mirror of
https://github.com/samba-team/samba.git
synced 2024-12-28 07:21:54 +03:00
8a44659c33
Signed-off-by: Karolin Seeger <kseeger@samba.org> Reviewed-by: Ralph Böhme <slow@samba.org>
100 lines
2.8 KiB
XML
100 lines
2.8 KiB
XML
<?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="vfs_syncops.8">
|
|
|
|
<refmeta>
|
|
<refentrytitle>vfs_syncops</refentrytitle>
|
|
<manvolnum>8</manvolnum>
|
|
<refmiscinfo class="source">Samba</refmiscinfo>
|
|
<refmiscinfo class="manual">System Administration tools</refmiscinfo>
|
|
<refmiscinfo class="version">4.6</refmiscinfo>
|
|
</refmeta>
|
|
|
|
|
|
<refnamediv>
|
|
<refname>vfs_syncops</refname>
|
|
<refpurpose>Ensure meta data operations are performed synchronously.</refpurpose>
|
|
</refnamediv>
|
|
|
|
<refsynopsisdiv>
|
|
<cmdsynopsis>
|
|
<command>vfs objects = syncops</command>
|
|
</cmdsynopsis>
|
|
</refsynopsisdiv>
|
|
|
|
<refsect1>
|
|
<title>DESCRIPTION</title>
|
|
|
|
<para>This VFS module is part of the
|
|
<citerefentry><refentrytitle>samba</refentrytitle>
|
|
<manvolnum>7</manvolnum></citerefentry> suite.</para>
|
|
|
|
<para>
|
|
Some filesystems (even some journaled filesystems) require that a
|
|
fsync() be performed on many meta data operations to ensure that the
|
|
operation is guaranteed to remain in the filesystem after a power
|
|
failure. This is particularly important for some cluster filesystems
|
|
which are participating in a node failover system with clustered
|
|
Samba. On those filesystems the <command>vfs_syncops</command> VFS module
|
|
provides a way to perform those operations safely.
|
|
</para>
|
|
|
|
<para>This module is stackable.</para>
|
|
|
|
</refsect1>
|
|
|
|
<refsect1>
|
|
<title>CONFIGURATION</title>
|
|
|
|
<para>
|
|
Most of the performance loss with the <command>vfs_syncops</command>
|
|
VFS module is in fsync on close(). You can disable that with
|
|
<command>syncops:onclose = no</command> that can be set either globally
|
|
or per share.
|
|
</para>
|
|
|
|
<para>
|
|
On certain filesystems that only require the last data written to be
|
|
fsync()'ed, you can disable the metadata synchronization of this module with
|
|
<command>syncops:onmeta = no</command>. This option can be set either
|
|
globally or per share.
|
|
</para>
|
|
|
|
<para>
|
|
The <command>vfs_syncops</command> VFS module can also be disabled
|
|
completely for a share with <command>syncops:disable = true</command>.
|
|
</para>
|
|
</refsect1>
|
|
|
|
<refsect1>
|
|
<title>EXAMPLES</title>
|
|
|
|
<para>Add syncops functionality for [share]:</para>
|
|
<programlisting>
|
|
<smbconfsection name="[share]"/>
|
|
<smbconfoption name="path">/data/share</smbconfoption>
|
|
<smbconfoption name="vfs objects">syncops</smbconfoption>
|
|
<smbconfoption name="syncops:onclose">no</smbconfoption>
|
|
</programlisting>
|
|
|
|
</refsect1>
|
|
|
|
<refsect1>
|
|
<title>VERSION</title>
|
|
|
|
<para>This man page is correct for version 4.1.0 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>
|