[cups] cups-lpd performance and scalability?

[Helge Blischke]

My test configuration is as follows:

Client: OS X Yosemite (10.10.5), cups 2.0.0
Server: OS X Leopard (10.5.8), cups 1.3.11,
So, what is the OS X client bug?

Helge

> Am 23.08.2015 um 20:23 schrieb Tim Mooney <Tim.Mooney at ndsu.edu>:
> 
> 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>
>> <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 are (somewhat) out of date?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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>>> https://www.cups.org/mailman/listinfo/cups
>> 
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> 
> -- 
> Tim Mooney                                             Tim.Mooney at ndsu.edu <mailto: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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