I'd highly recommend using all UTC timestamps. The daylight savings time craziness alone is a good reason for this. Plus issues of distributed systems that may physically span multiple timezones. On Nov 1, 2012, at 10:00 PM, John Tran wrote: > Looking over https://bugs.launchpad.net/ceilometer/+bug/1048647, we'd > like some feedback on timezone aware datetimes for the timestamp > fields (in Meters and Resources tables). From what I understand, some > backends do not support timezone in timestamp type fields , such as > MongoDB and Postgres. I think the way Nova handles it is that it > expects all timestamps in the database is expected to be UTC. > > _______________________________________________ > OpenStack-dev mailing list > OpenStack-dev at lists.openstack.org > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev