On 08/02/2013 11:32 AM, Peeyush Gupta wrote: > Hi, > > I am trying to figure out how the filters act based on CPU availability. > I understand there is a RAM filter, which decides the RAM allocation > ratio, so that RAM of a particular host does't get over used. Now, in the > same way CPUs can also be overused, if I keep launching > instances. > > Is there any filter that takes care of that? A filter that can reject a host > if the CPUs are overused. > I think the CoreFilter is what you're looking for: http://docs.openstack.org/trunk/openstack-compute/admin/content/scheduler-filters.html#corefilter Cyril Roelandt.