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apache / hadoop-site / 952d547359cafef280f0a0324055741b2ed55be1 / . / content / docs / r3.3.1 / hadoop-project-dist / hadoop-hdfs / build / source / hadoop-hdfs-project / hadoop-hdfs / target / api / org / apache / hadoop / hdfs / server / diskbalancer / command / Command.html
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<div class="subTitle">org.apache.hadoop.hdfs.server.diskbalancer.command</div>
<h2 title="Class Command" class="title">Class Command</h2>
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<ul class="inheritance">
<li>org.apache.hadoop.conf.Configured</li>
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<li>org.apache.hadoop.hdfs.server.diskbalancer.command.Command</li>
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<dt>All Implemented Interfaces:</dt>
<dd><a href="https://docs.oracle.com/javase/8/docs/api/java/io/Closeable.html?is-external=true" title="class or interface in java.io">Closeable</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/AutoCloseable.html?is-external=true" title="class or interface in java.lang">AutoCloseable</a>, org.apache.hadoop.conf.Configurable</dd>
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<dt>Direct Known Subclasses:</dt>
<dd><a href="../../../../../../../org/apache/hadoop/hdfs/server/diskbalancer/command/CancelCommand.html" title="class in org.apache.hadoop.hdfs.server.diskbalancer.command">CancelCommand</a>, <a href="../../../../../../../org/apache/hadoop/hdfs/server/diskbalancer/command/ExecuteCommand.html" title="class in org.apache.hadoop.hdfs.server.diskbalancer.command">ExecuteCommand</a>, <a href="../../../../../../../org/apache/hadoop/hdfs/server/diskbalancer/command/HelpCommand.html" title="class in org.apache.hadoop.hdfs.server.diskbalancer.command">HelpCommand</a>, <a href="../../../../../../../org/apache/hadoop/hdfs/server/diskbalancer/command/PlanCommand.html" title="class in org.apache.hadoop.hdfs.server.diskbalancer.command">PlanCommand</a>, <a href="../../../../../../../org/apache/hadoop/hdfs/server/diskbalancer/command/QueryCommand.html" title="class in org.apache.hadoop.hdfs.server.diskbalancer.command">QueryCommand</a>, <a href="../../../../../../../org/apache/hadoop/hdfs/server/diskbalancer/command/ReportCommand.html" title="class in org.apache.hadoop.hdfs.server.diskbalancer.command">ReportCommand</a></dd>
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<pre>public abstract class <span class="typeNameLabel">Command</span>
extends org.apache.hadoop.conf.Configured
implements <a href="https://docs.oracle.com/javase/8/docs/api/java/io/Closeable.html?is-external=true" title="class or interface in java.io">Closeable</a></pre>
<div class="block">Common interface for command handling.</div>
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<th class="colOne" scope="col">Constructor and Description</th>
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hdfs/server/diskbalancer/command/Command.html#Command-org.apache.hadoop.conf.Configuration-">Command</a></span>(org.apache.hadoop.conf.Configuration&nbsp;conf)</code>
<div class="block">Constructs a command.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hdfs/server/diskbalancer/command/Command.html#Command-org.apache.hadoop.conf.Configuration-java.io.PrintStream-">Command</a></span>(org.apache.hadoop.conf.Configuration&nbsp;conf,
<a href="https://docs.oracle.com/javase/8/docs/api/java/io/PrintStream.html?is-external=true" title="class or interface in java.io">PrintStream</a>&nbsp;ps)</code>
<div class="block">Constructs a command.</div>
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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></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>protected void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hdfs/server/diskbalancer/command/Command.html#addValidCommandParameters-java.lang.String-java.lang.String-">addValidCommandParameters</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;key,
<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;desc)</code>
<div class="block">Adds valid params to the valid args table.</div>
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<tr id="i1" class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hdfs/server/diskbalancer/command/Command.html#close--">close</a></span>()</code>
<div class="block">Cleans any resources held by this command.</div>
</td>
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<tr id="i2" class="altColor">
<td class="colFirst"><code>protected org.apache.hadoop.fs.FSDataOutputStream</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hdfs/server/diskbalancer/command/Command.html#create-java.lang.String-">create</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;fileName)</code>
<div class="block">Returns a file created in the cluster.</div>
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<tr id="i3" class="rowColor">
<td class="colFirst"><code>abstract void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hdfs/server/diskbalancer/command/Command.html#execute-org.apache.commons.cli.CommandLine-">execute</a></span>(org.apache.commons.cli.CommandLine&nbsp;cmd)</code>
<div class="block">Executes the Client Calls.</div>
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<tr id="i4" class="altColor">
<td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/net/URI.html?is-external=true" title="class or interface in java.net">URI</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hdfs/server/diskbalancer/command/Command.html#getClusterURI--">getClusterURI</a></span>()</code>
