ZFS on ZFS

[r9xjay]

Hello,

I plan to move our companies backup server to the cloud on Proxmox.
The backup software forces the use of ZFS. This would be I'd be creating a ZFS pool on top of another ZFS pool that the VM is running on. Is this okay?
I'm thinking a 3-disk raidz1 and then just pass that 1 disk through to the VM where the software will make its own ZFS pool on.

Thanks!

 

[leesteken]

You'll have write amplifiaction on top of write amplication. And RAIDz1 has padding overhead with so few drives and you'll probably have a mismatching volblocksize, losing a lot of space.
Maybe run the VM on LVM instead? Or run the software in a container (if it is based on Linux)? Or simply passthrough the 3 drives (either disk passthrough or PCIe passthrough of a controller) and do the ZFS raid inside the VM.

 

[alexskysilk]

The backup software forces the use of ZFS.

what software is that?