I am redesigning our Veeam infrastructure, and will be introducing a tape library and drive in order to have that 3rd copy of VMs, as well as to have the ability to store backups off-site.
I know that Veeam has an “Unofficial tape library compatibility list”, with both verified and not verified to work products. Beyond actually working with Veeam, I am concerned about both backup speed and capacity of the various tape technologies.
We currently backup 168 VMs. We have 10070 GB of full backups, and 1771 GB of increments. This will increase with our redesign because we will be increasing the retention time for backups. Our source VMs take 39500 GB disk space.
I am considering a Dell PowerVault TL2000 or TL4000, either LTO 6 or LTO 7.
Not having used Veeam with a tape drive, I am not sure how configuring a secondary destination to tape for a backup job will affect our backup window for the initial VM backup to disk, nor the performance of the Veeam B&R server and proxies.
So here are my questions:
1.Does configuring the secondary backup destination affect the initial backup to disk job?
2.If so, does backing up to tape require additional proxies to handle the processing of jobs, so that the primary backup jobs finish within the configured backup window? We currently process all backups between 5:30 PM and 6:00 AM.
3.We run forever incremental backups. For the amount of data we backup up nightly, do you have recommendations on the LTO version, and number of drives to deploy? Since this affects both the write speed to tape, and capacity, selecting both the LTO version, and number of drives, will be critical to assure we design this right the first time.
4.I am not committed to the Dell solution, but this is the hardware I am familiar with, and that can be used to restore legacy backups from our physical servers. Does anyone have a compelling argument for designing a system with one of the other tape drives on the Veeam list?
Thanks in advance for your input.