lockd(1M)																 lockd(1M)

NAME

       lockd: rpc.lockd - network lock daemon

SYNOPSIS

       graceperiod] listen_min_backlog] timeout] [nthreads]

DESCRIPTION

       The  lockd  utility  is	part of the NFS lock manager, which supports record lock and share lock operations on NFS files.  See fcntl(2) and
       lockf(2).  provides two functions:

	      o  It forwards locking requests for NFS mounted file systems to the lockd on the NFS server.

	      o  It generates local file locking operations in response to requests forwarded from running on NFS client machines.

	      State information kept by the lockd about these locking requests can be lost if is killed or the operating system is rebooted.  Some
	      of  this	information  can  be recovered as follows.  When a server recovers, it waits for a grace period for all NFS client-site to
	      submit reclaim requests.	Client-site is notified by the of the server recovery, and  promptly  resubmits  previously  granted  lock
	      requests.  If a fails to secure a previously granted lock at the server site, then the sends a to the process holding that lock.

	      Administrators  can make changes to the startup parameters for by logging in as root and editing the file (see nfs(4)).  Administra-
	      tors can also make changes by using the command.

   Options
       recognizes the following options and command-line arguments:

	      Deprecated in favor of the
				parameter in the NFS default file, which is equivalent.  Specify the number of seconds that all clients (both  NLM
				and  NFSv4)  have  to reclaim locks after the server reboots.  This option also controls the NFSv4 lease interval.
				The default value is 90 seconds.

	      Specify the listener backlog,
				listen_min_backlog, which is the number of connect requests that are queued and waiting to be processed before new
				connect requests begin to get dropped.

	      Specify the number of seconds to wait before retransmitting a lock
				request  to  the  remote  server.  The default value is 5 seconds.  Equivalent to the parameter in the NFS default
				file.

	      nthreads		Specify the maximum number of concurrent threads that the server can handle.  This concurrency is achieved  by	up
				to  nthreads  threads  created	as  needed  in	the kernel.  nthreads should be based on the load expected on this
				server.  If nthreads is not specified, the maximum number of concurrent threads will default to 20.  Equivalent to
				the parameter in the NFS default file.

   Notes
       A directory service that provides service name data base support must have the following service entries in its database:

       Kernel Lock Manager logging can be enabled using By default, the variable is 0 which disables the Kernel Lock Manager logging feature.  The
       maximum value is 9.  The value determines how detailed the log messages are.

AUTHOR

       was developed by Sun Microsystems, Inc. and HP.

SEE ALSO

       clear_locks(1M), kctune(1M), setoncenv(1M), statd(1M),  fcntl(2),  lockf(2),  signal(2),  getservent(3N),  nfs(4),  nsswitch.conf(4),  ser-
       vices(4).

																	 lockd(1M)