Best Practices for setting up Online Backup Retention?

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We have Acronis Online Backup & Recovery 11 and will be implementing it on 3 servers.

Can anyone point me to best practices on setting up retention of backups? Does anyone have experience setting these up and seeing the results?

I'm reading the Acronis B&R 11 User Guide, and section 12.1.6.5 "What happens if I run out of space?" states:
"When a machine's backups are about to exceed the storage space ... you will receive an e-mail... This means you have to free some space... you may also want to set or edit the retention rule so that an overflow doesn't occur in futrue. Once the occupied space reaches the limit, the backups will cease to run."

I'd like guidance setting the limit ahead of time so I don't have to face this situation.
Each server will be on a 1 TB plan. No server has more than 500GB at the moment, so I think we are good for a while. But ... what retention rule should I set up ahead of time? And what data will Online Backup not retain?

I spoke with a technician yesterday who said that the retention rules for online backup do a consolidate operation and not a delete but I don't see this documented anywhere.

Thanks in advance from someone who likes to plan in advance :)

Mer, 08/01/2012 - 19:21
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Hello Rodrigo Torres,
Consolidation is just a method of deletion but not an alternative to deletion. Think of your backups as of recovery points. If you delete a recovery point of "June 10" and keep the next recovery point of "July 10", you will keep the data as of July 10. You won't be able to recover a file that was deleted, say, on June 30th.

As regards to retention rules - currently you have only one option: choose "Simple" backup scheme > "Delete backups older than.." and specify the maximum age that depends on your needs and backup schedule.
Let's assume you do weekly backups. For 500GB, the 1st backup size may be about 400GB (consider Initial Seeding for so big data). If weekly data growth is 10GB, then you might not need to set up retention rules at all. During a year, you will consume approximately
400GB + 10GB*50 weeks= 900GB.

Mer, 08/01/2012 - 21:09