Newbie: BTRFS and Timemachine support

Hello,

after replacing my hardware I decided to change from an "handmade" NAS to an NAS distribution.
I'm using virtualization via XEN. I have a lot of knowledge with Linux (specially Debian etc.).
So I decided not to start with an BSD based NAS like FreeNAS.
I also decided not to start with Rockstor (Because it's based on CentOS and it has some issues with virtualization).

Installation of OMV 2.1 and also 3beta works well.

But I miss some things:
1.) Support for BTRFS (or ZFS). I found some reports that it should work, but I cannot create an BTRFS storage. Just the "normal" things like ext4.
2.) Support for Time Machine. Is there a special function I didn't found or must I install the Netatalk plugin (Which was not possible in the beta)?

Is it possible to fix that issues or must I change to an different NAS software?

Thanks!

So maybe I'm doing something wrong.
I have two unformatted "drives". Thats 2 virtual disks (Because OMV is running as a DomU).
When I'm going to "File Systems" I can choose ext3, ext4, XFS and JFS.

Yes, might be.
But it's not working with my 3.0.2beta.
I'm not able to choose btrfs and don't understand why...

ok, that make sense

Tried it.
But no update via the GUI available.
So I did an "apt-get update / dist-upgrade" and now I can choose btrfs.

But it's not possible to choose any quotas, I think it's not implemented for btrfs so far?