Summary

Our current backup solution is running into limits. We need to rebuild this into something more usable.

Plan 1

Rebuild current zfs pool into something more usable. Basically we need to move from a single zfs volume (/backup) for the whole backupset, to a volume per host (/backup/hostname). We also need to rework snapshots into per-host snapshots.

Plan 2

Scrap the current design and move to https://www.proxmox.com/en/proxmox-backup-server/overview, since this is also zfs based AND be integrated into our hypervisor. This would mean deleting backup.vm.nurd.space, and repurposing its disks with proxmox-backup-server.