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 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 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

       nfsd(7), 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)