[Feature] Configurability for MaxJobs and PreserveJobHistory

[olifre]

The default settings for these are 500 jobs and PreserveJobHistory is true.
This means that up to 500 job files will be kept in the spool directory. For large jobs, this easily adds up to GB of data.

It would be nice to be able to configure MaxJobs and / or PreserveJobHistory with this module to limit hefty space usage in case full history is not needed.

[arlt]

This is really important in my opinion - but:

• PreserveJobFiles: Specifies whether or not to preserve job files after they are printed.
• PreserveJobHistory: Specifies whether or not to preserve the job history after they are printed.
• MaxJobs: Specifies the maximum number of simultaneous jobs to support.

So i think you (and me) want to configure PreserveJobFiles. I don't see an option in the man cupsd.conf to limit the number of preserved print jobs. But it seems to work (apple/cups#3143):

 PreserveJobHistory On
 PreserveJobHistory Off
+PreserveJobHistory 1w
+PreserveJobHistory 7d
+PreserveJobHistory 168h
+PreserveJobHistory 10080m
+PreserveJobHistory 604800

I tested with CUPS 1.6.3 and PreserveJobFiles 1m (minute) and PreserveJobHistory 7d - the jobs (not the history) where cleaned up after a minute and the reprint-button disappeared.

So i vote for two options:

• PreserveJobFiles
• PreserveJobHistory

Allowed values: (On|Yes|Off|NO|[1-9][0-9]*[wdhm]?)

[olifre]

I join your vote, thanks for checking out the correct meaning of these parameters ;-).

[arlt]

maybe you should correct the title: PreserveJobFiles instead of MaxJobs