101 lines
2.9 KiB
Groff
101 lines
2.9 KiB
Groff
.\" Copyright (c) 1989, 1991, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 4. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" From: @(#)nfsiod.8 8.2 (Berkeley) 2/22/94
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.\" $FreeBSD$
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.\"
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.Dd December 26, 2009
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.Dt NFSIOD 8
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.Os
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.Sh NAME
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.Nm nfsiod
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.Nd local
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.Tn NFS
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asynchronous I/O server
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.Sh SYNOPSIS
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.Nm
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.Op Fl n Ar num_servers
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.Sh DESCRIPTION
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The
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.Nm
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utility controls the maximum number of
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.Nm
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kernel processes which run on an
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.Tn NFS
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client machine to service asynchronous I/O requests to its server.
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Having
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.Nm
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kernel processes
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improves performance but is not required for correct operation.
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.Pp
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The option is as follows:
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.Bl -tag -width indent
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.It Fl n
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Specify how many processes are permitted to be started.
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.El
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.Pp
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Without an option,
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.Nm
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displays the current settings.
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A client should allow enough number of processes to handle its maximum
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level of concurrency, typically four to six.
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.Pp
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If
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.Nm
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detects that the running kernel does not include
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.Tn NFS
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support, it will attempt to load a kernel module containing
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.Tn NFS
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code, using
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.Xr kldload 2 .
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If this fails, or no
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.Tn NFS
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module was available,
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.Nm
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exits with an error.
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.Sh EXIT STATUS
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.Ex -std
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.Sh SEE ALSO
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.Xr nfsstat 1 ,
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.Xr kldload 2 ,
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.Xr nfssvc 2 ,
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.Xr mountd 8 ,
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.Xr nfsd 8 ,
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.Xr rpcbind 8
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.Sh HISTORY
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The
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.Nm
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utility first appeared in
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.Bx 4.4 .
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.Pp
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Starting with
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.Fx 5.0 ,
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the utility no longer starts daemons, but only serves as a vfs
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loader and
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.Xr sysctl 3
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wrapper.
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