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diff --git a/docs/manpages/vfs_aio_fork.8 b/docs/manpages/vfs_aio_fork.8 new file mode 100644 index 0000000000..4b2a0b77db --- /dev/null +++ b/docs/manpages/vfs_aio_fork.8 @@ -0,0 +1,59 @@ +'\" t +.\" Title: vfs_aio_fork +.\" Author: [see the "AUTHOR" section] +.\" Generator: DocBook XSL Stylesheets v1.75.2 <http://docbook.sf.net/> +.\" Date: 01/22/2012 +.\" Manual: System Administration tools +.\" Source: Samba 3.6 +.\" Language: English +.\" +.TH "VFS_AIO_FORK" "8" "01/22/2012" "Samba 3\&.6" "System Administration tools" +.\" ----------------------------------------------------------------- +.\" * set default formatting +.\" ----------------------------------------------------------------- +.\" disable hyphenation +.nh +.\" disable justification (adjust text to left margin only) +.ad l +.\" ----------------------------------------------------------------- +.\" * MAIN CONTENT STARTS HERE * +.\" ----------------------------------------------------------------- +.SH "NAME" +vfs_aio_fork \- implement async I/O in Samba vfs +.SH "SYNOPSIS" +.HP \w'\ 'u +vfs objects = aio_fork +.SH "DESCRIPTION" +.PP +This VFS module is part of the +\fBsamba\fR(7) +suite\&. +.PP +The +aio_fork +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\&. +.PP +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\&. +.PP +This module is stackable\&. +.SH "EXAMPLES" +.PP +Straight forward use: +.sp +.if n \{\ +.RS 4 +.\} +.nf + \fI[cooldata]\fR + \m[blue]\fBpath = /data/ice\fR\m[] + \m[blue]\fBvfs objects = aio_fork\fR\m[] +.fi +.if n \{\ +.RE +.\} +.SH "VERSION" +.PP +This man page is correct for version 3\&.6\&.0 of the Samba suite\&. +.SH "AUTHOR" +.PP +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\&. |