Oh right yes, I actually went through the process of figuring this out, so it makes sense to share that rather than having you figure it out from scratch :-)
This script http://people.linaro.org/~mwhudson/snap.sh.txt does the same as nova-image create using the virsh binary (apart from the final upload to glance). Using a --shallow clone and then flattening it is apparently to work around an old qemu bug: https://github.com/openstack/nova/blob/master/nova/virt/libvirt/driver.py#L1638 and not doing that would, in my measurements on arm64 at least, help a bunch (unless I got very confused this code is present in havana too though so it can't be the cause of the regression). -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1327021 Title: regression in snapshot performance in trusty To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/1327021/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
