On 25 October 2013 10:04, Chris Behrens <cbehr...@codestud.com> wrote: > > On Oct 24, 2013, at 1:33 PM, Robert Collins <robe...@robertcollins.net> wrote: > >> -2 to 10 minute downtimes. >> >> +1 to doing the evolution gracefully. There is a spec for doing that >> from the H summit; someone just needs to implement it. > > +1. IMO, we need to move to a model where code can understand multiple > schemas and migrate to newer schema on the fly. The object code in nova will > be able to help us do this. Combine this with some sort of background task > if you need to speed up the conversion. Any migrations that need to run > through all of the data in a table during downtime is just not going to scale. > > I am personally tired of having to deal with DB migrations having to run for > 1 hour during upgrades that happened numerous times throughout the Havana > development cycle.
We had a clear design at the H summit, and folk committed to working on it (Johannes and Mark W); not sure what happened... https://etherpad.openstack.org/p/HavanaNoDowntimeDBMigrations -Rob -- Robert Collins <rbtcoll...@hp.com> Distinguished Technologist HP Converged Cloud _______________________________________________ OpenStack-dev mailing list OpenStack-dev@lists.openstack.org http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
