Copyright (c) 1999-2006 Apple Computer, Inc. All rights reserved.

@APPLE_LICENSE_HEADER_START@

This file contains Original Code and/or Modifications of Original Code
as defined in and that are subject to the Apple Public Source License
Version 2.0 (the 'License'). You may not use this file except in
compliance with the License. Please obtain a copy of the License at
http://www.opensource.apple.com/apsl/ and read it before using this
file.

The Original Code and all software distributed under the License are
distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
Please see the License for the specific language governing rights and
limitations under the License.

@APPLE_LICENSE_HEADER_END@

Copyright (c) 1989, 1991, 1993
The Regents of the University of California. All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
3. All advertising materials mentioning features or use of this software
must display the following acknowledgement:
This product includes software developed by the University of
California, Berkeley and its contributors.
4. Neither the name of the University nor the names of its contributors
may be used to endorse or promote products derived from this software
without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
SUCH DAMAGE.

@(#)nfsiod.8 8.2 (Berkeley) 2/22/94

.Dd October 25, 2006 .Dt NFSIOD 8 .Os .Sh NAME .Nm nfsiod .Nd local .Tn NFS asynchronous I/O .Sh SYNOPSIS .Nm .Op Fl n Ar num_threads .Sh DESCRIPTION .Nm is deprecated. See .Xr nfs.conf 5 for NFS configuration info.

p .Nm controls the maximum number of asynchronous I/O threads used for NFS mounts. Historically, it has consisted of a daemon that never exits. However, asynchronous I/O requests are now serviced by threads launched on demand in the kernel and the .Nm command simply sets the configuration limit.

p Having asynchronous I/O threads improves performance but is not required for correct operation.

p The options are as follows: l -tag -width Ds t Fl n Specify maximum number of asynchronous I/O threads to be used. .El

p If no maximum is specified, .Nm displays the current value. The default value is 16. A client should allow enough threads to handle its maximum level of concurrency.

p The .Nm utility exits 0 on success, and >0 if an error occurs. .Sh SEE ALSO .Xr nfs.conf 5 , .Xr mount_nfs 8 , .Xr nfsstat 1 .Sh HISTORY The .Nm nfsiod utility first appeared in 4.4BSD. It's use was deprecated in Darwin 9.