http://www.symantec.com/business/support/index?page=content&id=TECH135182
this may give some insite
Been looking at this myself.
The image clean up is part of it.
By default it is set to 12 hours and can go a low as 8 hours.
A clean up will run after a restore if nothing else is running, or after a session of backups.
But it is the bpexpidate -deassigempty that expires images.
And this you cannot change when it runs
I understand Netbackup does a cleanup process on a regular bases when a job fails or ends etc. Also
I understand a nightly cleanup process runs to expire images on disk etc.. What time does this nightly cleanup
job kick off or better yet, how do I change this job to run at a specific time?