cool cool. we'll work against that. i want to point out we added a caching mechanism in Juno which i hope helps with the Nova issue -- basically we cache some of the secondary calls we make when gathering information. https://github.com/openstack/ceilometer/commit/4863fc95bcbbb6f7dbe7e48ef13f370456611738 cheers, gord ---------------------------------------- > From: Tim.Bell at cern.ch > To: openstack-dev at lists.openstack.org > Date: Wed, 27 May 2015 18:53:44 +0000 > Subject: Re: [openstack-dev] [ceilometer][all] Scalable metering > > > We've noticed the load on the Nova and Keystone APIs. It may well be that there is an increased load on the hypervisor but this is distributed and thus we might not have seen it. The API impact was significant.... a factor of 14x increase in API call rate (http://openstack-in-production.blogspot.de/2014/03/cern-cloud-architecture-update-for.html) > > Tim > >> -----Original Message----- >> From: gordon chung [mailto:gord at live.ca] >> Sent: 27 May 2015 20:43 >> To: OpenStack Development Mailing List not for usage questions >> Subject: Re: [openstack-dev] [ceilometer][all] Scalable metering >> >> >>> >>> So I agree doing lots of naive polling can lead to issues on even the >>> fastest of APIs, but are there any bugs about this that were opened >>> against nova? At the very least nova should investigate why the >>> specific calls are so slow and see if we what we can do to make them >>> at least a little faster and lighter weight. >>> >>> >> >> good question. Tim, i was also wondering, is the big issue the load on the nova >> api or the hypervisor? i'm just trying out a solution that might help regarding the >> former. >> >> cheers, >> _________________________________________________________________ >> _________ >> OpenStack Development Mailing List (not for usage questions) >> Unsubscribe: OpenStack-dev-request at lists.openstack.org?subject:unsubscribe >> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev > > __________________________________________________________________________ > OpenStack Development Mailing List (not for usage questions) > Unsubscribe: OpenStack-dev-request at lists.openstack.org?subject:unsubscribe > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev