[PVE-User] btrfs in a guest

[Yannis Milios]

>
> >> Personally I'd go with zfs over btrf.
>
>> Interesting. I see that also with zfs, you can expose previous versions
via samba.

>> You prefer zfs, because..? (The "more mature" argument, or other reasons
as well..? perhaps specific to running on Qemu VM on ceph >> storage?)

I would go for ZFS for that scenario but definitely I wouldn't try to use
it on a VM. I would prefer a physical server running a linux distro and ZoL
for ZFS or maybe FreeNAS + SAMBA to expose the shares on clients. You could
also use a second server as a ZFS sync target for failover purposes..

Yannis

On Mon, Jul 17, 2017 at 12:20 PM, lists <lists at merit.unu.edu> wrote:

> Hi Lindsay,
>
> Thanks for your reply.
>
> On 17-7-2017 1:04, Lindsay Mathieson wrote:
>
>> The Samba server is a Qemu VM?
>>
> yes.
>
> The backing filesystem (Ceph) should be irrelevant to whatever filesystem
>> you use in the VM.
>>
> Yes, I realise that. I know it's possible, and btrfs and xfs also seem to
> perform (after some brief testing) similarly. But there is a lot of
> discussion about "CoW penalty".
>
> And that's why I'm asking.
>
> For what it's worth: Our ceph has xfs OSDs.
>
> So, should I worry about this CoW penalty or not really?
>
> Personally I'd go with zfs over btrf.
>>
> Interesting. I see that also with zfs, you can expose previous versions
> via samba.
>
> You prefer zfs, because..? (The "more mature" argument, or other reasons
> as well..? perhaps specific to running on Qemu VM on ceph storage?)
>
> MJ
>
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