Mirantis Field CTO Ryan Day recently sat down to demonstrate how users can use Mirantis DriveTrain to upgrade OpenStack over two versions, from Mitaka to Ocata.  Along the way, he answered a number of different questions about how it works, and what DriveTrain is all about.  You can view the entire demonstration, and we've decided to provide the answers here …

Instead of large integrated releases after every OpenStack Foundation release, MCP DriveTrain enables you to consume some or all of the latest innovation without downtime.