1.\" Copyright (c) 1989, 1991, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 3. All advertising materials mentioning features or use of this software 13.\" must display the following acknowledgement: 14.\" This product includes software developed by the University of 15.\" California, Berkeley and its contributors. 16.\" 4. Neither the name of the University nor the names of its contributors 17.\" may be used to endorse or promote products derived from this software 18.\" without specific prior written permission. 19.\" 20.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30.\" SUCH DAMAGE. 31.\" 32.\" From: @(#)nfsiod.8 8.2 (Berkeley) 2/22/94 33.\" $FreeBSD: src/sbin/nfsiod/nfsiod.8,v 1.9.2.3 2003/02/23 20:50:43 trhodes Exp $ 34.\" $DragonFly: src/sbin/nfsiod/nfsiod.8,v 1.2 2003/06/17 04:27:34 dillon Exp $ 35.\" 36.Dd September 22, 1994 37.Dt NFSIOD 8 38.Os 39.Sh NAME 40.Nm nfsiod 41.Nd local 42.Tn NFS 43asynchronous I/O server 44.Sh SYNOPSIS 45.Nm 46.Op Fl n Ar num_servers 47.Sh DESCRIPTION 48.Nm Nfsiod 49runs on an 50.Tn NFS 51client machine to service asynchronous I/O requests to its server. 52It improves performance but is not required for correct operation. 53.Pp 54Unless otherwise specified, a single server is started. 55.Pp 56The options are as follows: 57.Bl -tag -width indent 58.It Fl n 59Specify how many servers are to be started. 60.El 61.Pp 62A client should run enough daemons to handle its maximum 63level of concurrency, typically four to six. 64.Pp 65If 66.Nm 67detects that the running kernel does not include 68.Tn NFS 69support, it will attempt to load a loadable kernel module containing 70.Tn NFS 71code, using 72.Xr kldload 8 73by way of 74.Xr vfsload 3 . 75If this fails, or no 76.Tn NFS 77KLD was available, 78The 79.Nm 80utility exits with an error. 81.Sh EXIT STATUS 82.Ex -std 83.Sh SEE ALSO 84.Xr nfsstat 1 , 85.Xr nfssvc 2 , 86.Xr kldload 8 , 87.Xr mountd 8 , 88.Xr nfsd 8 , 89.Xr rpcbind 8 90.Sh HISTORY 91The 92.Nm 93utility first appeared in 94.Bx 4.4 . 95