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+.\" 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 February 22, 1994
+.Dt NFSIOD 8
+.Os
+.Sh NAME
+.Nm nfsiod
+.Nd local
+.Tn NFS
+asynchronous I/O server
+.Sh SYNOPSIS
+.Nm nfsiod
+.Op Fl n Ar num_servers
+.Sh DESCRIPTION
+.Nm Nfsiod
+runs on an
+.Tn NFS
+client machine to service asynchronous I/O requests to its server.
+It improves performance but is not required for correct operation.
+.Pp
+Unless otherwise specified, a single server is started.
+.Pp
+The options are as follows:
+.Bl -tag -width Ds
+.It Fl n
+Specify how many servers are to be started.
+.El
+.Pp
+A client should run enough daemons to handle its maximum
+level of concurrency, typically four to six.
+.Pp
+The
+.Nm nfsiod
+utility exits 0 on success, and >0 if an error occurs.
+.Sh SEE ALSO
+.Xr nfsstat 1 ,
+.Xr nfssvc 2 ,
+.Xr mountd 8 ,
+.Xr portmap 8
+.Sh HISTORY
+The
+.Nm nfsiod
+utility first appeared in 4.4BSD.