Author: jpeach Date: 2007-02-28 19:33:04 +0000 (Wed, 28 Feb 2007) New Revision: 1038
WebSVN: http://websvn.samba.org/cgi-bin/viewcvs.cgi?view=rev&root=samba-docs&rev=1038 Log: Document cacheprime VFS module. Added: trunk/manpages-3/smb-vfs-cacheprime.8.xml Changeset: Added: trunk/manpages-3/smb-vfs-cacheprime.8.xml =================================================================== --- trunk/manpages-3/smb-vfs-cacheprime.8.xml 2007-02-28 19:02:50 UTC (rev 1037) +++ trunk/manpages-3/smb-vfs-cacheprime.8.xml 2007-02-28 19:33:04 UTC (rev 1038) @@ -0,0 +1,107 @@ +<?xml version="1.0" encoding="iso-8859-1"?> +<!DOCTYPE refentry PUBLIC "-//Samba-Team//DTD DocBook V4.2-Based Variant V1.0//EN" "http://www.samba.org/samba/DTD/samba-doc";> +<refentry id="smb-vfs-cacheprime.8"> + +<refmeta> + <refentrytitle>smb-vfs-cacheprime</refentrytitle> + <manvolnum>8</manvolnum> +</refmeta> + + +<refnamediv> + <refname>cacheprime</refname> + <refpurpose>prime the kernel file data cache</refpurpose> +</refnamediv> + +<refsynopsisdiv> + <cmdsynopsis> + <command>vfs objects = cacheprime</command> + </cmdsynopsis> +</refsynopsisdiv> + +<refsect1> + <title>DESCRIPTION</title> + + <para>This module is part of the <citerefentry><refentrytitle>samba</refentrytitle> + <manvolnum>7</manvolnum></citerefentry> suite.</para> + + <para>The <command>cacheprime</command> VFS module reads chunks + of file data near the range requested by clients in order to + make sure the data is present in the kernel file data cache at + the time when it is actually requested by clients. </para> + + <para>The size of the disk read operations performed + by <command>cacheprime</command> is determined by the + cacheprime:rsize option. All disk read operations are aligned + on boundaries that are a multiple of this size. Each range of + the file data is primed at most once during the time the client + has the file open. </para> + + <para>This module is stackable.</para> +</refsect1> + +<refsect1> + <title>OPTIONS</title> + + <variablelist> + + <varlistentry> + <term>cacheprime:rsize = BYTES</term> + <listitem> + <para>The number of bytes with which to prime + the kernel data cache. + + The following suffixes may be applied to BYTES:</para> + <itemizedlist> + <listitem><para><command>K</command> - BYTES is a number of kilobytes</para></listitem> + <listitem><para><command>M</command> - BYTES is a number of megabytes</para></listitem> + <listitem><para><command>G</command> - BYTES is a number of gigabytes</para></listitem> + </itemizedlist> + + </listitem> + </varlistentry> + + </variablelist> +</refsect1> + +<refsect1> + <title>EXAMPLES</title> + + <para>For a hypothetical disk array, it is necessary to ensure + that all read operations are of size 1 megabyte (1048576 bytes), + and aligned on 1 megabyte boundaries: + </para> +<programlisting> + <smbconfsection name="[hypothetical]"/> + <smbconfoption name="vfs objects">cacheprime</smbconfoption> + <smbconfoption name="cacheprime:rsize">1M</smbconfoption> +</programlisting> + +</refsect1> + +<refsect1> + <title>CAVEATS</title> + <para><command>cacheprime</command> is not a a substitute for + a general-purpose readahead mechanism. It is intended for use + only in very specific environments where disk operations must + be aligned and sized to known values (as much as that is possible). + </para> +</refsect1> + +<refsect1> + <title>VERSION</title> + <para>This man page is correct for version 3.0.25 of the Samba suite. + </para> +</refsect1> + +<refsect1> + <title>AUTHOR</title> + + <para>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.</para> + +</refsect1> + +</refentry>
