lockd(1M)                                                         lockd(1M)




 NAME    [Toc]    [Back]
      lockd - network lock daemon

 SYNOPSIS    [Toc]    [Back]
      /usr/sbin/rpc.lockd [-l log_file] [-t timeout] [-g graceperiod]

 DESCRIPTION    [Toc]    [Back]
      lockd is an RPC server that processes NFS file locking requests from
      the local kernel or from another remote lock daemon.  lockd forwards
      lock requests for remote data to the server site's lock daemon through
      the RPC/XDR package (see rpc(3N)).  lockd then requests the status
      monitor daemon, statd for monitor service (see statd(1M)).  The reply
      to the lock request is not sent to the kernel until the status daemon
      and the server site's lock daemon have replied.

      If either the status monitor or server site's lock daemon is
      unavailable, the reply to a lock request for remote data is delayed
      until all daemons become available.

      When a server recovers, it waits for a grace period for all NFS
      client-site lockds to submit reclaim requests.  Client-site lockds are
      notified by the statd of the server recovery, and promptly resubmit
      previously granted lock requests.  If a lockd fails to secure a
      previously granted lock at the server site, the lockd sends a SIGLOST
      to the process holding that lock.

    Options    [Toc]    [Back]
      lockd recognizes the following options and command-line arguments:

           -l log_file         Log any errors to the named log file
                               log_file.  Errors are not logged if the -l
                               option is not specified.

                               Information logged to the file includes date
                               and time of the error, host name, process ID
                               and name of the function generating the
                               error, and the error message.

           -t timeout          lockd uses timeout (seconds) as the interval
                               instead of the default value (10 seconds) to
                               retransmit a lock request to the remote
                               server.  Note that changing this value also
                               changes the value for grace period duration.

           -g graceperiod      lockd uses [1+(graceperiod/timeout)]xtimeout
                               (seconds) as the grace period duration
                               instead of the default value (5xtimeout
                               seconds).  If both -t and -g are specified,
                               the -t should appear first since the grace
                               period duration is dependent on the value of
                               timeout.



 Hewlett-Packard Company            - 1 -   HP-UX 11i Version 2: August 2003






 lockd(1M)                                                         lockd(1M)




 AUTHOR    [Toc]    [Back]
      lockd was developed by Sun Microsystems, Inc., and HP.

 SEE ALSO    [Toc]    [Back]
      fcntl(2), lockf(2), signal(2), statd(1M).


 Hewlett-Packard Company            - 2 -   HP-UX 11i Version 2: August 2003