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
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) delim off