[pve-devel] ceph osd over zfs volume

Paul Penev ppquant at gmail.com
Fri Apr 18 09:26:27 CEST 2014

Dietmar wrote:
>>>If you want to manage OSDs on ZFS, please also provide patches to make the GUI
>>>able to manage that.

The gui actually works quite nicely, once the OSD is added by hand
with pveceph createosd. You can in/out and stop/start the osd as you
do with all other osd. A ZVol emulates a block device in a way similar
to what iscsi or lvm does.

2014-04-18 8:28 GMT+02:00 Alexandre DERUMIER <aderumier at odiso.com>:
> Please note that ceph/intank don't support zfs currently.
> http://wiki.ceph.com/Planning/Blueprints/Emperor/osd%3A_ceph_on_zfs
> So, it could be buggy, be carefull.

Yes, there is more space for using zfs capabilities in ceph, for
example for snapshotting. The wiki actually encourages me to test zfs
more deeply.

I interpret it in a positive way: The ceph developers are aware of ZFS
and they recognize that there could be some usefulness in using it
under ceph.

>From the tests I did in the last few days using emperor, it turns out
that ZFS actually works under ceph. However ceph is very taxing on
iops then it comes to tasks like healing the PGs after a failure.

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