[cups] cups-lpd performance and scalability?

[Tim Mooney]

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are (somewhat) out of date?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)
Room 242-J6, Quentin Burdick Building                  701-231-8541 (Fax)
North Dakota State University, Fargo, ND 58105-5164