I am planning a change at a Backup site and would be grateful for some input.
First I'll outline how the current setup is and why we want to change things so you get a broad overview:
Currently there are 13 VMs on a single ESX-Host. They get backed up by veeam agents. (Thats a temporary solution).
Those VMs consume about 8.5 TB on the ESX-Host
They get backed up daily by the agent to a QNAP-NAS with a size of about 15TB
On the backup target they need about 8TB of space - a little less than the disk files on the ESX-host but I heard that could happen due to veeam magic.
So theres 7TB free space available on the backup target.
Right now the backups are reverse incremental. That means there is one full backup file (.vbk) for every VM and 14 incremental backup files (.vib) on the NAS.
There are no Copy Jobs configured.
I hope the above outline helps to paint a mental picture of the system.
I'll get to the changes we are planning to do now and hope you share your thoughts on them:
- There will be cloud-storage involved to off-load long term retention backups. (that aren't present as of today)
- In order to do this we configure an SOBR and offload to the cloud (S3 compatible bucket) everything thats older than say 30 days.
- The local extend of the SOBR will be on the current NAS.
- We plan to have a daily backup job that creates 31 restore points on the local extend of the SOBR.
- Every saturday a synthetic full backup will be created. This is necessary so the offloading process to the cloud can take place (it needs a finalized backup-chain if I understand correctly)
- Please share if you think this is a reasonable idea. I'm doing this for the first time.
Also I have concerns about the storage space we need on our NAS if we configure it this way but the final consumption is too hard to predict for me.
Right now our backups are of the reverse incremental strategy. That means we have one full backup and 15 incrementals.
This will be replaced by four full backups and 26 (or so?) incrementals in between the full backups.
- Will we really need about four times the storage space when we change our backup strategy as I described?
What do you think?