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I've upgraded recently to Kerio 9.0.2 (from 8.5.3) and when I look into the backup folder, I don't see a lot of incremental backups. Is something wrong in my setup, or is there something going wrong with Kerio?

I have a diff schedule for saterday-monday and a full backup on sunday. I keep 3 full backups and split files larger than 2 Gb. This has been the case for years now. But this is how my backup dir looks like.

-rw------- 1 root root 230317876 Feb 20 00:01
-rw------- 1 root root 265140850 Feb 27 00:01
-rw------- 1 root root 2146247708 Feb 14 01:11
-rw------- 1 root root 2147333315 Feb 14 01:17
-rw------- 1 root root 2143144150 Feb 14 01:23
-rw------- 1 root root 2144918119 Feb 14 01:29
-rw------- 1 root root 2141983625 Feb 14 01:34
-rw------- 1 root root 2145978004 Feb 14 01:38
-rw------- 1 root root 1710176661 Feb 14 01:42
-rw------- 1 root root 2147455477 Feb 14 01:04
-rw------- 1 root root 2146038736 Feb 21 01:11
-rw------- 1 root root 2147139410 Feb 21 01:17
-rw------- 1 root root 2144381913 Feb 21 01:23
-rw------- 1 root root 2141280910 Feb 21 01:29
-rw------- 1 root root 2133813417 Feb 21 01:34
-rw------- 1 root root 2146690461 Feb 21 01:39
-rw------- 1 root root 1792023466 Feb 21 01:43
-rw------- 1 root root 2144930448 Feb 21 01:04
-rw------- 1 root root 2147455936 Feb 28 01:12
-rw------- 1 root root 2140709860 Feb 28 01:18
-rw------- 1 root root 2145594911 Feb 28 01:24
-rw------- 1 root root 2138576934 Feb 28 01:30
-rw------- 1 root root 2147320861 Feb 28 01:35
-rw------- 1 root root 2146014834 Feb 28 01:40
-rw------- 1 root root 1877937443 Feb 28 01:44
-rw------- 1 root root 2146057597 Feb 28 01:05

Why are there only 2 differential backups? I would expect that between each full backup, I would have a differential file per day. If this is a config error on my side, how can I achieve this?


Pavel Dobry (Kerio)

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I think this is wrong expectation. Backup is intended for disaster recovery and thus it keeps only recent "snapshot" of the message store. New differential backup replaces old one from previous day as it is no longer needed.

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Ok, so what I try to achieve is to have the possibility to do a point in time recovery for the most recent two weeks. It's ok that this is not to a specific time/date, but just a date. Do I need to make 14 full backups? If I make a weekly full backup, and keep the most recent 3. I would like to maintain the differential backups in between as well. Emails received on day x and deleted the next day have a very low possibility to get recovered otherwise. I use backups not only for disaster recovery, but also for end-user mistakes.
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