On 4/15/2019 4:46 PM, Mike Carden wrote: > For what it's worth, we had a discussion about this in November last year: > > http://lists.openstack.org/pipermail/openstack-discuss/2018-November/000209.html > > I made a comment at the end of that thread about a 'workaround' we have > used. It still happens here on Queens and the workaround doesn't solve > it permanently. OK so specifically setting [placement]/randomize_allocation_candidates=True in your config that's running the placement service, correct? I can always remember host_subset_size but always forget randomize_allocation_candidates. At least they default to the same behavior (packing). https://docs.openstack.org/nova/queens/configuration/config.html#placement.randomize_allocation_candidates -- Thanks, Matt