nfsd, biod, bio3d - NFS daemons
/usr/etc/nfsd [ -a ] [ -p proto ] [ -c nconns ] [ nservers ]
/usr/etc/biod [ nclients ]
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.
-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
-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. On an
Origin system, one nfsd server per CPU maximizes efficiency
and performance. Having too many daemons can be wasteful of
system resources. The default is the number of CPUs in the
system or 4, whichever is larger.
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
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
.nfsXXX file is not removed.
.nfsXXX client machine pointer to an open-but-unlinked file
exportfs(1M), mountd(1M), network(1M), exports(4).
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