queuedefs

 

---

 
 
 
 File Formats                                         queuedefs(4)
 
 
 


NAME
      queuedefs - queue description file for at, batch, and cron
 


SYNOPSIS
      /etc/cron.d/queuedefs
 


DESCRIPTION
      The queuedefs file  describes  the  characteristics  of  the
      queues  managed  by  cron(1M). Each non-comment line in this
      file describes one queue. The format of  the  lines  are  as
      follows:
 
           q.[njobj][nicen][nwaitw]
 
 
      The fields in this line are:
 
      q     The name of the queue. a is the default queue for jobs
            started  by  at(1);  b  is  the default queue for jobs
            started by batch (see at(1)); c is the  default  queue
            for jobs run from a crontab(1) file.
 
      njob  The maximum number of jobs that can be run  simultane-
            ously  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(1) value to give to all jobs  in  that  queue
            that  are  not  run with a user ID of super-user.  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  the  system-
            wide  limit  of  jobs executing has been reached.  The
            default value is 60.
 
      Lines beginning with # are comments, and are ignored.
 
 EXAMPLES
      Example 1: A sample file.
 
      #
      #
      a.4j1n
      b.2j2n90w
 
      This file specifies that the a queue, for at jobs, can  have
      up  to 4 jobs running simultaneously; those jobs will be run
      with a nice value of 1.  As no nwait value was given,  if  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(1) jobs, can have up to 2  jobs  run-
      ning  simultaneously;  those jobs will be run with a nice(1)
      value of 2.  If a job cannot be run because too  many  other
      jobs  are running, cron(1M) will wait 90 seconds before try-
      ing 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, and if a job cannot  be  run  because  too  many
      other jobs are running cron will wait 60 seconds before try-
      ing again to run it.
 


FILES
      /etc/cron.d/queuedefs
            queue description file for  at, batch, and  cron.
 


SEE ALSO
      at(1), crontab(1), nice(1), cron(1M)
 
 
 
 
 SunOS 5.8            Last change: 1 Mar 1994                    2
 
 
 

---