<div class="block">Gets cluster URL.</div>
</td>
</tr>
<tr id="i5" class="rowColor">
<td class="colFirst"><code>org.apache.hadoop.hdfs.protocol.ClientDatanodeProtocol</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hdfs/server/diskbalancer/command/Command.html#getDataNodeProxy-java.lang.String-">getDataNodeProxy</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;datanode)</code>
<div class="block">Copied from DFSAdmin.java.</div>
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<tr id="i6" class="altColor">
<td class="colFirst"><code>protected int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hdfs/server/diskbalancer/command/Command.html#getDefaultTop--">getDefaultTop</a></span>()</code>
<div class="block">returns default top number of nodes.</div>
</td>
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<tr id="i7" class="rowColor">
<td class="colFirst"><code>protected <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;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hdfs/server/diskbalancer/command/Command.html#getNodeList-java.lang.String-">getNodeList</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;listArg)</code>
<div class="block">Gets the node set from a file or a string.</div>
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<tr id="i8" class="altColor">
<td class="colFirst"><code>protected <a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../../../../../org/apache/hadoop/hdfs/server/diskbalancer/datamodel/DiskBalancerDataNode.html" title="class in org.apache.hadoop.hdfs.server.diskbalancer.datamodel">DiskBalancerDataNode</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hdfs/server/diskbalancer/command/Command.html#getNodes-java.lang.String-">getNodes</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;listArg)</code>
<div class="block">Returns a DiskBalancer Node list from the Cluster or null if not found.</div>
</td>
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<tr id="i9" class="rowColor">
<td class="colFirst"><code>protected org.apache.hadoop.fs.Path</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hdfs/server/diskbalancer/command/Command.html#getOutputPath--">getOutputPath</a></span>()</code>
<div class="block">Returns the output path where the plan and snapshot gets written.</div>
</td>
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<tr id="i10" class="altColor">
<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hdfs/server/diskbalancer/command/Command.html#getTopNodes--">getTopNodes</a></span>()</code>
<div class="block">Get top number of nodes to be processed.</div>
</td>
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<tr id="i11" class="rowColor">
<td class="colFirst"><code>protected org.apache.hadoop.fs.FSDataInputStream</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hdfs/server/diskbalancer/command/Command.html#open-java.lang.String-">open</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;fileName)</code>
<div class="block">Returns a InputStream to read data.</div>
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<tr id="i12" class="altColor">
<td class="colFirst"><code>protected int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hdfs/server/diskbalancer/command/Command.html#parseTopNodes-org.apache.commons.cli.CommandLine-org.apache.commons.text.TextStringBuilder-">parseTopNodes</a></span>(org.apache.commons.cli.CommandLine&nbsp;cmd,
org.apache.commons.text.TextStringBuilder&nbsp;result)</code>
<div class="block">Parse top number of nodes to be processed.</div>
</td>
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<tr id="i13" class="rowColor">
<td class="colFirst"><code>protected void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hdfs/server/diskbalancer/command/Command.html#populatePathNames-org.apache.hadoop.hdfs.server.diskbalancer.datamodel.DiskBalancerDataNode-">populatePathNames</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;node)</code>
<div class="block">Reads the Physical path of the disks we are balancing.</div>
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<tr id="i14" class="altColor">
<td class="colFirst"><code>abstract void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hdfs/server/diskbalancer/command/Command.html#printHelp--">printHelp</a></span>()</code>
<div class="block">Gets extended help for this command.</div>
</td>
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<tr id="i15" class="rowColor">
<td class="colFirst"><code>protected <a href="../../../../../../../org/apache/hadoop/hdfs/server/diskbalancer/datamodel/DiskBalancerCluster.html" title="class in org.apache.hadoop.hdfs.server.diskbalancer.datamodel">DiskBalancerCluster</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hdfs/server/diskbalancer/command/Command.html#readClusterInfo-org.apache.commons.cli.CommandLine-">readClusterInfo</a></span>(org.apache.commons.cli.CommandLine&nbsp;cmd)</code>
<div class="block">Process the URI and return the cluster with nodes setup.</div>
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<tr id="i16" class="altColor">
<td class="colFirst"><code>protected void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hdfs/server/diskbalancer/command/Command.html#recordOutput-org.apache.commons.text.TextStringBuilder-java.lang.String-">recordOutput</a></span>(org.apache.commons.text.TextStringBuilder&nbsp;result,
<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;outputLine)</code>
<div class="block">Put output line to log and string buffer.</div>
</td>
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<tr id="i17" class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hdfs/server/diskbalancer/command/Command.html#setCluster-org.apache.hadoop.hdfs.server.diskbalancer.datamodel.DiskBalancerCluster-">setCluster</a></span>(<a href="../../../../../../../org/apache/hadoop/hdfs/server/diskbalancer/datamodel/DiskBalancerCluster.html" title="class in org.apache.hadoop.hdfs.server.diskbalancer.datamodel">DiskBalancerCluster</a>&nbsp;newCluster)</code>
<div class="block">Set DiskBalancer cluster</div>
</td>
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<tr id="i18" class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hdfs/server/diskbalancer/command/Command.html#setClusterURI-java.net.URI-">setClusterURI</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/net/URI.html?is-external=true" title="class or interface in java.net">URI</a>&nbsp;clusterURI)</code>
<div class="block">Set cluster URL.</div>
</td>
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<tr id="i19" class="rowColor">
<td class="colFirst"><code>protected void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hdfs/server/diskbalancer/command/Command.html#setNodesToProcess-org.apache.hadoop.hdfs.server.diskbalancer.datamodel.DiskBalancerDataNode-">setNodesToProcess</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;node)</code>
<div class="block">Sets the nodes to process.</div>
</td>
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<tr id="i20" class="altColor">
<td class="colFirst"><code>protected void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hdfs/server/diskbalancer/command/Command.html#setNodesToProcess-java.util.List-">setNodesToProcess</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/hdfs/server/diskbalancer/datamodel/DiskBalancerDataNode.html" title="class in org.apache.hadoop.hdfs.server.diskbalancer.datamodel">DiskBalancerDataNode</a>&gt;&nbsp;nodes)</code>
<div class="block">Sets the list of Nodes to process.</div>
</td>
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<tr id="i21" class="rowColor">
<td class="colFirst"><code>protected void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hdfs/server/diskbalancer/command/Command.html#setOutputPath-java.lang.String-">setOutputPath</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;path)</code>
<div class="block">Setup the outpath.</div>
</td>
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<tr id="i22" class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hdfs/server/diskbalancer/command/Command.html#setTopNodes-int-">setTopNodes</a></span>(int&nbsp;topNodes)</code>
<div class="block">Set top number of nodes to be processed.</div>
</td>
</tr>
<tr id="i23" class="rowColor">
<td class="colFirst"><code>protected void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hdfs/server/diskbalancer/command/Command.html#verifyCommandOptions-java.lang.String-org.apache.commons.cli.CommandLine-">verifyCommandOptions</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;commandName,
org.apache.commons.cli.CommandLine&nbsp;cmd)</code>
<div class="block">Verifies if the command line options are sane.</div>
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<h3>Methods inherited from class&nbsp;org.apache.hadoop.conf.Configured</h3>
<code>getConf, setConf</code></li>
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<h3>Methods inherited from class&nbsp;java.lang.<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></h3>
<code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#clone--" title="class or interface in java.lang">clone</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#equals-java.lang.Object-" title="class or interface in java.lang">equals</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#finalize--" title="class or interface in java.lang">finalize</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#getClass--" title="class or interface in java.lang">getClass</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#hashCode--" title="class or interface in java.lang">hashCode</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notify--" title="class or interface in java.lang">notify</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notifyAll--" title="class or interface in java.lang">notifyAll</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#toString--" title="class or interface in java.lang">toString</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait--" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-int-" title="class or interface in java.lang">wait</a></code></li>
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<pre>public&nbsp;Command(org.apache.hadoop.conf.Configuration&nbsp;conf)</pre>
<div class="block">Constructs a command.</div>
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<pre>public&nbsp;Command(org.apache.hadoop.conf.Configuration&nbsp;conf,
<a href="https://docs.oracle.com/javase/8/docs/api/java/io/PrintStream.html?is-external=true" title="class or interface in java.io">PrintStream</a>&nbsp;ps)</pre>
<div class="block">Constructs a command.</div>
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<pre>public&nbsp;void&nbsp;close()
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">Cleans any resources held by this command.
<p>
The main goal is to delete id file created in
<a href="../../../../../../../org/apache/hadoop/hdfs/server/balancer/package-summary.html"><code>.NameNodeConnector#checkAndMarkRunning</code></a>
, otherwise, it's not allowed to run multiple commands in a row.
</p></div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/Closeable.html?is-external=true#close--" title="class or interface in java.io">close</a></code>&nbsp;in interface&nbsp;<code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/Closeable.html?is-external=true" title="class or interface in java.io">Closeable</a></code></dd>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/AutoCloseable.html?is-external=true#close--" title="class or interface in java.lang">close</a></code>&nbsp;in interface&nbsp;<code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/AutoCloseable.html?is-external=true" title="class or interface in java.lang">AutoCloseable</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 abstract&nbsp;void&nbsp;execute(org.apache.commons.cli.CommandLine&nbsp;cmd)
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">Executes the Client Calls.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>cmd</code> - - CommandLine</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 abstract&nbsp;void&nbsp;printHelp()</pre>
<div class="block">Gets extended help for this command.</div>
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<pre>protected&nbsp;<a href="../../../../../../../org/apache/hadoop/hdfs/server/diskbalancer/datamodel/DiskBalancerCluster.html" title="class in org.apache.hadoop.hdfs.server.diskbalancer.datamodel">DiskBalancerCluster</a>&nbsp;readClusterInfo(org.apache.commons.cli.CommandLine&nbsp;cmd)
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">Process the URI and return the cluster with nodes setup. This is used in
all commands.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>cmd</code> - - CommandLine</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>DiskBalancerCluster</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>protected&nbsp;void&nbsp;setOutputPath(<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;path)
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">Setup the outpath.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>path</code> - - Path or null to use default path.</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>protected&nbsp;void&nbsp;setNodesToProcess(<a href="../../../../../../../org/apache/hadoop/hdfs/server/diskbalancer/datamodel/DiskBalancerDataNode.html" title="class in org.apache.hadoop.hdfs.server.diskbalancer.datamodel">DiskBalancerDataNode</a>&nbsp;node)</pre>
<div class="block">Sets the nodes to process.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>node</code> - - Node</dd>
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<pre>protected&nbsp;void&nbsp;setNodesToProcess(<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/hdfs/server/diskbalancer/datamodel/DiskBalancerDataNode.html" title="class in org.apache.hadoop.hdfs.server.diskbalancer.datamodel">DiskBalancerDataNode</a>&gt;&nbsp;nodes)</pre>
<div class="block">Sets the list of Nodes to process.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>nodes</code> - Nodes.</dd>
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<pre>protected&nbsp;<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;getNodeList(<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;listArg)
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">Gets the node set from a file or a string.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>listArg</code> - - String File URL or a comma separated list of node names.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>Set of node names</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>protected&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../../../../../org/apache/hadoop/hdfs/server/diskbalancer/datamodel/DiskBalancerDataNode.html" title="class in org.apache.hadoop.hdfs.server.diskbalancer.datamodel">DiskBalancerDataNode</a>&gt;&nbsp;getNodes(<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;listArg)
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">Returns a DiskBalancer Node list from the Cluster or null if not found.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>listArg</code> - String File URL or a comma separated list of node names.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>List of DiskBalancer Node</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>protected&nbsp;void&nbsp;verifyCommandOptions(<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;commandName,
org.apache.commons.cli.CommandLine&nbsp;cmd)</pre>
<div class="block">Verifies if the command line options are sane.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>commandName</code> - - Name of the command</dd>
<dd><code>cmd</code> - - Parsed Command Line</dd>
</dl>
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<pre>public&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/net/URI.html?is-external=true" title="class or interface in java.net">URI</a>&nbsp;getClusterURI()</pre>
<div class="block">Gets cluster URL.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>- URL</dd>
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<pre>public&nbsp;void&nbsp;setClusterURI(<a href="https://docs.oracle.com/javase/8/docs/api/java/net/URI.html?is-external=true" title="class or interface in java.net">URI</a>&nbsp;clusterURI)</pre>
<div class="block">Set cluster URL.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>clusterURI</code> - - URL</dd>
</dl>
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<pre>public&nbsp;org.apache.hadoop.hdfs.protocol.ClientDatanodeProtocol&nbsp;getDataNodeProxy(<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;datanode)
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">Copied from DFSAdmin.java. -- Creates a connection to dataNode.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>datanode</code> - - dataNode.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>ClientDataNodeProtocol</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>protected&nbsp;org.apache.hadoop.fs.FSDataOutputStream&nbsp;create(<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;fileName)
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">Returns a file created in the cluster.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>fileName</code> - - fileName to open.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>OutputStream.</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>protected&nbsp;org.apache.hadoop.fs.FSDataInputStream&nbsp;open(<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;fileName)
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">Returns a InputStream to read data.</div>
<dl>
<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>protected&nbsp;org.apache.hadoop.fs.Path&nbsp;getOutputPath()</pre>
<div class="block">Returns the output path where the plan and snapshot gets written.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>Path</dd>
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<pre>protected&nbsp;void&nbsp;addValidCommandParameters(<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;key,
<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;desc)</pre>
<div class="block">Adds valid params to the valid args table.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>key</code> - </dd>
<dd><code>desc</code> - </dd>
</dl>
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<pre>protected&nbsp;int&nbsp;getDefaultTop()</pre>
<div class="block">returns default top number of nodes.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>default top number of nodes.</dd>
</dl>
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<pre>protected&nbsp;void&nbsp;recordOutput(org.apache.commons.text.TextStringBuilder&nbsp;result,
<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;outputLine)</pre>
<div class="block">Put output line to log and string buffer.</div>
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<pre>protected&nbsp;int&nbsp;parseTopNodes(org.apache.commons.cli.CommandLine&nbsp;cmd,
org.apache.commons.text.TextStringBuilder&nbsp;result)
throws <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/IllegalArgumentException.html?is-external=true" title="class or interface in java.lang">IllegalArgumentException</a></pre>
<div class="block">Parse top number of nodes to be processed.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>top number of nodes to be processed.</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/IllegalArgumentException.html?is-external=true" title="class or interface in java.lang">IllegalArgumentException</a></code></dd>
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<pre>protected&nbsp;void&nbsp;populatePathNames(<a href="../../../../../../../org/apache/hadoop/hdfs/server/diskbalancer/datamodel/DiskBalancerDataNode.html" title="class in org.apache.hadoop.hdfs.server.diskbalancer.datamodel">DiskBalancerDataNode</a>&nbsp;node)
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">Reads the Physical path of the disks we are balancing. This is needed to
make the disk balancer human friendly and not used in balancing.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>node</code> - - Disk Balancer Node.</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;void&nbsp;setTopNodes(int&nbsp;topNodes)</pre>
<div class="block">Set top number of nodes to be processed.</div>
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<pre>public&nbsp;int&nbsp;getTopNodes()</pre>
<div class="block">Get top number of nodes to be processed.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>top number of nodes to be processed.</dd>
</dl>
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<h4>setCluster</h4>
<pre>public&nbsp;void&nbsp;setCluster(<a href="../../../../../../../org/apache/hadoop/hdfs/server/diskbalancer/datamodel/DiskBalancerCluster.html" title="class in org.apache.hadoop.hdfs.server.diskbalancer.datamodel">DiskBalancerCluster</a>&nbsp;newCluster)</pre>
<div class="block">Set DiskBalancer cluster</div>
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