Hi, In our cloud we use 1G huge pages for the instance memory. We started notice that qemu has a relevant memory overhead per domain (something like 300MB per domain). As we use huge pages for the instance memory nova scheduler makes placement decision based on the available huge pages. However in this situation the available host OS memory also needs to be considered. Reserving host OS memory deployment time is not practical as the needed reservation depends on the number of instances that will be run on that host.
Is there any plan in the nova community to use qemu memory overhead in the placement decision in case of huge page backed instance? If there is no plan, do you support the idea adding such feature to nova? Cheers, gibi __________________________________________________________________________ OpenStack Development Mailing List (not for usage questions) Unsubscribe: [email protected]?subject:unsubscribe http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
