadoop.hbase.client.RegionInfo-">unassign</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">Unassign the given region.</div>
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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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<h4>services</h4>
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<pre>private&nbsp;boolean <a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/MasterClusterInfoProvider.html#line.57">isBalancerDecisionRecording</a></pre>
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<pre>private&nbsp;boolean <a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/MasterClusterInfoProvider.html#line.59">isBalancerRejectionRecording</a></pre>
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<pre>private&nbsp;<a href="../../../../../../org/apache/hadoop/hbase/namequeues/NamedQueueRecorder.html" title="class in org.apache.hadoop.hbase.namequeues">NamedQueueRecorder</a> <a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/MasterClusterInfoProvider.html#line.64">namedQueueRecorder</a></pre>
<div class="block">Use to add balancer decision history to ring-buffer</div>
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<pre>private&nbsp;void&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/MasterClusterInfoProvider.html#line.68">loadConf</a>(org.apache.hadoop.conf.Configuration&nbsp;conf)</pre>
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<pre>public&nbsp;org.apache.hadoop.conf.Configuration&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/MasterClusterInfoProvider.html#line.88">getConfiguration</a>()</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/ClusterInfoProvider.html#getConfiguration--">ClusterInfoProvider</a></code></span></div>
<div class="block">Get the configuration.</div>
<dl>
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<dd><code><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/ClusterInfoProvider.html#getConfiguration--">getConfiguration</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/ClusterInfoProvider.html" title="interface in org.apache.hadoop.hbase.master.balancer">ClusterInfoProvider</a></code></dd>
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<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/ClusterInfoProvider.html#getConnection--">ClusterInfoProvider</a></code></span></div>
<div class="block">Returns a reference to the cluster's connection.</div>
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<dd><code><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/ClusterInfoProvider.html#getConnection--">getConnection</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/ClusterInfoProvider.html" title="interface in org.apache.hadoop.hbase.master.balancer">ClusterInfoProvider</a></code></dd>
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<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/ClusterInfoProvider.html#getAssignedRegions--">ClusterInfoProvider</a></code></span></div>
<div class="block">Get all the regions of this cluster.
<p/>
Used to refresh region block locations on HDFS.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/ClusterInfoProvider.html#getAssignedRegions--">getAssignedRegions</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/ClusterInfoProvider.html" title="interface in org.apache.hadoop.hbase.master.balancer">ClusterInfoProvider</a></code></dd>
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<pre>public&nbsp;void&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/MasterClusterInfoProvider.html#line.104">unassign</a>(<a href="../../../../../../org/apache/hadoop/hbase/client/RegionInfo.html" title="interface in org.apache.hadoop.hbase.client">RegionInfo</a>&nbsp;regionInfo)
throws <a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/ClusterInfoProvider.html#unassign-org.apache.hadoop.hbase.client.RegionInfo-">ClusterInfoProvider</a></code></span></div>
<div class="block">Unassign the given region.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/ClusterInfoProvider.html#unassign-org.apache.hadoop.hbase.client.RegionInfo-">unassign</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/ClusterInfoProvider.html" title="interface in org.apache.hadoop.hbase.master.balancer">ClusterInfoProvider</a></code></dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code></dd>
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<pre>public&nbsp;<a href="../../../../../../org/apache/hadoop/hbase/client/TableDescriptor.html" title="interface in org.apache.hadoop.hbase.client">TableDescriptor</a>&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/MasterClusterInfoProvider.html#line.112">getTableDescriptor</a>(<a href="../../../../../../org/apache/hadoop/hbase/TableName.html" title="class in org.apache.hadoop.hbase">TableName</a>&nbsp;tableName)
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<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/ClusterInfoProvider.html#getTableDescriptor-org.apache.hadoop.hbase.TableName-">ClusterInfoProvider</a></code></span></div>
<div class="block">Get the table descriptor for the given table.</div>
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<dd><code><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/ClusterInfoProvider.html#getTableDescriptor-org.apache.hadoop.hbase.TableName-">getTableDescriptor</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/ClusterInfoProvider.html" title="interface in org.apache.hadoop.hbase.master.balancer">ClusterInfoProvider</a></code></dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code></dd>
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<pre>public&nbsp;<a href="../../../../../../org/apache/hadoop/hbase/HDFSBlocksDistribution.html" title="class in org.apache.hadoop.hbase">HDFSBlocksDistribution</a>&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/MasterClusterInfoProvider.html#line.118">computeHDFSBlocksDistribution</a>(org.apache.hadoop.conf.Configuration&nbsp;conf,
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<a href="../../../../../../org/apache/hadoop/hbase/client/RegionInfo.html" title="interface in org.apache.hadoop.hbase.client">RegionInfo</a>&nbsp;regionInfo)
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<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/ClusterInfoProvider.html#computeHDFSBlocksDistribution-org.apache.hadoop.conf.Configuration-org.apache.hadoop.hbase.client.TableDescriptor-org.apache.hadoop.hbase.client.RegionInfo-">ClusterInfoProvider</a></code></span></div>
<div class="block">Compute the block distribution for the given region.
