[pve-devel] ZFS-over-NFS

Dmitry Petuhov mityapetuhov at gmail.com
Tue Jul 26 20:31:50 CEST 2016

26.07.2016 19:08, Andreas Steinel 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.
What you mean by send/receive?
So you want to combine ZFS and qcow2 exclusive snapshot features at same time?
I don't think that's possible.

>> 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.
Not understood that too. You asked about "ZFS filesystems exported by NFS".
NFS IS another FS on top of ZFS.

So you want to use part of host's local ZFS [almost] directly in containers like it was in
PVE 1-3 with OpenVZ?

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