Firstly, a few key point about our configuration:
We are running Veeam 22.214.171.1245.
We have approximately 30 backup jobs, backing up a total of approximately 47 VM's.
All jobs are configured as reverse incremental (with varying number of restore points)
None of the jobs have "Exclude deleted file blocks" selected
None of the jobs have Active Full Backups configured
We backup to a SAN which provides approximately 5.3TB of storage. We are getting to a point where we only have around 300GB of storage left.
So everything has been running smoothly, but I am getting low on storage space. I have started to do some research today and I have discovered that I might be able to use deduplication (not something I was previously aware of) and the "Exclude deleted file blocks" (also something which I previously was unaware of) to claw back from storage.
I am looking to get some advice on deduplication and how effective it is.
Is it just a case of re-configuring my backup jobs so that VM's which were built from the same template are in the same job and this cuts down on the duplication of data?
What about if they were not built from the same template but are the same OS? Does this cut down on the amount of data that is backed up?
Is there a way to roughly estimate how much storage might be saved? (For example if I had 2 x 60gb servers built from the same template which were previously in 2 separate jobs, but were now in the same job how much storage would I expect to see recouped).
I have also been reading about the "Exclude deleted file blocks" option, which I have not noticed in previous version of Veeam. It sounds like this could save me some storage (especially on file servers etc) I did some reading up about this and believe that in order for me to take advantage of this, I need to periodically run a Full Active Backup (I subsequently understand that this is probably something I should be doing anyway to avoid corruption in the .VBK).
So my questions regarding the Full Active Backup are:
Should I enable it?
Will it mean that I have a second full size .vbk alongside my .vbk from the reverse incremental? (I am going to struggle to accommodate this due to lack of storage)
Are there any other tips to help me manage my situation with consideration that I only have around 300Gb spare to play with at present?
Thanks in advance!