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<div class="subTitle">org.apache.hadoop.hdfs.server.diskbalancer.datamodel</div>
<h2 title="Class DiskBalancerDataNode" class="title">Class DiskBalancerDataNode</h2>
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<li>org.apache.hadoop.hdfs.server.diskbalancer.datamodel.DiskBalancerDataNode</li>
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<pre>public class <span class="typeNameLabel">DiskBalancerDataNode</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="https://docs.oracle.com/javase/8/docs/api/java/lang/Comparable.html?is-external=true" title="class or interface in java.lang">Comparable</a>&lt;<a href="../../../../../../../org/apache/hadoop/hdfs/server/diskbalancer/datamodel/DiskBalancerDataNode.html" title="class in org.apache.hadoop.hdfs.server.diskbalancer.datamodel">DiskBalancerDataNode</a>&gt;</pre>
<div class="block">DiskBalancerDataNode represents a DataNode that exists in the cluster. It
also contains a metric called nodeDataDensity which allows us to compare
between a set of Nodes.</div>
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hdfs/server/diskbalancer/datamodel/DiskBalancerDataNode.html#DiskBalancerDataNode--">DiskBalancerDataNode</a></span>()</code>
<div class="block">Constructs an Empty Data Node.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hdfs/server/diskbalancer/datamodel/DiskBalancerDataNode.html#DiskBalancerDataNode-java.lang.String-">DiskBalancerDataNode</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;dataNodeID)</code>
<div class="block">Constructs a DataNode.</div>
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<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Method and Description</th>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hdfs/server/diskbalancer/datamodel/DiskBalancerDataNode.html#addVolume-org.apache.hadoop.hdfs.server.diskbalancer.datamodel.DiskBalancerVolume-">addVolume</a></span>(<a href="../../../../../../../org/apache/hadoop/hdfs/server/diskbalancer/datamodel/DiskBalancerVolume.html" title="class in org.apache.hadoop.hdfs.server.diskbalancer.datamodel">DiskBalancerVolume</a>&nbsp;volume)</code>
<div class="block">Adds a volume to the DataNode.</div>
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<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hdfs/server/diskbalancer/datamodel/DiskBalancerDataNode.html#compareTo-org.apache.hadoop.hdfs.server.diskbalancer.datamodel.DiskBalancerDataNode-">compareTo</a></span>(<a href="../../../../../../../org/apache/hadoop/hdfs/server/diskbalancer/datamodel/DiskBalancerDataNode.html" title="class in org.apache.hadoop.hdfs.server.diskbalancer.datamodel">DiskBalancerDataNode</a>&nbsp;that)</code>
<div class="block">Compares this object with the specified object for order.</div>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hdfs/server/diskbalancer/datamodel/DiskBalancerDataNode.html#computeNodeDensity--">computeNodeDensity</a></span>()</code>
<div class="block">Computes nodes data density.</div>
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<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hdfs/server/diskbalancer/datamodel/DiskBalancerDataNode.html#equals-java.lang.Object-">equals</a></span>(<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>&nbsp;obj)</code>
<div class="block">Indicates whether some other object is "equal to" this one.</div>
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<td class="colFirst"><code><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/hdfs/server/diskbalancer/datamodel/DiskBalancerDataNode.html#getDataNodeIP--">getDataNodeIP</a></span>()</code>
<div class="block">Returns the IP address of this Node.</div>
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<td class="colFirst"><code><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/hdfs/server/diskbalancer/datamodel/DiskBalancerDataNode.html#getDataNodeName--">getDataNodeName</a></span>()</code>
<div class="block">Get DataNode DNS name.</div>
</td>
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<tr id="i6" class="altColor">
<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hdfs/server/diskbalancer/datamodel/DiskBalancerDataNode.html#getDataNodePort--">getDataNodePort</a></span>()</code>
<div class="block">Returns the Port of this DataNode.</div>
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<td class="colFirst"><code><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/hdfs/server/diskbalancer/datamodel/DiskBalancerDataNode.html#getDataNodeUUID--">getDataNodeUUID</a></span>()</code>
<div class="block">Returns datanode ID.</div>
</td>
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<tr id="i8" class="altColor">
<td class="colFirst"><code>double</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hdfs/server/diskbalancer/datamodel/DiskBalancerDataNode.html#getNodeDataDensity--">getNodeDataDensity</a></span>()</code>
<div class="block">Returns NodeDataDensity Metric.</div>
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<tr id="i9" class="rowColor">
<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hdfs/server/diskbalancer/datamodel/DiskBalancerDataNode.html#getVolumeCount--">getVolumeCount</a></span>()</code>
<div class="block">Returns how many volumes are in the DataNode.</div>