<p/>
Used to refresh region block locations on HDFS.</div>
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<dd><code><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/ClusterInfoProvider.html#computeHDFSBlocksDistribution-org.apache.hadoop.conf.Configuration-org.apache.hadoop.hbase.client.TableDescriptor-org.apache.hadoop.hbase.client.RegionInfo-">computeHDFSBlocksDistribution</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/ClusterInfoProvider.html" title="interface in org.apache.hadoop.hbase.master.balancer">ClusterInfoProvider</a></code></dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code></dd>
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<pre>public&nbsp;boolean&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/MasterClusterInfoProvider.html#line.124">hasRegionReplica</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)
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<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/ClusterInfoProvider.html#hasRegionReplica-java.util.Collection-">ClusterInfoProvider</a></code></span></div>
<div class="block">Check whether we have region replicas enabled for the tables of the given regions.</div>
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<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code></dd>
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<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/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>&gt;&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/MasterClusterInfoProvider.html#line.139">getOnlineServersList</a>()</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/ClusterInfoProvider.html#getOnlineServersList--">ClusterInfoProvider</a></code></span></div>
<div class="block">Returns a copy of the internal list of online servers.</div>
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<dd><code><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/ClusterInfoProvider.html#getOnlineServersList--">getOnlineServersList</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/ClusterInfoProvider.html" title="interface in org.apache.hadoop.hbase.master.balancer">ClusterInfoProvider</a></code></dd>
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<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/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>&gt;&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/MasterClusterInfoProvider.html#line.145">getOnlineServersListWithPredicator</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,
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<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/ClusterInfoProvider.html#getOnlineServersListWithPredicator-java.util.List-java.util.function.Predicate-">ClusterInfoProvider</a></code></span></div>
<div class="block">Returns a copy of the internal list of online servers matched by the given <code>filter</code>.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/ClusterInfoProvider.html#getOnlineServersListWithPredicator-java.util.List-java.util.function.Predicate-">getOnlineServersListWithPredicator</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/ClusterInfoProvider.html" title="interface in org.apache.hadoop.hbase.master.balancer">ClusterInfoProvider</a></code></dd>
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<h4>getSnapShotOfAssignment</h4>
<pre>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/MasterClusterInfoProvider.html#line.153">getSnapShotOfAssignment</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>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/ClusterInfoProvider.html#getSnapShotOfAssignment-java.util.Collection-">ClusterInfoProvider</a></code></span></div>
<div class="block">Get a snapshot of the current assignment status.</div>
<dl>
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<dd><code><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/ClusterInfoProvider.html#getSnapShotOfAssignment-java.util.Collection-">getSnapShotOfAssignment</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/ClusterInfoProvider.html" title="interface in org.apache.hadoop.hbase.master.balancer">ClusterInfoProvider</a></code></dd>
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<pre>public&nbsp;int&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/MasterClusterInfoProvider.html#line.159">getNumberOfTables</a>()
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<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/ClusterInfoProvider.html#getNumberOfTables--">ClusterInfoProvider</a></code></span></div>
<div class="block">Returns the number of tables on this cluster.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/ClusterInfoProvider.html#getNumberOfTables--">getNumberOfTables</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/ClusterInfoProvider.html" title="interface in org.apache.hadoop.hbase.master.balancer">ClusterInfoProvider</a></code></dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code></dd>
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<pre>public&nbsp;boolean&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/MasterClusterInfoProvider.html#line.164">isOffPeakHour</a>()</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/ClusterInfoProvider.html#isOffPeakHour--">ClusterInfoProvider</a></code></span></div>
<div class="block">Test whether we are in off peak hour.
