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.TH QUEUEDEFS 4
.SH NAME
queuedefs \- at/batch/cron queue description file
.SH SYNOPSIS
.LP
.B /usr/lib/cron/queuedefs
.SH DESCRIPTION
The
.I queuedefs\^
file describes the characteristics of the queues managed by
.IR cron (1M).
Each non-comment line in this file describes one queue.
The format of the lines are as follows:
.RS
.LP
\f2q\f3.\f1[\f2njob\f3j\f1][\f2nice\f3n\f1][\f2nwait\f3w\f1]
.RE
.LP
The fields in this line are:
.RS
.TP
.I q\^
The name of the queue.
.B a
is the default queue for jobs started by
.IR at (1);
.B b
is the default queue for jobs started by
.IR batch (1);
.B c
is the default queue for jobs run from a
.B crontab
file.
.TP
.I njob\^
The maximum number of jobs that can be run simultaneously in that queue; if
more than
.I njob\^
jobs are ready to run, only the first
.I njob\^
jobs will be run, and the others will be run as jobs that are currently running
terminate.  The default value is 100.
.TP
.I nice\^
The
.IR nice (1)
value to give to all jobs in that queue that are not run with a user
.SM ID
of super-user.  The default value is 2.
.TP
.I nwait\^
The number of seconds to wait before rescheduling a job that was deferred
because more than
.I njob\^
jobs were running in that job's queue, or because more than 25 jobs were
running in all the queues.  The default value is 60.
.RE
.LP
Lines beginning with
.B #
are comments, and are ignored.
.SH EXAMPLE
.RS
.nf
.ft B
a.4j1n
b.2j2n90w
.RE
.fi
.ft R
.LP
This file specifies that the
.B a
queue, for
.I at\^
jobs, can have up to 4 jobs running simultaneously; those jobs will be run with
a
.I nice\^
value of 1.  As no
.I nwait\^
value was given, if a job cannot be run because too many other jobs are running
.I cron\^
will wait 60 seconds before trying again to run it.
The
.B b
queue, for
.I batch\^
jobs, can have up to 2 jobs running simultaneously; those jobs will be run with
a
.I nice\^
value of 2.  If a job cannot be run because too many other jobs are running,
.I cron\^
will wait 90 seconds before trying again to run it.
All other queues can have up to 100 jobs running simultaneously; they will be
run with a
.I nice\^
value of 2, and if a job cannot be run because too many other jobs are running
.I cron\^
will wait 60 seconds before trying again to run it.
.SH FILES
/usr/lib/cron/queuedefs
.SH "SEE ALSO"
cron(1M)
	Guy Harris
	{ihnp4, decvax, seismo, decwrl, ...}!sun!guy
	guy@sun.com

> In my Motorola System V/68 manuals, there's a description of the format of
> queuedefs in section 2.17.1 of the Administrative Guidelines manual.  I had
> thought the Motorola manuals were just AT&T manuals reprinted, but Motorola
> might have added some sections.  Anyways, you might want to check anything
> called "Administrative Guidelines" in your manuals.

I already looked.  Motorola may very well have added some sections; if not,
AT&T must have deleted some.  There is no mention of the format of "queuedefs"
anywhere in the AT&T S5R3 manuals, not even in the System Administrator's
Guide, unless they buried it somewhere *very* obscure and left no pointer to it
in the index....
	Guy Harris
	{ihnp4, decvax, seismo, decwrl, ...}!sun!guy
	guy@sun.com