[Printing-architecture] snmp - average-toner-coverage per page

Predut, Marius marius.predut at intel.com
Mon May 9 09:42:20 UTC 2016

> -----Original Message-----
> From: Johannes Meixner [mailto:jsmeix at suse.de]
> Sent: Monday, May 09, 2016 11:40 AM
> To: Predut, Marius
> Cc: printing-architecture at lists.linux-foundation.org
> Subject: RE: [Printing-architecture] snmp - average-toner-coverage per page
> Hello,
> On May 5 20:53 Predut, Marius wrote (excerpt):
> >>>> 4. Get the PostScript stream while print job filtering
> >>>>     and analyze it.
> ...
> > I don't have access to the document sent for print
> Then you cannot analyze the PostScript stream.
> > I need a solution to query the counter printer and compound somehow
> > the wanted value (an estimate toner spent for page) For example if I
> > know effective area printed on a page I can estimate the coverage
> > percent.
> > The printer  have an IP address.
> >
> > So, do you have/see other solution here ?
> I am afraid, I do not see another solution except to query the network
> printer itself via SNMP.
> I think when you can only access a network printer itself, you can only query
> its internal counters/values via SNMP.
> I do not know if usual network printers maintain an internal counter/value
> that can be used to calculate the average toner-coverage per page.
One idea can be to counts pixels on each page, 
divides pixel count by pixels possible on a page to give the percentage of coverage,
 and keeps a rolling average percent weighted by area printed. 
But I don't know if SNMP can give me this counters.
This printer RFC  https://tools.ietf.org/html/rfc3805
Don't help me too much.
(OIDS that can be interesting in this context : somehow this OIDS can be used : prtMarkerSuppliesGroup prtMarkerCounterUnit prtMarkerLifeCount
But I don't know how to deal with)
> Only FYI:
> For some possible issues that I noticed regarding SNMP with network
> printers, you may have a look at
> https://en.opensuse.org/SDB:Printer_Accounting
> Kind Regards
> Johannes Meixner
> --
> SUSE LINUX GmbH - GF: Felix Imendoerffer, Jane Smithard, Graham Norton -
> HRB 21284 (AG Nuernberg)

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