серверный процесс NFS (NFS server process)
Имя (Name)
rpc.nfsd - NFS server process
Синопсис (Synopsis)
/usr/sbin/rpc.nfsd [options] nproc
Описание (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.
Параметры (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 major NFS versions 2,3,4 and the
minor versions 4.0, 4.1 and 4.2.
-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 --tcp
Instruct the kernel nfs server to open and listen on a TCP
socket. This is the default.
-T or --no-tcp
Instruct the kernel nfs server not to open and listen on a
TCP socket.
-u or --udp
Instruct the kernel nfs server to open and listen on a UDP
socket.
-U or --no-udp
Instruct the kernel nfs server not to open and listen on a
UDP socket. This is the default.
-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 major NFS versions 2,3,4 and the minor
versions 4.0, 4.1 and 4.2.
-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,
eight threads are 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 eight
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.
Конфигурационный файл (Config file)
Many of the options that can be set on the command line can also
be controlled through values set in the [nfsd] section of the
/etc/nfs.conf configuration file. Values recognized include:
threads
The number of threads to start.
host A host name, or comma separated list of host names, that
rpc.nfsd will listen on. Use of the --host option
replaces all host names listed here.
grace-time
The grace time, for both NFSv4 and NLM, in seconds.
lease-time
The lease time for NFSv4, in seconds.
port Set the port for TCP/UDP to bind to.
rdma Enable RDMA port (with "on" or "yes" etc) on the standard
port ("nfsrdma", port 20049).
rdma-port
Set an alternate RDMA port.
UDP Enable (with "on" or "yes" etc) or disable ("off", "no")
UDP support.
TCP Enable or disable TCP support.
vers2
vers3
vers4 Enable or disable a major NFS version. 3 and 4 are
normally enabled by default.
vers4.1
vers4.2
Setting these to "off" or similar will disable the
selected minor versions. Setting to "on" will enable
them. The default values are determined by the kernel,
and usually minor versions default to being enabled once
the implementation is sufficiently complete.
Примечание (Note)
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.
Смотри также (See also)
nfsd(7), rpc.mountd(8), exports(5), exportfs(8), nfs.conf(5),
rpc.rquotad(8), nfsstat(8), netconfig(5).
