~zulcss/samba/server-dailies-3.4

<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 V1.74.0"></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 — flush dirty data at specified intervals</p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><div class="cmdsynopsis"><p><code class="literal">vfs objects = commit</code></p></div></div><div class="refsect1" lang="en"><a name="id2522915"></a><h2>DESCRIPTION</h2><p>This VFS module is part of the

<a class="citerefentry" href="samba.7.html"><span class="citerefentry"><span class="refentrytitle">samba</span>(7)</span></a> suite.</p><p>The <code class="literal">vfs_commit</code> VFS module keeps track of

the amount of data written to a file and synchronizes it to

disk when a specified amount accumulates.

</p><p><code class="literal">vfs_commit</code> is useful in two

circumstances. First, if you have very precious data, the

impact of unexpected power loss can be minimized by a small

commit:dthresh value. Secondly, write performance can be

improved on some systems by flushing file data early and at

regular intervals.</p><p>This module is stackable.</p></div><div class="refsect1" lang="en"><a name="id2483330"></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

number of bytes has been written.

</p><p>The following suffixes may be applied to BYTES:</p><div class="itemizedlist"><ul type="disc"><li><p><code class="literal">K</code> - BYTES is a number of kilobytes</p></li><li><p><code class="literal">M</code> - BYTES is a number of megabytes</p></li><li><p><code class="literal">G</code> - BYTES is a number of gigabytes</p></li></ul></div></dd></dl></div></div><div class="refsect1" lang="en"><a name="id2483389"></a><h2>EXAMPLES</h2><p>Synchronize the file data on the [precious] share after

every 512 kilobytes (524288 bytes) of data is written:</p><pre class="programlisting">

<em class="parameter"><code>[precious]</code></em>

<a class="link" href="smb.conf.5.html#PATH" target="_top">path = /data/precious</a>

<a class="link" href="smb.conf.5.html#VFSOBJECTS" target="_top">vfs objects = commit</a>

<a class="link" href="smb.conf.5.html#COMMIT:DTHRESH" target="_top">commit:dthresh = 512K</a>

</pre></div><div class="refsect1" lang="en"><a name="id2483668"></a><h2>CAVEATS</h2><p>On some systems, the data synchronization performed by

<code class="literal">commit</code> may reduce performance.

</p></div><div class="refsect1" lang="en"><a name="id2483684"></a><h2>VERSION</h2><p>This man page is correct for version 3.0.25 of the Samba suite.

</p></div><div class="refsect1" lang="en"><a name="id2483695"></a><h2>AUTHOR</h2><p>The original Samba software and related utilities

were created by Andrew Tridgell. Samba is now developed

by the Samba Team as an Open Source project similar

to the way the Linux kernel is developed.</p></div></div></body></html>