[pve-devel] ZFS-over-NFS

Andreas Steinel a.steinel at gmail.com
Tue Jul 26 18:08:32 CEST 2016


On Mon, Jul 25, 2016 at 9:07 PM, Dmitry Petuhov <mityapetuhov at gmail.com>
wrote:

> Why not use qcow2 format over generic NFS? It will give you
> shapshot-rollback
> features and I don't think that with much worse speed than these features
> on ZFS level.
>

I want to have send/receive also and I use QCOW2 on top of ZFS to have
"switch-to-that-snapshot" capability, what ZFS not supports.


> But on my experience, NFS storage for VMs is bad idea: it causes huge
> latencies under
> load, leading to chashes. If you want ZFS-based shared storage, then ZFS
> over iSCSI
> is your choice.
>

I don't want to use another FS over ZFS which I need to use when using LXC
(in addition to KVM). Then I need to trim it manually to get back free
space in ZFS. I have this at the moment and I do not like it.


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