<p/>
For peak and off peak hours we may have different cost for the same balancing operation.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/ClusterInfoProvider.html#isOffPeakHour--">isOffPeakHour</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/ClusterInfoProvider.html" title="interface in org.apache.hadoop.hbase.master.balancer">ClusterInfoProvider</a></code></dd>
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<h4>onConfigurationChange</h4>
<pre>public&nbsp;void&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/MasterClusterInfoProvider.html#line.169">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/conf/ConfigurationObserver.html#onConfigurationChange-org.apache.hadoop.conf.Configuration-">ConfigurationObserver</a></code></span></div>
<div class="block">This method would be called by the <a href="../../../../../../org/apache/hadoop/hbase/conf/ConfigurationManager.html" title="class in org.apache.hadoop.hbase.conf"><code>ConfigurationManager</code></a>
object when the <code>Configuration</code> object is reloaded from disk.</div>
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<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>
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<pre>public&nbsp;void&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/MasterClusterInfoProvider.html#line.174">recordBalancerDecision</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="../../../../../../org/apache/hadoop/hbase/client/BalancerDecision.html" title="class in org.apache.hadoop.hbase.client">BalancerDecision</a>&gt;&nbsp;decision)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/ClusterInfoProvider.html#recordBalancerDecision-java.util.function.Supplier-">ClusterInfoProvider</a></code></span></div>
<div class="block">Record the given balancer decision.</div>
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<h4>recordBalancerRejection</h4>
<pre>public&nbsp;void&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/MasterClusterInfoProvider.html#line.181">recordBalancerRejection</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="../../../../../../org/apache/hadoop/hbase/client/BalancerRejection.html" title="class in org.apache.hadoop.hbase.client">BalancerRejection</a>&gt;&nbsp;rejection)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/ClusterInfoProvider.html#recordBalancerRejection-java.util.function.Supplier-">ClusterInfoProvider</a></code></span></div>
<div class="block">Record the given balancer rejection.</div>
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<dd><code><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/ClusterInfoProvider.html#recordBalancerRejection-java.util.function.Supplier-">recordBalancerRejection</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/ClusterInfoProvider.html" title="interface in org.apache.hadoop.hbase.master.balancer">ClusterInfoProvider</a></code></dd>
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<pre>public&nbsp;<a href="../../../../../../org/apache/hadoop/hbase/ServerMetrics.html" title="interface in org.apache.hadoop.hbase">ServerMetrics</a>&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/MasterClusterInfoProvider.html#line.188">getLoad</a>(<a href="../../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>&nbsp;serverName)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/ClusterInfoProvider.html#getLoad-org.apache.hadoop.hbase.ServerName-">ClusterInfoProvider</a></code></span></div>
<div class="block">Returns server metrics of the given server if serverName is known else null</div>
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<dd><code><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/ClusterInfoProvider.html#getLoad-org.apache.hadoop.hbase.ServerName-">getLoad</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../org/apache/hadoop/hbase/master/balancer/ClusterInfoProvider.html" title="interface in org.apache.hadoop.hbase.master.balancer">ClusterInfoProvider</a></code></dd>
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<pre><a href="../../../../../../org/apache/hadoop/hbase/namequeues/NamedQueueRecorder.html" title="class in org.apache.hadoop.hbase.namequeues">NamedQueueRecorder</a>&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/master/balancer/MasterClusterInfoProvider.html#line.195">getNamedQueueRecorder</a>()</pre>
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