[cups] cups-lpd performance and scalability?

[Helge Blischke]

As long as you specify the printers „by hand“ (at least), like e.g. 
ipp://hostname_or_ip_address:631/printers/display?version=1.1 <ipp://hostname_or_ip_address:631/printers/display?version=1.1>
it works with CUPS servers running 1.3.x (in my example above 1.3.11),
thus no need to use cups-lpd.

Helge
> Am 23.08.2015 um 01:32 schrieb Tim Mooney <Tim.Mooney at ndsu.edu>:
> 
> 
> All-
> 
> I've downloaded the cups mailing list archives and spent quite a bit of
> time grepping them for anything related to cups-lpd, but I don't see where
> the question I have about cups-lpd scalability has been addressed before.
> 
> Because of the problems we've run into with Macs running Yosemite not
> being able to submit print jobs to our cups 1.3.7 print server via IPP,
> as described in these threads:
> 
>        http://www.cups.org/pipermail/cups/2015-August/027009.html
>        http://www.cups.org/pipermail/cups/2015-August/027012.html
> 
> We're therefore exploring enabling cups-lpd, so Macs and any other systems
> that can't do IPP 1.1 can submit print jobs to our cups 1.3.7 server.
> 
> The cups-lpd PERFORMANCE section has some pretty dire warnings about
> cups-lpd not scaling, though.  However, web searches I've done for
> "cups-lpd performance" have turned up
> 
>        https://bugzilla.redhat.com/show_bug.cgi?id=132949
> 
> which leads to this CUPS STR:
> 
>        http://www.cups.org/str.php?L804
> 
> That implies that a lot of the original cups-lpd performance issues were
> resolved in the 1.2 series when cupsGetDests() was improved.
> 
> Does that mean that the performance warnings in the cups-lpd man page
> are (somewhat) out of date?
> 
> Does anyone have any idea how cups-lpd scales, when used in a mixed
> IPP and LPD protocol environment?  We've converted our Windows labs to
> use IPP exclusively, so the majority of jobs submitted to our print server
> would be via IPP.  If cups-lpd is still a poor performer, though, we don't
> want to enable it and cause problems for IPP job submittal too.
> 
> Thanks much for any information you can provide!
> 
> Tim
> -- 
> Tim Mooney                                             Tim.Mooney at ndsu.edu
> Enterprise Computing & Infrastructure                  701-231-1076 (Voice)
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