On Thu, Apr 5, 2018, 2:33 PM Nicolas Ecarnot <nicolas@ecarnot.net> wrote:
Hello,

Amongst others, I have one 3.6 DC working very well since years and all
based on GlusterFS.
When having a close look (qemu-img info) on the images, I see their
format is all RAW and not QCOW2.

Raw sparse. 


I never noticed or bothered before, but I'm wondering :
- is it by design?

Yes, for performance reasons. 

- it is something we can change (I'd prefer qcow2)

No.

- it there some limitations?

Not that I know. 


And finally, I have the same questions about NFS storage domains.

Same as Gluster, and other file-based storage. 
Y. 


Thank you.

--
Nicolas ECARNOT
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