Greg, I believe what you're referring to is talked about on this blog entry: http://www.sebastien-han.fr/blog/2013/06/24/what-i-think-about-cephfs-in-openstack/
With a corresponding blueprint/code fix for havana? https://blueprints.launchpad.net/nova/+spec/bring-rbd-support-libvirt-images-type Looked all this up a month or so ago... as I would personally also like to use Ceph for both ephemeral, cinder and Object storage. - Mitch On Wed, Sep 11, 2013 at 12:39 PM, Greg Chavez <[email protected]> wrote: > John: I'm talking about primary root disk storage. Secondary storage > would persist of course. > > Mike: Right, I just want to establish that if I set the default Cinder > plugin to RBD volumes, and I do nothing else, root volumes are ephemeral. > That seems to be the case anyway. > > Seems like some of these parameters become meaningless depending on your > backing store. As another example, do you really need to specify a root > disk parameter if you're booting from a volume? I would think not. > > Thanks for your responses. > > > On Wed, Sep 11, 2013 at 1:29 PM, Mike Dawson <[email protected]>wrote: > >> When you create an instance backed by an RBD Cinder volume, you can >> specify which behavior you want. There is a check box in Horizon to toggle >> the behavior. >> >> Thanks, >> Mike Dawson >> >> >> >> On 9/11/2013 1:15 PM, Greg Chavez wrote: >> >>> So if I use RBD as my storage backend for Cinder, what happens to the >>> root disks of VMs that I terminate? >>> >>> Do they still exist as RBD volumes in Ceph or are they >>> deleted/marked-as-free? >>> >>> If the answer is that they get deleted, or at the very least OpenStack >>> no longer keeps track of them, then there isn't much difference between >>> the root and ephemeral disks in the flavors I am using. other than their >>> being distinct disk devices. Or so it seems to me. >>> >> > > > -- > \*..+.- > --Greg Chavez > +//..;}; > > _______________________________________________ > Mailing list: > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack > Post to : [email protected] > Unsubscribe : > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack > >
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