nfsd

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 re-
              quests 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  re-
              leases  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  de-
              fault, 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 op-
              tion 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 of-
              ten 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
       nfsd(7), rpc.mountd(8), exports(5), exportfs(8),  rpc.rquotad(8),  nfs-
       stat(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)