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<tr id="i10" 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="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>,<a href="../../../../../../../org/apache/hadoop/hdfs/server/diskbalancer/datamodel/DiskBalancerVolumeSet.html" title="class in org.apache.hadoop.hdfs.server.diskbalancer.datamodel">DiskBalancerVolumeSet</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hdfs/server/diskbalancer/datamodel/DiskBalancerDataNode.html#getVolumeSets--">getVolumeSets</a></span>()</code>
<div class="block">Returns the Volume sets on this node.</div>
</td>
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<tr id="i11" class="rowColor">
<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hdfs/server/diskbalancer/datamodel/DiskBalancerDataNode.html#hashCode--">hashCode</a></span>()</code>
<div class="block">Returns a hash code value for the object.</div>
</td>
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<tr id="i12" class="altColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hdfs/server/diskbalancer/datamodel/DiskBalancerDataNode.html#isBalancingNeeded-double-">isBalancingNeeded</a></span>(double&nbsp;threshold)</code>
<div class="block">Computes if this node needs balancing at all.</div>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hdfs/server/diskbalancer/datamodel/DiskBalancerDataNode.html#setDataNodeIP-java.lang.String-">setDataNodeIP</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;ipaddress)</code>
<div class="block">Sets the IP address of this Node.</div>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hdfs/server/diskbalancer/datamodel/DiskBalancerDataNode.html#setDataNodeName-java.lang.String-">setDataNodeName</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;name)</code>
<div class="block">Sets node's DNS name.</div>
</td>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hdfs/server/diskbalancer/datamodel/DiskBalancerDataNode.html#setDataNodePort-int-">setDataNodePort</a></span>(int&nbsp;port)</code>
<div class="block">Sets the DataNode Port number.</div>
</td>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hdfs/server/diskbalancer/datamodel/DiskBalancerDataNode.html#setDataNodeUUID-java.lang.String-">setDataNodeUUID</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;nodeID)</code>
<div class="block">Sets Datanode UUID.</div>
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<h4>DiskBalancerDataNode</h4>
<pre>public&nbsp;DiskBalancerDataNode()</pre>
<div class="block">Constructs an Empty Data Node.</div>
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<pre>public&nbsp;DiskBalancerDataNode(<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;dataNodeID)</pre>
<div class="block">Constructs a DataNode.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>dataNodeID</code> - - Node ID</dd>
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<pre>public&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;getDataNodeIP()</pre>
<div class="block">Returns the IP address of this Node.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>IP Address string</dd>
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<pre>public&nbsp;void&nbsp;setDataNodeIP(<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;ipaddress)</pre>
<div class="block">Sets the IP address of this Node.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>ipaddress</code> - - IP Address</dd>
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<pre>public&nbsp;int&nbsp;getDataNodePort()</pre>
<div class="block">Returns the Port of this DataNode.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>Port Number</dd>
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<pre>public&nbsp;void&nbsp;setDataNodePort(int&nbsp;port)</pre>
<div class="block">Sets the DataNode Port number.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>port</code> - - Datanode Port Number</dd>
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<pre>public&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;getDataNodeName()</pre>
<div class="block">Get DataNode DNS name.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>name of the node</dd>
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<h4>setDataNodeName</h4>
<pre>public&nbsp;void&nbsp;setDataNodeName(<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;name)</pre>
<div class="block">Sets node's DNS name.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>name</code> - - Data node name</dd>
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<h4>getVolumeSets</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="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>,<a href="../../../../../../../org/apache/hadoop/hdfs/server/diskbalancer/datamodel/DiskBalancerVolumeSet.html" title="class in org.apache.hadoop.hdfs.server.diskbalancer.datamodel">DiskBalancerVolumeSet</a>&gt;&nbsp;getVolumeSets()</pre>
<div class="block">Returns the Volume sets on this node.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>a Map of VolumeSets</dd>
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<pre>public&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;getDataNodeUUID()</pre>
<div class="block">Returns datanode ID.</div>
