rpc.nfsd(8)		    System Manager's Manual		   rpc.nfsd(8)



NAME
       rpc.nfsd - NFS server process

SYNOPSIS
       /usr/sbin/rpc.nfsd [options] nproc

DESCRIPTION
       The rpc.nfsd program implements the user level part of the NFS service.
       The main functionality is handled by the nfsd kernel module.  The  user
       space  program merely specifies what sort of sockets the kernel service
       should listen on, what NFS versions it should  support,	and  how  many
       kernel threads it should use.

       The  rpc.mountd	server provides an ancillary service needed to satisfy
       mount requests by NFS clients.

OPTIONS
       -d  or  --debug
	      enable logging of debugging messages

       -H  or  --host hostname
	      specify a particular hostname (or	 address)  that	 NFS  requests
	      will  be	accepted  on.  By  default,  rpc.nfsd  will accept NFS
	      requests on all known network addresses.	Note that lockd (which
	      performs file locking services for NFS) may still accept request
	      on all known network  addresses.	 This  may  change  in	future
	      releases	of  the Linux Kernel. This option can be used multiple
	      time to listen to more than one interface.

       -p  or  --port port
	      specify a different port to  listen  on  for  NFS	 requests.  By
	      default, rpc.nfsd will listen on port 2049.

       -r  or  --rdma
	      specify  that NFS requests on the standard RDMA port ("nfsrdma",
	      port 20049) should be honored.

       --rdma=port
	      Listen for RDMA requests on an alternate port - may be a	number
	      or a name listed in /etc/services.

       -N  or  --no-nfs-version vers
	      This  option can be used to request that rpc.nfsd does not offer
	      certain versions of NFS. The current  version  of	 rpc.nfsd  can
	      support NFS versions 2,3,4 and the newer version 4.1.

       -s  or  --syslog
	      By default, rpc.nfsd logs error messages (and debug messages, if
	      enabled) to stderr. This option makes rpc.nfsd  log  these  mes-
	      sages  to	 syslog	 instead.  Note that errors encountered during
	      option processing will still be logged to stderr	regardless  of
	      this option.

       -T  or  --no-tcp
	      Disable rpc.nfsd from accepting TCP connections from clients.

       -U  or  --no-udp
	      Disable rpc.nfsd from accepting UDP connections from clients.

       -V  or  --nfs-version vers
	      This  option  can be used to request that rpc.nfsd offer certain
	      versions of NFS. The current version of rpc.nfsd can support NFS
	      versions 2,3,4 and the newer version 4.1.

       -L  or  --lease-time seconds
	      Set  the	lease-time  used  for  NFSv4.  This corresponds to how
	      often clients need to confirm their state with the server. Valid
	      range is from 10 to 3600 seconds.

       -G  or  --grace-time seconds
	      Set the grace-time used for NFSv4 and NLM (for NFSv2 and NFSv3).
	      New file open requests (NFSv4) and new file locks (NLM) will not
	      be  allowed until after this time has passed to allow clients to
	      recover state.

       nproc  specify the number of NFS server threads. By default,  just  one
	      thread  is  started.  However,  for  optimum performance several
	      threads should be used. The actual figure depends on the	number
	      of  and  the  work load created by the NFS clients, but a useful
	      starting point is 8 threads. Effects of  modifying  that	number
	      can be checked using the nfsstat(8) program.

       Note  that  if  the NFS server is already running, then the options for
       specifying host, port, and protocol will be  ignored.   The  number  of
       processes  given	 will be the only option considered, and the number of
       active nfsd processes will be increased or decreased to match this num-
       ber.  In particular rpc.nfsd 0 will stop all threads and thus close any
       open connections.


NOTES
       If the program is built with TI-RPC support, it will enable any	proto-
       col and address family combinations that are marked visible in the net-
       config database.


SEE ALSO
       rpc.mountd(8),  exports(5),  exportfs(8),  rpc.rquotad(8),  nfsstat(8),
       netconfig(5).

AUTHOR
       Olaf  Kirch,  Bill  Hawes, H. J. Lu, G. Allan Morris III, and a host of
       others.



				  20 Feb 2014			   rpc.nfsd(8)