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On 03/07/2016 09:32 PM, Mike Smith wrote:
> You can also run Ceph for nova ephemeral disks without Cinder at all.
>   You’d do that in nova.conf.
>
> We use both at Overstock.  Ceph for nova ephemeral for general use, and
> also Ceph as one option in a multi-backend Cinder configuration.  We
> also use it for a Glance store, which is a fantastic option because it
> makes disk provisioning for Nova instant, since you’re essentially
> snapshotting and image RBD into an RBD for Nova/Cinder.

Out of curiosity, how is the performance of doing this (using ceph for 
nova ephemeral disks); any details u can share on the network required 
to do this (decently) and what app. usage patterns u have that can 
tolerate the latency (whatever it is)?

-Josh