queuedefs(4)                        CLIX                        queuedefs(4)



  NAME

    queuedefs - Queue description file for at, batch, and cron

  DESCRIPTION

    The /usr/spool/cron/queuedefs file describes the characteristics of the
    queues managed by the cron command.  Each non-comment line in this file
    describes one queue.  The format of the lines are as follows:

    q.[njob j][nice n][nwait w]

    The fields in this line are as follows:

    q       The name of the queue.  The following queue names can be used.

            a - the default queue for jobs started by the at command.

            b - the default queue for jobs started by the batch command (see
            at(1)).

            c - the default queue for jobs run from a crontab file.

            d - z - user queues.

    njob    The maximum number of jobs that can be run simultaneously in that
            queue.  If more than njob jobs are ready to run, only the first
            njob jobs will be run, and the others will be run as jobs that are
            currently running terminate.  The default value is 100.

    nice    The nice value to give to all jobs in that queue that are not run
            with a user ID of superuser.  The default value is 2.
    nwait   The number of seconds to wait before rescheduling a job that was
            deferred because more than njob jobs were running in that job's
            queue, or because more than 25 jobs were running in all the
            queues.  The default value is 60.

    Lines beginning with # are comments, and are ignored.

  EXAMPLE

    The following is an example of a queuedefs file:

    #
    # @(#)queuedefs.5 1.7 90/02/15 SMI; from S5R3
    #
    a.4j1n
    b.2j2n90w

    This file specifies that the a queue, for at jobs, can have up to four
    jobs running simultaneously, and those jobs will be run with a nice value



  2/94 - Intergraph Corporation                                              1

  queuedefs(4)                        CLIX                        queuedefs(4)



    of 1.  If no nwait value is given, and a job cannot be run because too
    many other jobs are running, cron will wait 60 seconds before trying again
    to run it.  The b queue, for batch jobs, can have up to two jobs running
    simultaneously, and those jobs will be run with a nice value of 2.  If a
    job cannot be run because too many other jobs are running, cron will wait
    90 seconds before trying again to run it.

    All other queues can have up to 100 jobs running simultaneously and they
    will be run with a nice value of 2; if a job cannot be run because too
    many other jobs are running, cron will wait 60 seconds before trying again
    to run it.  If no values are defined for a queue in the queuedefs file,
    all jobs submitted to that queue will run with the following default
    values:

    100j2n60w


  RELATED INFORMATION

    Commands:  at(1), nice(1), crontab(1), cron(8)


































  2                                              Intergraph Corporation - 2/94