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rpc.statd(8)							  rpc.statd(8)

NAME
       rpc.statd - NSM status monitor

SYNOPSIS
       rpc.statd  [-FNL]  [-d]	[-?]  [-n   name ] [-o	port ] [-p  port ] [-H
       prog ] [-V]

DESCRIPTION
       The rpc.statd server implements the NSM (Network	 Status	 Monitor)  RPC
       protocol.  This service is somewhat misnamed, since it doesn't actually
       provide active monitoring as one might suspect; instead, NSM implements
       a  reboot notification service. It is used by the NFS file locking ser‐
       vice, rpc.lockd, to implement lock recovery when the NFS server machine
       crashes and reboots.

   Operation
       For  each  NFS client or server machine to be monitored, rpc.statd cre‐
       ates a file in /var/lib/nfs/sm.	When starting, it  normally  runs  sm-
       notify  to iterate through these files and notify the peer rpc.statd on
       those machines.

OPTIONS
       -F     By default, rpc.statd forks and puts itself  in  the  background
	      when  started.  The  -F argument tells it to remain in the fore‐
	      ground. This option is mainly for debugging purposes.

       -d     By default, rpc.statd sends logging messages  via	 syslog(3)  to
	      system  log.  The -d argument forces it to log verbose output to
	      stderr instead. This option is mainly  for  debugging  purposes,
	      and may only be used in conjunction with the -F parameter.

       -n, --name name
	      specify  a  name	for rpc.statd to use as the local hostname. By
	      default, rpc.statd will call gethostname(2)  to  get  the	 local
	      hostname. Specifying a local hostname may be useful for machines
	      with more than one interfaces.

       -o, --outgoing-port port
	      specify a port for rpc.statd to send  outgoing  status  requests
	      from.   By default, rpc.statd will ask portmap(8) to assign it a
	      port number.  As of this writing, there is not a	standard  port
	      number  that  portmap  always  or usually assigns.  Specifying a
	      port may be useful when implementing a firewall.

       -p, --port port
	      specify  a  port	for  rpc.statd	to  listen  on.	  By  default,
	      rpc.statd will ask portmap(8) to assign it a port number.	 As of
	      this writing, there is not a standard port number	 that  portmap
	      always or usually assigns.  Specifying a port may be useful when
	      implementing a firewall.

       -P, --state-directory-path directory
	      specify a directory in which to place statd  state  information.
	      If  this	option is not specified the default of /var/lib/nfs is
	      used.

       -N     Causes statd to run in the notify-only  mode.  When  started  in
	      this  mode,  the	statd  program will check its state directory,
	      send notifications to any monitored nodes,  and  exit  once  the
	      notifications have been sent. This mode is used to enable Highly
	      Available NFS implementations (i.e. HA-NFS).  This mode is  dep‐
	      recated - sm-notify should be used directly instead.

       -L, --no-notify
	      Inhibits	the running of sm-notify.  If sm-notify is run by some
	      other script at boot time, there is no need for statd  to	 start
	      sm-notify	 itself.  This can be appropriate if starting of statd
	      needs to be delayed until it is actually need.   In  such	 cases
	      sm-notify should still be run at boot time.

       -H,  --ha-callout prog
	      Specify  a high availability callout program, which will receive
	      callouts for all client monitor  and  unmonitor  requests.  This
	      allows  rpc.statd to be used in a High Availability NFS (HA-NFS)
	      environment. The program will be	run  with  3  arguments:   The
	      first is either add-client or del-client depending on the reason
	      for the callout.	The second will be the	name  of  the  client.
	      The third will be the name of the server as known to the client.

       -?     Causes rpc.statd to print out command-line help and exit.

       -V     Causes rpc.statd to print out version information and exit.

TCP_WRAPPERS SUPPORT
       This  rpc.statd	version	 is  protected by the tcp_wrapper library. You
       have to give the clients access to rpc.statd if they should be  allowed
       to  use	it.  To allow connects from clients of the .bar.com domain you
       could use the following line in /etc/hosts.allow:

       statd: .bar.com

       You have to use the daemon name statd for the daemon name (even if  the
       binary has a different name).

       For  further  information  please  have	a  look	 at  the  tcpd(8)  and
       hosts_access(5) manual pages.

SIGNALS
       SIGUSR1 causes rpc.statd to re-read the notify list from disk and  send
       notifications  to  clients.  This  can be used in High Availability NFS
       (HA-NFS) environments to notify clients to reacquire  file  locks  upon
       takeover of an NFS export from another server.

FILES
       /var/lib/nfs/state
       /var/lib/nfs/sm/*
       /var/lib/nfs/sm.bak/*

SEE ALSO
       rpc.nfsd(8), portmap(8)

AUTHORS
       Jeff Uphoff <juphoff@users.sourceforge.net>
       Olaf Kirch <okir@monad.swb.de>
       H.J. Lu <hjl@gnu.org>
       Lon Hohberger <hohberger@missioncriticallinux.com>
       Paul Clements <paul.clements@steeleye.com>

				  31 Aug 2004			  rpc.statd(8)
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