How does the Remove retention files for overlap policy under Advanced Retention Policy work?
In general, daily snapshots followed by a weekly snapshot or a monthly snapshot, etc. will be removed; weekly snapshots followed by a monthly snapshot or a quarterly snapshot, etc. will be removed; and so on. This is illustrated by the following example. Assume today is 17Jan06, and the Advanced Retention Policy is as follows: – Daily: retain for 7 days – Weekly: retain for 4 weeks (the job will be performed on Saturday) – Monthly: retain for 3 months (the job will be performed on 1st of each month) If Remove overlap policy is NOT enabled: Then a total of 14 snapshots (7+4+3) will be kept on the server accordingly, i.e.: (daily) 10Jan06, 11Jan06, 12Jan06, 13Jan06, 14Jan06, 15Jan06, 16Jan06 (weekly) 24Dec05, 31Dec05, 7Jan06, 14Jan06 (monthly) 1Nov05, 1Dec05, 1Jan06 If Remove overlap policy is enabled: Then only the following snapshots are kept: 1Nov05, 1Dec05, 1Jan06, 14Jan06, 15Jan06, 16Jan06. Specifically, the weekly policy overrides the daily policy so 10Jan06, 11Jan06, 12Jan06 and 1
