queuedefs - Queue description file for at, batch, and cron
commands
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: The name of the
queue. Defined queues are as follows: The default queue
for jobs started by at The default queue for jobs started
by batch The default queue for jobs run from a crontab
file
Queues d to z are also available for local use.
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. The nice(1) value to give to all
jobs in the queue that are not run with a user ID
of superuser. 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. The maximum number of
active jobs from all queues that may run at any one
time. The default is 25 jobs. 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.
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
Main cron directory The default location for the queue
description file.
Commands: at(1), cron(8), crontab(1), nice(1)
queuedefs(4)
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