Nested Proxmox - CoW on CoW concerns?

[Thomas Stone]

Hello!

(fairly experienced Proxmox home-lab user here)

I'm going to try installing Proxmox on a VPS that has more resources than I need. The VPS provider uses Proxmox as their hypervisor and tells me that my virtual disk is stored on ZFS.

Would that affect the file system I choose when I install my Proxmox hypervisor on the VPS? And further down the line, though I'll try to use CTs, if I make a KVM in 'my' Proxmox, does this unusual set up suggest any filesystem to use or not use for that virtual disk?

Thank you!

eg

VPS Hypervisor  -- My Hypervisor -- My KVM machine disk(s)

ZFS                 ext4             ZVol

ZFS                 ZFS              ZVol

ZFS                 ext4             qcow2

 

[VictorSTS]

I would go with LVM unless you want to use i.e. zfs-sync replication from "your" proxmox at the VPS to some other external Proxmox. It makes little sense to use ZFS in "your" Proxmox: CoW stacking and read/write amplification stacking will affect performance (which OTOH will be already be restricted by the VPS type/level) and the benefits of ZFS resiliency are already provided by the VPS itself.

 

[Thomas Stone]

Thanks @VictorSTS!