There was a thread back in July that rehashed some of the issues with quota classes in Nova: http://lists.openstack.org/pipermail/openstack-dev/2016-July/099218.html That's come back up again today and while I've missed the spec deadline for Ocata, I'm proposing a spec for Pike to deprecate the quota classes API: https://review.openstack.org/#/c/411035/ I'd appreciate operator input on that spec (or mailing list discussion) in case there are use cases I'm not aware of which would mean we don't want to go this route. -- Thanks, Matt Riedemann