[cups] cups-lpd performance and scalability?

Tim Mooney Tim.Mooney at ndsu.edu
Sun Aug 23 11:23:34 PDT 2015


In regard to: Re: [cups] cups-lpd performance and scalability?, Helge...:

> 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.

We tried that when defining the printer on the OS X client, as described
in the 2nd thread.  It appears there may be a bug with the OS X client,
as Michael suggested in his response in the thread.

Tim


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 are (somewhat) out of date?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



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