[Openstack] understanding ephemeral and persistant volumes

Lorin Hochstein lorin at nimbisservices.com
Tue Feb 28 21:00:05 UTC 2012


On Feb 28, 2012, at 1:03 PM, George Mihaiescu wrote:

> 
> So by default the disk of an instance is basically stored on the local filesystem of the server where the instance is running (in "/var/lib/nova/instances/instance-0000000X/disk"), and it's called ephemeral because when you terminate the instance the entire directory "/var/lib/nova/instances/instance-0000000X" gets deleted and the virtual disk is gone, but the base image in the "_base" directory is not touched.
> 

Does this actually happen in diablo? I have a lot of /var/lib/nova/instances/instance-0000000X directories on my system even though the associated instances were terminated a long time ago.


Take care,

Lorin
--
Lorin Hochstein
Lead Architect - Cloud Services
Nimbis Services, Inc.
www.nimbisservices.com




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