> Is this documented somewhere? > > I did a bit of digging and couldn't find anywhere that explicitly > required that for the J->K upgrade. Certainly it was documented for the > I->J upgrade. It's our model, so I don't think we need to document it for each cycle since we don't expect it to change. We may need more general coverage for this topic, but I don't expect the release notes to always mention it. This isn't formal documentation, but it's relevant: http://www.danplanet.com/blog/2015/06/26/upgrading-nova-to-kilo-with-minimal-downtime/ --Dan