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.\" 4. Neither the name of the University nor the names of its contributors 13.\" may be used to endorse or promote products derived from this software 14.\" without specific prior written permission. 15.\" 16.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 17.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 20.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26.\" SUCH DAMAGE. 27.\" 28.\" From: @(#)nfsiod.8 8.2 (Berkeley) 2/22/94 29.\" $FreeBSD$ 30.\" 31.Dd September 22, 1994 32.Dt NFSIOD 8 33.Os 34.Sh NAME 35.Nm nfsiod 36.Nd local 37.Tn NFS 38asynchronous I/O server 39.Sh SYNOPSIS 40.Nm 41.Op Fl n Ar num_servers 42.Sh DESCRIPTION 43The 44.Nm 45utility is a kernel process which runs on an 46.Tn NFS 47client machine to service asynchronous I/O requests to its server. 48It improves performance but is not required for correct operation. 49.Pp 50This program controls the maximum number of processes that the kernel runs. 51.Pp 52The options are as follows: 53.Bl -tag -width indent 54.It Fl n 55Specify how many servers are permitted to be started. 56.El 57.Pp 58A client should run enough daemons to handle its maximum 59level of concurrency, typically four to six. 60.Pp 61If 62.Nm 63detects that the running kernel does not include 64.Tn NFS 65support, it will attempt to load a loadable kernel module containing 66.Tn NFS 67code, using 68.Xr kldload 2 . 69If this fails, or no 70.Tn NFS 71KLD was available, 72.Nm 73exits with an error. 74.Sh EXIT STATUS 75.Ex -std 76.Sh SEE ALSO 77.Xr nfsstat 1 , 78.Xr kldload 2 , 79.Xr nfssvc 2 , 80.Xr mountd 8 , 81.Xr nfsd 8 , 82.Xr rpcbind 8 83.Sh HISTORY 84The 85.Nm 86utility first appeared in 87.Bx 4.4 . 88