Hi, All Thanks Sean's good comments. Cause there lots of links and discuss, I come out with a docs for collections comments,  options,  and investigating.  please move to google docs for discuss, thanks: https://docs.google.com/document/d/1kRRZFq_ha0T9mFDOEzv0PMvXgtnjGm5ii9mSzdqt... links: https://review.openstack.org/#/c/621476/  show server numa_topology https://blueprints.launchpad.net/nova/+spec/show-server-numa-topology  (yonglihe) Regards Yongli He