In resize, we convert the disk and drop peel backing file, should we judge whether we are in shared_storage? If we are in shared storage, for example, nfs, then we can use the image in _base to be the backing file. And the time cost to resize will be faster. The processing in line 5132 https://github.com/openstack/nova/blob/master/nova/virt/libvirt/driver.py Thanks -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.openstack.org/pipermail/openstack-dev/attachments/20140724/53e9fa01/attachment.html>