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 messages
	      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 ver-
	      sions 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
       number.	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 protocol and address family combinations that are marked visible in the
       netconfig 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)