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<div class="subTitle">org.apache.hadoop.yarn.server.resourcemanager.scheduler.distributed</div>
<h2 title="Class NodeQueueLoadMonitor" class="title">Class NodeQueueLoadMonitor</h2>
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<li>org.apache.hadoop.yarn.server.resourcemanager.scheduler.distributed.NodeQueueLoadMonitor</li>
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<pre>public class <span class="typeNameLabel">NodeQueueLoadMonitor</span>
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/yarn/server/resourcemanager/ClusterMonitor.html" title="interface in org.apache.hadoop.yarn.server.resourcemanager">ClusterMonitor</a></pre>
<div class="block">The NodeQueueLoadMonitor keeps track of load metrics (such as queue length
and total wait time) associated with Container Queues on the Node Manager.
It uses this information to periodically sort the Nodes from least to most
loaded.</div>
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<td class="colFirst"><code>static class&nbsp;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/distributed/NodeQueueLoadMonitor.LoadComparator.html" title="enum in org.apache.hadoop.yarn.server.resourcemanager.scheduler.distributed">NodeQueueLoadMonitor.LoadComparator</a></span></code>
<div class="block">The comparator used to specify the metric against which the load
of two Nodes are compared.</div>
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/distributed/NodeQueueLoadMonitor.html#NodeQueueLoadMonitor-long-org.apache.hadoop.yarn.server.resourcemanager.scheduler.distributed.NodeQueueLoadMonitor.LoadComparator-int-">NodeQueueLoadMonitor</a></span>(long&nbsp;nodeComputationInterval,
<a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/distributed/NodeQueueLoadMonitor.LoadComparator.html" title="enum in org.apache.hadoop.yarn.server.resourcemanager.scheduler.distributed">NodeQueueLoadMonitor.LoadComparator</a>&nbsp;comparator,
int&nbsp;numNodes)</code>&nbsp;</td>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/distributed/NodeQueueLoadMonitor.html#addNode-java.util.List-org.apache.hadoop.yarn.server.resourcemanager.rmnode.RMNode-">addNode</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;org.apache.hadoop.yarn.server.api.protocolrecords.NMContainerStatus&gt;&nbsp;containerStatuses,
<a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/rmnode/RMNode.html" title="interface in org.apache.hadoop.yarn.server.resourcemanager.rmnode">RMNode</a>&nbsp;rmNode)</code>&nbsp;</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/distributed/QueueLimitCalculator.html" title="class in org.apache.hadoop.yarn.server.resourcemanager.scheduler.distributed">QueueLimitCalculator</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/distributed/NodeQueueLoadMonitor.html#getThresholdCalculator--">getThresholdCalculator</a></span>()</code>&nbsp;</td>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/distributed/NodeQueueLoadMonitor.html#initThresholdCalculator-float-int-int-">initThresholdCalculator</a></span>(float&nbsp;sigma,
int&nbsp;limitMin,
int&nbsp;limitMax)</code>&nbsp;</td>
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<tr id="i3" class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/distributed/NodeQueueLoadMonitor.html#removeNode-org.apache.hadoop.yarn.server.resourcemanager.rmnode.RMNode-">removeNode</a></span>(<a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/rmnode/RMNode.html" title="interface in org.apache.hadoop.yarn.server.resourcemanager.rmnode">RMNode</a>&nbsp;removedRMNode)</code>&nbsp;</td>
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<td class="colFirst"><code><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/rmnode/RMNode.html" title="interface in org.apache.hadoop.yarn.server.resourcemanager.rmnode">RMNode</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/distributed/NodeQueueLoadMonitor.html#selectAnyNode-java.util.Set-">selectAnyNode</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util">Set</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&gt;&nbsp;blacklist)</code>&nbsp;</td>
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<tr id="i5" 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;org.apache.hadoop.yarn.api.records.NodeId&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/distributed/NodeQueueLoadMonitor.html#selectLeastLoadedNodes-int-">selectLeastLoadedNodes</a></span>(int&nbsp;k)</code>
<div class="block">Returns 'K' of the least Loaded Node Ids as ordered list.</div>
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<tr id="i6" class="altColor">
<td class="colFirst"><code><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/rmnode/RMNode.html" title="interface in org.apache.hadoop.yarn.server.resourcemanager.rmnode">RMNode</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/distributed/NodeQueueLoadMonitor.html#selectLocalNode-java.lang.String-java.util.Set-">selectLocalNode</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;hostName,
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util">Set</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&gt;&nbsp;blacklist)</code>&nbsp;</td>
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<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;org.apache.hadoop.yarn.api.records.NodeId&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/distributed/NodeQueueLoadMonitor.html#selectNodes--">selectNodes</a></span>()</code>
<div class="block">Returns all Node Ids as ordered list from Least to Most Loaded.</div>
</td>
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<tr id="i8" class="altColor">
<td class="colFirst"><code><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/rmnode/RMNode.html" title="interface in org.apache.hadoop.yarn.server.resourcemanager.rmnode">RMNode</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/distributed/NodeQueueLoadMonitor.html#selectRackLocalNode-java.lang.String-java.util.Set-">selectRackLocalNode</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;rackName,
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util">Set</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&gt;&nbsp;blacklist)</code>&nbsp;</td>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/distributed/NodeQueueLoadMonitor.html#stop--">stop</a></span>()</code>&nbsp;</td>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/distributed/NodeQueueLoadMonitor.html#updateNode-org.apache.hadoop.yarn.server.resourcemanager.rmnode.RMNode-">updateNode</a></span>(<a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/rmnode/RMNode.html" title="interface in org.apache.hadoop.yarn.server.resourcemanager.rmnode">RMNode</a>&nbsp;rmNode)</code>&nbsp;</td>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/distributed/NodeQueueLoadMonitor.html#updateNodeResource-org.apache.hadoop.yarn.server.resourcemanager.rmnode.RMNode-org.apache.hadoop.yarn.api.records.ResourceOption-">updateNodeResource</a></span>(<a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/rmnode/RMNode.html" title="interface in org.apache.hadoop.yarn.server.resourcemanager.rmnode">RMNode</a>&nbsp;rmNode,
