lockd(NADM)                     19 June 1992                     lockd(NADM)


 Name

    lockd - network lock daemon

 Syntax

    /etc/lockd [ -t timeout ] [ -d debuglevel ] [ -g graceperiod ] [ -h hash-
    size ]
    [ -l k2utimeout ]

 Description

    lockd processes lock requests that are either sent locally by the kernel
    or remotely by another lock daemon.  lockd forwards lock requests for
    remote data to the server site's lock daemon through the RPC/XDR(NS)
    package.  lockd then requests the status monitor daemon, statd(NADM), for
    monitor service.  The reply to the lock request will not be 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 client site
    lock managers to submit reclaim requests.  On the other hand, client site
    lock managers are notified by the status monitor of the server's recovery
    and promptly resubmit previously granted lock requests.  If lockd fails
    to secure a previously granted lock at the server site, lockd sends a
    deadlock signal SIGUSR2 to a process.

 Options


    -t timeout     lockd will use timeout (seconds) as the interval instead
                   of the default value (5 seconds) to retransmit a lock
                   request to the remote server.

    -d debuglevel  lockd has extensive internal reporting capabilities.  A
                   level of 2 will report significant events.  A level of 4
                   will report internal state and all lock request traffic in
                   verbose form.

    -g graceperiod lockd will use graceperiod (seconds) as the grace period
                   duration instead of the default value (45 seconds).

    -h hashsize    lockd will use hashsize number of hash buckets internally
                   instead of the default value of 29.

    -l k2utimeout  lockd will use k2utimeout (seconds) as the interval
                   instead of the default value (2 seconds) to retransmit
                   kernel lock manager requests.  This is the timeout value
                   used for local lock requests.

 See also

    fcntl(S), lockf(S), signal(S), statd(NADM)