svn commit: samba-docs r1038 - in trunk/manpages-3: .

[jpeach at samba.org]

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>