org.apache.hadoop.yarn.api.records.ResourceOption&nbsp;resourceOption)</code>&nbsp;</td>
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<h4>NodeQueueLoadMonitor</h4>
<pre>public&nbsp;NodeQueueLoadMonitor(long&nbsp;nodeComputationInterval,
<a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/distributed/NodeQueueLoadMonitor.LoadComparator.html" title="enum in org.apache.hadoop.yarn.server.resourcemanager.scheduler.distributed">NodeQueueLoadMonitor.LoadComparator</a>&nbsp;comparator,
int&nbsp;numNodes)</pre>
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<pre>public&nbsp;<a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/distributed/QueueLimitCalculator.html" title="class in org.apache.hadoop.yarn.server.resourcemanager.scheduler.distributed">QueueLimitCalculator</a>&nbsp;getThresholdCalculator()</pre>
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<pre>public&nbsp;void&nbsp;stop()</pre>
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<pre>public&nbsp;void&nbsp;initThresholdCalculator(float&nbsp;sigma,
int&nbsp;limitMin,
int&nbsp;limitMax)</pre>
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<pre>public&nbsp;void&nbsp;addNode(<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;org.apache.hadoop.yarn.server.api.protocolrecords.NMContainerStatus&gt;&nbsp;containerStatuses,
<a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/rmnode/RMNode.html" title="interface in org.apache.hadoop.yarn.server.resourcemanager.rmnode">RMNode</a>&nbsp;rmNode)</pre>
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<dd><code><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/ClusterMonitor.html#addNode-java.util.List-org.apache.hadoop.yarn.server.resourcemanager.rmnode.RMNode-">addNode</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/ClusterMonitor.html" title="interface in org.apache.hadoop.yarn.server.resourcemanager">ClusterMonitor</a></code></dd>
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<h4>removeNode</h4>
<pre>public&nbsp;void&nbsp;removeNode(<a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/rmnode/RMNode.html" title="interface in org.apache.hadoop.yarn.server.resourcemanager.rmnode">RMNode</a>&nbsp;removedRMNode)</pre>
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<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/ClusterMonitor.html#removeNode-org.apache.hadoop.yarn.server.resourcemanager.rmnode.RMNode-">removeNode</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/ClusterMonitor.html" title="interface in org.apache.hadoop.yarn.server.resourcemanager">ClusterMonitor</a></code></dd>
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<pre>public&nbsp;void&nbsp;updateNode(<a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/rmnode/RMNode.html" title="interface in org.apache.hadoop.yarn.server.resourcemanager.rmnode">RMNode</a>&nbsp;rmNode)</pre>
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<dd><code><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/ClusterMonitor.html#updateNode-org.apache.hadoop.yarn.server.resourcemanager.rmnode.RMNode-">updateNode</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/ClusterMonitor.html" title="interface in org.apache.hadoop.yarn.server.resourcemanager">ClusterMonitor</a></code></dd>
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<pre>public&nbsp;void&nbsp;updateNodeResource(<a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/rmnode/RMNode.html" title="interface in org.apache.hadoop.yarn.server.resourcemanager.rmnode">RMNode</a>&nbsp;rmNode,
org.apache.hadoop.yarn.api.records.ResourceOption&nbsp;resourceOption)</pre>
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<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/ClusterMonitor.html#updateNodeResource-org.apache.hadoop.yarn.server.resourcemanager.rmnode.RMNode-org.apache.hadoop.yarn.api.records.ResourceOption-">updateNodeResource</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/ClusterMonitor.html" title="interface in org.apache.hadoop.yarn.server.resourcemanager">ClusterMonitor</a></code></dd>
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<h4>selectNodes</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;org.apache.hadoop.yarn.api.records.NodeId&gt;&nbsp;selectNodes()</pre>
<div class="block">Returns all Node Ids as ordered list from Least to Most Loaded.</div>
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<dt><span class="returnLabel">Returns:</span></dt>
<dd>ordered list of nodes</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;org.apache.hadoop.yarn.api.records.NodeId&gt;&nbsp;selectLeastLoadedNodes(int&nbsp;k)</pre>
<div class="block">Returns 'K' of the least Loaded Node Ids as ordered list.</div>
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<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>k</code> - max number of nodes to return</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>ordered list of nodes</dd>
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<pre>public&nbsp;<a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/rmnode/RMNode.html" title="interface in org.apache.hadoop.yarn.server.resourcemanager.rmnode">RMNode</a>&nbsp;selectLocalNode(<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;hostName,
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util">Set</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&gt;&nbsp;blacklist)</pre>
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<pre>public&nbsp;<a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/rmnode/RMNode.html" title="interface in org.apache.hadoop.yarn.server.resourcemanager.rmnode">RMNode</a>&nbsp;selectRackLocalNode(<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;rackName,
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util">Set</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&gt;&nbsp;blacklist)</pre>
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<pre>public&nbsp;<a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/rmnode/RMNode.html" title="interface in org.apache.hadoop.yarn.server.resourcemanager.rmnode">RMNode</a>&nbsp;selectAnyNode(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util">Set</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&gt;&nbsp;blacklist)</pre>
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