Hi, Zhenyu! I think we should ask DB guys about migration. But my personal opinion is that DB migration is much painful than new microversion. But it seems too late to have a microversion for this cycle. > Correct me if I'm wrong but I thought that Feature Freeze will be in action Jan 26. https://wiki.openstack.org/wiki/Nova/Ocata_Release_Schedule Even if we need a new microversion I think it will be a specless microversion and patch will change about 5 lines of code. We can merge such patch in one day. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.openstack.org/pipermail/openstack-dev/attachments/20170117/8a3f7e2c/attachment.html>