Re: CUPS printing

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"Mike P" <mpope@xxxxxxxxx> writes:

Is there any way to make CUPS start printing the job before it is fully
spooled - kind of like Windows has the option for start printing after
first page?

Not to my knowledge. There are some fairly good reasons why this is a
bad idea, such as not sending the data fast enough to print (can
damage some printers if they are waiting for data while in mid-page).
For some jobs, it's not possible to process/filter the job until you
have it in its entirety (e.g. PDF, some image formats).

Windows applications print using the Windows GDI, so it is in a
position to know when its possible to send a whole page. Even so,
this could lead to a selfish user hogging the printer indefinitely,
simply by leaving the pipe to lpr open.

I have a customer that has a large print job that take 30 Min to spool
- that's 30 min of printer downtime.

This is not a common situation. Which program is generating the data.
How many pages, and how large is the job? Where is the limiting
factor?

Examples:
- - job generation
- - sending to the spooler
- - preprocessing
- - filtering
- - sending to the printer

Note that this is only "downtime" if the printer is not in use during
the time it takes to spool the job. CUPS could be unspooling other
jobs during this period.

I have seen slowness when sending a job over 2 GiB to a wide-format
(A1) roll printer over the network. The two bottlenecks were sending
the job (piping 2 GiB over the network took some time), and
rasterisation (done on the client in this case), since generating a 2
GiB raster takes a lot of CPU time.


Regards,
Roger

- --
Roger Leigh
Printing on GNU/Linux? http://gutenprint.sourceforge.net/
Debian GNU/Linux http://www.debian.org/
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