Hi Lei: I think Openstack manual shows a clear explanation for the differents kinds of storage. Check out this link ( http://docs.openstack.org/essex/openstack-compute/install/apt/content/terminology-storage.html ) Hope it clarifies you. Regards, JuanFra 2012/11/29 Lei Zhang <zhang.lei.fly at gmail.com> > thinese -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.openstack.org/pipermail/openstack/attachments/20121129/7396788c/attachment.html>