If I am understanding this correctly, if I start a new Job on Sunday with Saturday being the day I create a Synthetic Fulls and have my retention set to 13 days I will essentially have the original Full VBK backup and 2 additional Full VBK Synthetic Backups? I really only want no more than 2 full VBK files at a time but I do not want to set my retention to below 5 to achieve this. Is the only way around this to Transform previous full backups?
Thanks
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Re: Synthetic Full Backup Retention Question
Hello Jamie,
Given 13 points for retention, you will generally have 2 synthetic fulls on disk, and in some days - 3. This happens because incremental passes "cannot survive" without their "parent" full backup. And in order to preserve retention policy, B&R has to keep a full chain even if a part of this chain is no longer needed.
Please refer to this topic for further explanation how things work: Rollback points and full backups
In your case, you can use Transform or switch to Reverse Incremental mode. Hope it helps!
Given 13 points for retention, you will generally have 2 synthetic fulls on disk, and in some days - 3. This happens because incremental passes "cannot survive" without their "parent" full backup. And in order to preserve retention policy, B&R has to keep a full chain even if a part of this chain is no longer needed.
Please refer to this topic for further explanation how things work: Rollback points and full backups
In your case, you can use Transform or switch to Reverse Incremental mode. Hope it helps!
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Re: Synthetic Full Backup Retention Question
Alexey,
First thanks for your response!
Second,
If I go the route of Forward incremental with synthetic fulls and transform, will this work with the Linux agents if I backup to a Linux OS in a different site?
First thanks for your response!
Second,
If I go the route of Forward incremental with synthetic fulls and transform, will this work with the Linux agents if I backup to a Linux OS in a different site?
Re: Synthetic Full Backup Retention Question
Jamie, yes, this should work and I don't see any drawbacks.
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