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1<html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>vfs_commit</title><link rel="stylesheet" href="samba.css" type="text/css"><meta name="generator" content="DocBook XSL Stylesheets V1.68.1"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="refentry" lang="en"><a name="vfs_commit.8"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>vfs_commit &#8212; flush dirty data at specified intervals</p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><div class="cmdsynopsis"><p><code class="command">vfs objects = commit</code> </p></div></div><div class="refsect1" lang="en"><a name="id263118"></a><h2>DESCRIPTION</h2><p>This VFS module is part of the
2        <a href="samba.7.html"><span class="citerefentry"><span class="refentrytitle">samba</span>(7)</span></a> suite.</p><p>The <span><strong class="command">vfs_commit</strong></span> VFS module keeps track of
3        the amount of data written to a file and synchronizes it to
4        disk when a specified amount accumulates.
5        </p><p><span><strong class="command">vfs_commit</strong></span> is useful in two
6        circumstances. First, if you have very precious data, the
7        impact of unexpected power loss can be minimized by a small
8        commit:dthresh value. Secondly, write performance can be
9        improved on some systems by flushing file data early and at
10        regular intervals.</p><p>This module is stackable.</p></div><div class="refsect1" lang="en"><a name="id231130"></a><h2>OPTIONS</h2><div class="variablelist"><dl><dt><span class="term">commit:dthresh = BYTES</span></dt><dd><p>Synchronize file data each time the specified
11                number of bytes has been written.
12                </p><p>The following suffixes may be applied to BYTES:</p><div class="itemizedlist"><ul type="disc"><li><p><span><strong class="command">K</strong></span> - BYTES is a number of kilobytes</p></li><li><p><span><strong class="command">M</strong></span> - BYTES is a number of megabytes</p></li><li><p><span><strong class="command">G</strong></span> - BYTES is a number of gigabytes</p></li></ul></div></dd></dl></div></div><div class="refsect1" lang="en"><a name="id231187"></a><h2>EXAMPLES</h2><p>Synchronize the file data on the [precious] share after
13        every 512 kilobytes (524288 bytes) of data is written:</p><pre class="programlisting">
14        <em class="parameter"><code>[precious]</code></em>
15        <a class="indexterm" name="id231406"></a>path = /data/precious
16        <a class="indexterm" name="id231413"></a>vfs objects = commit
17        <a class="indexterm" name="id231420"></a>commit:dthresh = 512K
18</pre></div><div class="refsect1" lang="en"><a name="id231429"></a><h2>CAVEATS</h2><p>On some systems, the data synchronization performed by
19        <span><strong class="command">commit</strong></span> may reduce performance.
20        </p></div><div class="refsect1" lang="en"><a name="id231445"></a><h2>VERSION</h2><p>This man page is correct for version 3.0.25 of the Samba suite.
21        </p></div><div class="refsect1" lang="en"><a name="id231455"></a><h2>AUTHOR</h2><p>The original Samba software and related utilities
22        were created by Andrew Tridgell. Samba is now developed
23        by the Samba Team as an Open Source project similar
24        to the way the Linux kernel is developed.</p></div></div></body></html>
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