Ephemeral/Persistent disks
Asked by
aimar
Hi,
Actually I am running OpenStack Folsom release and I was wondering about the point that OpenStack handle the disks.
When we ask Nova to boot a VM, nova-compute will connect to Glance and "GET" the image file from Glance and save it on the its local filesystem. So by default the disk of an instance is basically stored on the local filesystem of the server where the instance is running that is the 'ephemeral' disk. In oppoiste of persistent disks, the ephemeral disks will be discarded if the VM is shut down and on failures.
Is that possible to make nova boot the primary disk 'ephemeral' as persistent from a volume instead in the local machine runing the hypervisor ?
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