nfsd(1M)                                                              nfsd(1M)



NAME
     nfsd, biod, bio3d - NFS daemons

SYNOPSIS
     /usr/etc/nfsd [ -a ] [ -p proto ] [ -c nconns ] [ nservers ]
     /usr/etc/biod [ nclients ]

DESCRIPTION
     nfsd starts the nfs(4) server daemons that handle client NFS requests.

     biod starts asynchronous block I/O daemons.  This command is used on a
     NFS client to perform buffer cache read-ahead and write-behind.

     bio3d processes are the asynchronous kernel processes for NFS version 3.
     No daemon is necessary to start bio3ds.  There is one bio3d associated
     with each mounted filesystem at mount time.  If the NFS traffic to a
     filesystem increases, up to three more bio3d processes are spawned for
     that filesystem.  When traffic subsides, these extra processes exit.

OPTIONS
     -a          Allow the NFS server daemon to service client requests over
                 both the UDP and TCP protocols.  This is the default.

     -p proto    Allow the NFS server daemon to service client requests over
                 either the UDP or the TCP protocols.  The -a option overrides
                 this selection.

     -c nconns   Set an upper limit on the number of simultaneous connections
                 the NFS server has open.  By default this number is
                 unlimited.  nconns can be equated with the total number of
                 clients mounting files from this server.

     nservers    This is the number of NFS server daemons to start.  This
                 number should be based on the load expected on this server,
                 as only one NFS request can be serviced by each daemon at a
                 given time.  Values in the range 4 to 16 are probably
                 adequate for lightly loaded servers.  Heavily loaded servers
                 may require far more.  Having too many daemons is wasteful of
                 system resources.  The default is 1.

     nclients    The number of asynchronous block I/O daemons.  A good number
                 for nclients is 4.  The default is 1.

     These daemons are started during system initialization from the
     /etc/init.d/network script if the configuration flag nfs is set on (see
     network(1M)).

FILES
     When a file that is opened by a client is unlinked (by the server), a
     file with a name of the form .nfsXXX (where XXX is a number) is created
     by the client.  When the open file is closed, the .nfsXXX file is
     removed.  If the client crashes before the file can be closed, the



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nfsd(1M)                                                              nfsd(1M)



     .nfsXXX file is not removed.

FILES
     .nfsXXX     client machine pointer to an open-but-unlinked file

SEE ALSO
     exportfs(1M), mountd(1M), network(1M), exports(4).
















































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