Public bug reported: 'nova image-create' is a lot slower on a trusty openstack than a precise one:
+---------+--------+----------------+-------------------+ | ubuntu | image | disk size (GB) | snapshot time (s) | +---------+--------+----------------+-------------------+ | precise | cirros | 1 | 6 | +---------+--------+----------------+-------------------+ | precise | cirros | 10 | 6 | +---------+--------+----------------+-------------------+ | precise | trusty | 10 | 38 | +---------+--------+----------------+-------------------+ | trusty | cirros | 1 | 15 | +---------+--------+----------------+-------------------+ | trusty | cirros | 10 | 61 | +---------+--------+----------------+-------------------+ | trusty | trusty | 10 | 100 | +---------+--------+----------------+-------------------+ It's also interesting that the time in trusty appears to depend on the disk size whereas it didn't in trusty. AFAICT the nova code is the same in both havana and icehouse, leaving libvirt as the most likely culprit -- but this is not confirmed. ** Affects: libvirt (Ubuntu) Importance: Undecided Status: New ** Description changed: 'nova image-create' is a lot slower on a trusty openstack than a precise one: +---------+--------+----------------+-------------------+ - | ubuntu | image | disk size (GB) | snapshot time (s) | + | ubuntu | image | disk size (GB) | snapshot time (s) | +---------+--------+----------------+-------------------+ - | precise | cirros | 1 | 6 | + | precise | cirros | 1 | 6 | +---------+--------+----------------+-------------------+ - | precise | cirros | 10 | 6 | + | precise | cirros | 10 | 6 | +---------+--------+----------------+-------------------+ - | precise | trusty | 10 | 38 | + | precise | trusty | 10 | 38 | +---------+--------+----------------+-------------------+ - | trusty | cirros | 1 | 15 | + | trusty | cirros | 1 | 15 | +---------+--------+----------------+-------------------+ - | trusty | cirros | 10 | 61 | + | trusty | cirros | 10 | 61 | +---------+--------+----------------+-------------------+ - | trusty | trusty | 10 | 100 | + | trusty | trusty | 10 | 100 | +---------+--------+----------------+-------------------+ It's also interesting that the time in trusty appears to depend on the disk size whereas it didn't in trusty. AFAICT the nova code is the same in both havana and icehouse, leaving libvirt as the most likely culprit -- but this is not confirmed. -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to libvirt in 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-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs