> What are the performance differences with this approach vs options 1 and > 2? If performance is a major concern, then an event based approach > seems like it could be more efficient. Or is there a reason a poll > approach is needed? IMO metrics like CPU/network utilization information will be more appropriate for polling than notification, because it's depends on the consumer when will such information needed. Similar to instrumentation usage. > > -- > Russell Bryant > > _______________________________________________ > OpenStack-dev mailing list > OpenStack-dev at lists.openstack.org > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev