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<h2 title="Class PurgeTxnLog" class="title">Class PurgeTxnLog</h2>
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<pre>@InterfaceAudience.Public
public class <span class="typeNameLabel">PurgeTxnLog</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></pre>
<div class="block">this class is used to clean up the
snapshot and data log dir's. This is usually
run as a cronjob on the zookeeper server machine.
Invocation of this class will clean up the datalogdir
files and snapdir files keeping the last "-n" snapshot files
and the corresponding logs.</div>
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../../org/apache/zookeeper/server/PurgeTxnLog.html#PurgeTxnLog--">PurgeTxnLog</a></span>()</code> </td>
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<td class="colFirst"><code>static void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/zookeeper/server/PurgeTxnLog.html#main-java.lang.String:A-">main</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>[] args)</code> </td>
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<td class="colFirst"><code>static void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/zookeeper/server/PurgeTxnLog.html#purge-java.io.File-java.io.File-int-">purge</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/io/File.html?is-external=true" title="class or interface in java.io">File</a> dataDir,
<a href="https://docs.oracle.com/javase/8/docs/api/java/io/File.html?is-external=true" title="class or interface in java.io">File</a> snapDir,
int num)</code>
<div class="block">Purges the snapshot and logs keeping the last num snapshots and the
corresponding logs.</div>
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<pre>public PurgeTxnLog()</pre>
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<h4>purge</h4>
<pre>public static void purge(<a href="https://docs.oracle.com/javase/8/docs/api/java/io/File.html?is-external=true" title="class or interface in java.io">File</a> dataDir,
<a href="https://docs.oracle.com/javase/8/docs/api/java/io/File.html?is-external=true" title="class or interface in java.io">File</a> snapDir,
int num)
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">Purges the snapshot and logs keeping the last num snapshots and the
corresponding logs. If logs are rolling or a new snapshot is created
during this process, these newest N snapshots or any data logs will be
excluded from current purging cycle.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>dataDir</code> - the dir that has the logs</dd>
<dd><code>snapDir</code> - the dir that has the snapshots</dd>
<dd><code>num</code> - the number of snapshots to keep</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 static void main(<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>[] args)
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>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>args</code> - dataLogDir [snapDir] -n count
dataLogDir -- path to the txn log directory
snapDir -- path to the snapshot directory
count -- the number of old snaps/logs you want to keep, value should be greater than or equal to 3<br></dd>
<dt><span class="throwsLabel">Throws:</span></dt>
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