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queuedefs(4)


NAME

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


DESCRIPTION

  The queuedefs file describes the characteristics of the queues managed by
  cron or specifies other characteristics for cron.  Each noncomment line in
  this file describes either one queue or a cron characteristic.  Each
  uncommented line should be in one of the following formats.

       q.[njobj][nicen][nwaitw]
       max_jobs=mjobs
       log=lcode

  The fields in these lines are as follows:

  q   The name of the queue.  Defined queues are as follows:

      a	  The default queue for jobs started by at

      b	  The default queue for jobs started by batch

      c	  The default queue for jobs run from a crontab file

	  Queues d to z are also available for local use.

  njob
      The maximum number of jobs that can be run simultaneously in the queue;
      if more than njob jobs are ready to run, only the first njob jobs will
      be run.  The others will be initiated as currently running jobs
      terminate.

  nice
      The nice(1) value to give to all jobs in the queue that are not run
      with a user ID of superuser.

  nwait
      The number of seconds to wait before rescheduling a job that was
      deferred because more than njob jobs were running in that queue, or
      because the system-wide limit of jobs executing (max_jobs) has been
      reached.

  mjobs
      The maximum number of active jobs from all queues that may run at any
      one time.	 The default is 25 jobs.

  lcode
      Logging level of messages sent to a log file. The default is 4.
      Defined levels are as follows:

      ___________________
      level-code   level
      ___________________
      0		   None
      1		   Low
      2		   Medium
      3		   High
      4		   Full
      ___________________

  Lines beginning with # are comments, and are ignored.


EXAMPLES

  The following	 file specifies that the b queue, for batch jobs, can have up
  to 50 jobs running simultaneously; that those jobs will be run with a nice
  value of 20.	If a job cannot be run because too many other jobs are
  running, cron will wait 60 seconds before trying again to run it.  All
  other queues can have up to 100 jobs running simultaneously;	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.

       b.50j20n60w

  The following file specifies that a total of 25 active jobs will be allowed
  by cron over all the queues at any one time, and cron will log all messages
  to the log file. The last two lines are comments that are ignored.

       max_jobs=25
       log=4
       # This is a comment
       # And so is this


FILES

  /var/adm/cron
      Main cron directory

  /var/adm/cron/queuedefs
      The default location for the queue description file.


SEE ALSO

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

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