Manual Pages for UNIX Operating System command usage for man 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  simul-
              taneously 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.

       #



SunOS 5.11           Last change: 1 Mar 1994                    1






File Formats                                         queuedefs(4)



       #
       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 5.11           Last change: 1 Mar 1994                    2