On Thu, Oct 24, 2013 at 3:06 PM, Robert Collins <robertc at robertcollins.net>wrote: > On 25 October 2013 10:04, Chris Behrens <cbehrens at codestud.com> wrote: > > > > On Oct 24, 2013, at 1:33 PM, Robert Collins <robertc at 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... > /me runs from room crying > > https://etherpad.openstack.org/p/HavanaNoDowntimeDBMigrations > > -Rob > -- > Robert Collins <rbtcollins at hp.com> > Distinguished Technologist > HP Converged Cloud > > _______________________________________________ > OpenStack-dev mailing list > OpenStack-dev at lists.openstack.org > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.openstack.org/pipermail/openstack-dev/attachments/20131024/9e1ccde7/attachment.html>