Details of compression=gzip

[Helge Blischke]

Steve Bergman wrote:

> We do a lot of printing over WAN/VPN links. I have a CUPS 1.3.9 server
> that queues jobs to a CUPS 1.4.8 server, which then sends the jobs to
> local printers at that location using a combination of lpd: and socket:.
> I've put compression=gzip in as an argument to ipp: for all the remote
> printers. Setting LogLevel to debug2, I can see that for most print jobs,
> I get a line in the log that reports that it compressed the file to xx% of
> its original size. But for some jobs, I don't get that line. To be clear,
> even for a single printer, some jobs report the compression statistic and
> some don't. Does CUPS just not compress files that aren't very
> compressible? Am I getting all the compression that I can?
> 
> Also, is there a way to get compression statistics without setting
> LogLevel to debug?
> 
> Thanks for any information,
> Steve Bergman

I guess the compression related log line is missing for the printers which 
are configured using the lpd: protocol, as LPD does not support compression.

Helge