I'm struggling with the backup life settings for my data sets on disk.
I can't get this to work properly; either jobs are purged from disk which shouldn't have or jobs are still on disk while they should be purged.
For example I often see that there are daily jobs on disk but without the preceding full job. So these daily jobs are useless to keep on disk.
So I'm wondering what other users have for backup life settings; based on full backup count or based on time or both, with or without force expiry.
Full backup runs on Friday night = weekly backup
Incremental backup runs on Monday-Thursday night = daily backup
Backup is disk > disk > tape, used tapes are taken home each night.
I can divide the data on disk in 2 groups :
Group 1 - my file server: I want to be able to restore data from disk up to 2 weeks old. This server has it's own 'advanced backup options' for daily and weekly jobs.
Group 2 - all other servers: it is enough to restore data from disk up to 1 week old. These servers all use the same 'advanced backup options'.
On Tuesday Jan 10th, I want to restore a file from a server in group 2 from Wednesday Jan 4th.
To use the daily jobs from Wednesday Jan 4th, I would need the preceding full backup from Friday Dec 30th as well. So I would need to have 2 full backup sets on disk to be able to restore data from 1 week old, full backup from Friday Dec 30th + full backup from Friday Jan 6th. Correct?
In your opinion, what would be the correct backup life settings to accomplish this (both for the daily and weekly jobs) ?