use ZFS for OSDs

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Hi,

We are looking to use ZFS for our OSD backend, but I have some questions.

My main question is: Does Ceph already supports the writeparallel mode for ZFS ? (as described here: http://www.sebastien-han.fr/blog/2013/12/02/ceph-performance-interesting-things-going-on/) I've found this, but I suppose it is outdated: https://wiki.ceph.com/Planning/Blueprints/Emperor/osd%3A_ceph_on_zfs

Should Ceph be build with ZFS support? I found a --with-zfslib option somewhere, but can someone verify this, or better has instructions for it?:-)

What parameters should be tuned to use this?
I found these :
    filestore zfs_snap = 1
    journal_aio = 0
    journal_dio = 0

Are there other things we need for it?

Many thanks!!
Kenneth

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