.\"
.\" nfsstat(8)
.\" 
.\" Copyright (C) 1996-2005 Olaf Kirch <okir@suse.de>
.TH nfsstat 8 "7 Aug 2007"
.SH NAME
nfsstat \- list NFS statistics
.SH SYNOPSIS
.B nfsstat
[\fIOPTION\fR]...
.SH DESCRIPTION
The
.B nfsstat
displays statistics kept about NFS client and server activity.
.SH OPTIONS
.TP
.B \-s, \-\-server
Print only server-side statistics. The default is to print both server and
client statistics.
.TP
.B \-c, \-\-client
Print only client-side statistics.
.TP
.B \-n, \-\-nfs
Print only NFS statistics. The default is to print both NFS and RPC
information.
.TP
.B \-2
Print only NFS v2 statistics. The default is to only print information
about the versions of \fBNFS\fR that have non-zero counts.
.TP
.B \-3
Print only NFS v3 statistics. The default is to only print information
about the versions of \fBNFS\fR that have non-zero counts.
.TP
.B \-4
Print only NFS v4 statistics. The default is to only print information
about the versions of \fBNFS\fR that have non-zero counts.
.TP
.B \-m, \-\-mounts
Print information about each of the mounted \fBNFS\fR file systems.

If this option is used, all other options are ignored.
.TP
.B \-r, \-\-rpc
Print only RPC statistics.
.TP
.BI \-o " facility
Display statistics for the specified facility, which must be one of:
.RS
.TP
.B nfs
NFS protocol information, split up by RPC call.
.TP
.B rpc
General RPC information.
.TP
.B net
Network layer statistics, such as the number of received packets, number
of TCP connections, etc.
.TP
.B fh
Usage information on the server's file handle cache, including the
total number of lookups, and the number of hits and misses.
.TP
.B rc
Usage information on the server's request reply cache, including the
total number of lookups, and the number of hits and misses.
.TP
.B io
Usage information on the server's io statistics; bytes read and
written.
.TP
.B ra
Usage information on the server's read ahead cache, including the
ra cache size, the depth of ra cache hits, and ra cache misses.
.TP
.B all
Display all of the above facilities.
.RE
.TP
.B \-v, \-\-verbose
This is equivalent to \fB\-o all\fR.
.TP
.B \-l, \-\-list
Print information in list form.
.TP
.BI "\-S, \-\-since " file
Instead of printing current statistics, 
.B nfsstat
imports statistics from
.I file
and displays the difference between those and the current statistics.
Valid input
.IR file "s may be in the form of "
.B /proc/net/rpc/nfs
(raw client stats),
.B /proc/net/rpc/nfsd
(raw server stats), or saved output from
.B nfsstat
itself (client and/or server stats).   Any statistics missing from a saved
.B nfsstat
output 
.I file
are treated as zeroes.
.TP
.B \-Z[interval], \-\-sleep=[interval]
Instead of printing current statistics and immediately exiting,
.B nfsstat
takes a snapshot of the current statistics and pauses until it receives
.B SIGINT
(typically from
.BR Ctrl-C ),
at which point it takes another snapshot and displays the difference
between the two.
If \fIinterval\fR is specified, 
.B nfsstat
will print the number of \fBNFS\fR calls made since the previous report.
Stats will be printed repeatedly every \fIinterval\fR seconds.
.\" --------------------- EXAMPLES -------------------------------
.SH EXAMPLES
.TP
.B nfsstat \-o all \-234
Show all information about all versions of \fBNFS\fR.
.TP
.B nfsstat \-\-verbose \-234
Same as above.
.TP
.B nfsstat \-o all
Show all information about active versions of \fBNFS\fR.
.TP
.B nfsstat \-\-nfs \-\-server \-3
Show statistics for \fBNFS\fR version 3 server.
.TP
.B nfsstat \-m
Show information about mounted \fBNFS\fR filesystems.
.\" --------------------- DISPLAY --------------------------------
.SH DISPLAY
The \fBFlags\fR output from the \fB\-m\fR option is the same as the
flags give to the \fBmount\fR command.
.\" --------------------- FILES ----------------------------------
.SH FILES
.TP
.B /proc/net/rpc/nfsd
.BR procfs -based
interface to kernel NFS server statistics.
.TP
.B /proc/net/rpc/nfs
.BR procfs -based
interface to kernel NFS client statistics.
.TP
.B /proc/mounts
.BR procfs -based
interface to the mounted filesystems.
.\" -------------------- SEE ALSO --------------------------------
.SH SEE ALSO
.BR rpc.nfsd (8).
.BR nfs (5).
.\" ---------------------- BUGS ----------------------------------
.SH BUGS
The default output has been changed.  To get the old default output you must run \fBnfsstat \-\-auto \-2\fR.
.P
The function of the \fB\-v\fR and \fB\-a\fR options have changed. The \fB\-a\fR option
is now reserved for future use. The \fB\-v\fR does what the \fB\-a\fR option used to do,
and the new \fB\-[234]\fR options replace the \fB\-v\fR option.
.P
The \fBDisplay\fR section should be more complete.
.P
Further bugs can be found or reported at 
.BR http://nfs.sf.net/ .
.\" -------------------- AUTHOR ----------------------------------
.SH AUTHOR
Olaf Kirch, <okir@suse.de>