vfs_prealloc.8.html [plain text]
<html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>vfs_prealloc</title><link rel="stylesheet" href="samba.css" type="text/css"><meta name="generator" content="DocBook XSL Stylesheets V1.71.0"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="refentry" lang="en"><a name="vfs_prealloc.8"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>vfs_prealloc — preallocate matching files to a predetermined size</p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><div class="cmdsynopsis"><p><code class="literal">vfs objects = prealloc</code></p></div></div><div class="refsect1" lang="en"><a name="id291819"></a><h2>DESCRIPTION</h2><p>This VFS module is part of the
<a href="samba.7.html"><span class="citerefentry"><span class="refentrytitle">samba</span>(7)</span></a> suite.</p><p>The <code class="literal">vfs_prealloc</code> VFS module preallocates
files to a specified size each time a new file is created. This
is useful in environments where files are of a predetermined
size will be written to a disk subsystem where extending file
allocations is expensive. </p><p>This module is stackable.</p></div><div class="refsect1" lang="en"><a name="id259323"></a><h2>OPTIONS</h2><div class="variablelist"><dl><dt><span class="term">prealloc:EXT = BYTES</span></dt><dd><p>Preallocate all files with the extension EXT to
the size specified by BYTES.
</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="id259594"></a><h2>EXAMPLES</h2><p>A process writes TIFF files to a Samba share, and the
is known these files will almost always be around 4 megabytes
(4194304 bytes): </p><pre class="programlisting">
<em class="parameter"><code>[frames]</code></em>
<a class="indexterm" name="id259364"></a>path = /data/frames
<a class="indexterm" name="id259371"></a>vfs objects = prealloc
<a class="indexterm" name="id259378"></a>prealloc:tiff = 4M
</pre></div><div class="refsect1" lang="en"><a name="id259387"></a><h2>CAVEATS</h2><p><code class="literal">vfs_prealloc</code> is not supported on all
platforms and filesystems. Currently only XFS filesystems on
Linux and IRIX are supported.
</p></div><div class="refsect1" lang="en"><a name="id259403"></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="id259413"></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>