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<pre>public&nbsp;void&nbsp;setDataNodeUUID(<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;nodeID)</pre>
<div class="block">Sets Datanode UUID.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>nodeID</code> - - Node ID.</dd>
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<pre>public&nbsp;boolean&nbsp;equals(<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>&nbsp;obj)</pre>
<div class="block">Indicates whether some other object is "equal to" this one.</div>
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<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code><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></code>&nbsp;in class&nbsp;<code><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></code></dd>
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<pre>public&nbsp;int&nbsp;compareTo(<a href="../../../../../../../org/apache/hadoop/hdfs/server/diskbalancer/datamodel/DiskBalancerDataNode.html" title="class in org.apache.hadoop.hdfs.server.diskbalancer.datamodel">DiskBalancerDataNode</a>&nbsp;that)</pre>
<div class="block">Compares this object with the specified object for order. Returns a
negative integer, zero, or a positive integer as this object is less than,
equal to, or greater than the specified object.</div>
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<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Comparable.html?is-external=true#compareTo-T-" title="class or interface in java.lang">compareTo</a></code>&nbsp;in interface&nbsp;<code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Comparable.html?is-external=true" title="class or interface in java.lang">Comparable</a>&lt;<a href="../../../../../../../org/apache/hadoop/hdfs/server/diskbalancer/datamodel/DiskBalancerDataNode.html" title="class in org.apache.hadoop.hdfs.server.diskbalancer.datamodel">DiskBalancerDataNode</a>&gt;</code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>that</code> - the object to be compared.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>a negative integer, zero, or a positive integer as this object is
less than, equal to, or greater than the specified object.</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/NullPointerException.html?is-external=true" title="class or interface in java.lang">NullPointerException</a></code> - if the specified object is null</dd>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/ClassCastException.html?is-external=true" title="class or interface in java.lang">ClassCastException</a></code> - if the specified object's type prevents it
from being compared to this object.</dd>
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<pre>public&nbsp;int&nbsp;hashCode()</pre>
<div class="block">Returns a hash code value for the object. This method is supported for the
benefit of hash tables such as those provided by <a href="https://docs.oracle.com/javase/8/docs/api/java/util/HashMap.html?is-external=true" title="class or interface in java.util"><code>HashMap</code></a>.</div>
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<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code><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></code>&nbsp;in class&nbsp;<code><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></code></dd>
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<pre>public&nbsp;double&nbsp;getNodeDataDensity()</pre>
<div class="block">Returns NodeDataDensity Metric.</div>
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<dt><span class="returnLabel">Returns:</span></dt>
<dd>float</dd>
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<pre>public&nbsp;void&nbsp;computeNodeDensity()</pre>
<div class="block">Computes nodes data density.
This metric allows us to compare different nodes and how well the data is
spread across a set of volumes inside the node.</div>
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<pre>public&nbsp;boolean&nbsp;isBalancingNeeded(double&nbsp;threshold)</pre>
<div class="block">Computes if this node needs balancing at all.</div>
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<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>threshold</code> - - Percentage</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>true or false</dd>
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<pre>public&nbsp;void&nbsp;addVolume(<a href="../../../../../../../org/apache/hadoop/hdfs/server/diskbalancer/datamodel/DiskBalancerVolume.html" title="class in org.apache.hadoop.hdfs.server.diskbalancer.datamodel">DiskBalancerVolume</a>&nbsp;volume)
throws <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></pre>
<div class="block">Adds a volume to the DataNode.
It is assumed that we have one thread per node hence this call is not
synchronised neither is the map is protected.</div>
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<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>volume</code> - - volume</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></code></dd>
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<pre>public&nbsp;int&nbsp;getVolumeCount()</pre>
<div class="block">Returns how many volumes are in the DataNode.</div>
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<dt><span class="returnLabel">Returns:</span></dt>
<dd>int</dd>
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