diff options
Diffstat (limited to 'docs-xml/manpages-3/vfs_aio_fork.8.xml')
| -rw-r--r-- | docs-xml/manpages-3/vfs_aio_fork.8.xml | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/docs-xml/manpages-3/vfs_aio_fork.8.xml b/docs-xml/manpages-3/vfs_aio_fork.8.xml new file mode 100644 index 0000000000..af69d9ab0d --- /dev/null +++ b/docs-xml/manpages-3/vfs_aio_fork.8.xml @@ -0,0 +1,86 @@ +<?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_aio_fork.8"> + +<refmeta> + <refentrytitle>vfs_aio_fork</refentrytitle> + <manvolnum>8</manvolnum> + <refmiscinfo class="source">Samba</refmiscinfo> + <refmiscinfo class="manual">System Administration tools</refmiscinfo> + <refmiscinfo class="version">3.6</refmiscinfo> +</refmeta> + + +<refnamediv> + <refname>vfs_aio_fork</refname> + <refpurpose>implement async I/O in Samba vfs</refpurpose> +</refnamediv> + +<refsynopsisdiv> + <cmdsynopsis> + <command>vfs objects = aio_fork</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>The <command>aio_fork</command> VFS module enables async + I/O for Samba on platforms where the system level Posix AIO + interface is insufficient. Posix AIO can suffer from severe + limitations. For example, on some Linux versions the + real-time signals that it uses are broken under heavy load. + Other systems only allow AIO when special kernel modules are + loaded or only allow a certain system-wide amount of async + requests being scheduled. Systems based on glibc (most Linux + systems) only allow a single outstanding request per file + descriptor. </para> + + <para>To work around all these limitations, the aio_fork module + was written. It uses forked helper processes instead of the + internal Posix AIO interface to create asynchronousity for + read and write calls. It has no parameters, it will create + helper processes when async requests come in as needed. Idle + helper processes will be removed every 30 seconds. + </para> + + <para>This module is stackable.</para> + +</refsect1> + + +<refsect1> + <title>EXAMPLES</title> + + <para>Straight forward use:</para> + +<programlisting> + <smbconfsection name="[cooldata]"/> + <smbconfoption name="path">/data/ice</smbconfoption> + <smbconfoption name="vfs objects">aio_fork</smbconfoption> +</programlisting> + +</refsect1> + +<refsect1> + <title>VERSION</title> + + <para>This man page is correct for version 3.6.0 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> |