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108 lines
2.9 KiB
XML
108 lines
2.9 KiB
XML
<?xml version="1.0" encoding="iso-8859-1"?>
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<!DOCTYPE refentry PUBLIC "-//Samba-Team//DTD DocBook V4.2-Based Variant V1.0//EN" "http://www.samba.org/samba/DTD/samba-doc">
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<refentry id="vfs_prealloc.8">
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<refmeta>
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<refentrytitle>vfs_prealloc</refentrytitle>
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<manvolnum>8</manvolnum>
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<refmiscinfo class="source">Samba</refmiscinfo>
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<refmiscinfo class="manual">System Administration tools</refmiscinfo>
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<refmiscinfo class="version">3.5</refmiscinfo>
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</refmeta>
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<refnamediv>
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<refname>vfs_prealloc</refname>
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<refpurpose>preallocate matching files to a predetermined size</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<cmdsynopsis>
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<command>vfs objects = prealloc</command>
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</cmdsynopsis>
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</refsynopsisdiv>
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<refsect1>
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<title>DESCRIPTION</title>
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<para>This VFS module is part of the
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<citerefentry><refentrytitle>samba</refentrytitle>
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<manvolnum>7</manvolnum></citerefentry> suite.</para>
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<para>The <command>vfs_prealloc</command> VFS module preallocates
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files to a specified size each time a new file is created. This
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is useful in environments where files are of a predetermined
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size will be written to a disk subsystem where extending file
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allocations is expensive. </para>
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<para>This module is stackable.</para>
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</refsect1>
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<refsect1>
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<title>OPTIONS</title>
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<variablelist>
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<varlistentry>
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<term>prealloc:EXT = BYTES</term>
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<listitem>
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<para>Preallocate all files with the extension EXT to
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the size specified by BYTES.
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</para>
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<para>The following suffixes may be applied to BYTES:</para>
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<itemizedlist>
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<listitem><para><command>K</command> - BYTES is a number of kilobytes</para></listitem>
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<listitem><para><command>M</command> - BYTES is a number of megabytes</para></listitem>
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<listitem><para><command>G</command> - BYTES is a number of gigabytes</para></listitem>
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</itemizedlist>
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</listitem>
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</varlistentry>
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</variablelist>
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</refsect1>
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<refsect1>
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<title>EXAMPLES</title>
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<para>A process writes TIFF files to a Samba share, and the
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is known these files will almost always be around 4 megabytes
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(4194304 bytes): </para>
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<programlisting>
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<smbconfsection name="[frames]"/>
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<smbconfoption name="path">/data/frames</smbconfoption>
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<smbconfoption name="vfs objects">prealloc</smbconfoption>
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<smbconfoption name="prealloc:tiff">4M</smbconfoption>
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</programlisting>
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</refsect1>
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<refsect1>
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<title>CAVEATS</title>
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<para><command>vfs_prealloc</command> is not supported on all
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platforms and filesystems. Currently only XFS filesystems on
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Linux and IRIX are supported.
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</para>
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</refsect1>
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<refsect1>
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<title>VERSION</title>
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<para>This man page is correct for version 3.0.25 of the Samba suite.
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</para>
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</refsect1>
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<refsect1>
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<title>AUTHOR</title>
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<para>The original Samba software and related utilities
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were created by Andrew Tridgell. Samba is now developed
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by the Samba Team as an Open Source project similar
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to the way the Linux kernel is developed.</para>
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</refsect1>
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</refentry>
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