[cups.general] Can we limit the number of active jobs on a given printer?
Johannes Meixner
jsmeix at suse.de
Tue Jun 22 08:12:54 PDT 2010
Hello,
On Jun 22 07:35 Helge Blischke wrote (shortened):
> I have no experience with real HP plotters but with a bunch of HP laser
> printers, most of them with their own built-in print server. Depending on
> their hardware properties - size of the built-in memory, hard disk etc -
> they tend to release the TCP connection as soon as they have encountered the
> end of the data stream (if a hard disk is present, even local spooling can
> be configured). Thus, they can accept the next job's data before the
> printing of the current job has finished.
Yes, but Kai Lanz initially reported that
"there were 7 backend processes running simultaneously"
I assume all were running for the same CUPS print queue.
Regardless what the recipient of the backend does with the data
(print it or store it somewhere or even just drop it), for one
print queue the cupsd runs only one backend at the same time.
In a later mail Kai Lanz wrote that
"these plotters accept input in a few different protocols, including lpd;
that is, they run their own line-printer daemon and maintain their
own internal job queue."
Therefore it seems to be o.k. when the plotters spool several jobs
in their built-in memory or on their built-in harddisk.
Kind Regards
Johannes Meixner
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