If NUMA topology is set, CPU topology is still needed?
For example, I want to VM to run on one of the host NUMA nodes with four dedicated CPUs, it's enough with following commands?
openstack flavor set FLAVOR-NAME --property hw:numa_nodes=1 --property hw:numa_cpus.0=4 --property hw:cpu_policy=dedicated
No, you can use hw:numa_nodes=1 without hw:numa_cpus But I suggest you to drop both --property hw:numa_nodes=1 --property hw:numa_cpus.0=4. This undermines the cloud concept - you are introducing too much control on allocation.
hw:cpu_policy=dedicated should be enough. -Actually by default as I remember it will never allow you to have the VM split over 2 (or more) NUMA
hw:numa_cpus.0=4 sounds wrong: there you specify CPU IDs, not quantity of CPUs.
Specifying CPU IDs explicitly, as I mentioned below makes it less of a cloud.
Asked: 2018-07-12 23:29:49 -0500
Seen: 301 times
Last updated: Aug 13 '18
