refer to the comment by hidekazu, there is the case 1:M host:nodes when VMware vCenter driver is used. We can remove the first API call if we restrict Nova driver such as KVM only. Thanks licanwei -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.openstack.org/pipermail/openstack-discuss/attachments/20190527/d9f5bf27/attachment.html>