<div dir="ltr"><div>John: I'm talking about primary root disk storage. Secondary storage would persist of course.</div><div><br></div>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.<div>
<br></div><div>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.</div>
<div><br></div><div>Thanks for your responses.</div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Wed, Sep 11, 2013 at 1:29 PM, Mike Dawson <span dir="ltr"><<a href="mailto:mike.dawson@cloudapt.com" target="_blank">mike.dawson@cloudapt.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">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.<br>
<br>
Thanks,<br>
Mike Dawson<div class="HOEnZb"><div class="h5"><br>
<br>
<br>
On 9/11/2013 1:15 PM, Greg Chavez wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
So if I use RBD as my storage backend for Cinder, what happens to the<br>
root disks of VMs that I terminate?<br>
<br>
Do they still exist as RBD volumes in Ceph or are they<br>
deleted/marked-as-free?<br>
<br>
If the answer is that they get deleted, or at the very least OpenStack<br>
no longer keeps track of them, then there isn't much difference between<br>
the root and ephemeral disks in the flavors I am using. other than their<br>
being distinct disk devices. Or so it seems to me.<br>
</blockquote>
</div></div></blockquote></div><br><br clear="all"><div><br></div>-- <br>\*..+.-<br>--Greg Chavez<br>+//..;};
</div>