Adding a new feature to a software system sometimes requires making a breaking change in a database schema or API schema. Deploying such code changes, where the previous version of your software is not compatible with the new version, can be challenging. The easiest way to roll out a breaking change is in a “big bang” - change both sides of the system all in one go. However, this option requires taking downtime during a deployment, and isn’t possible at all if you don’t have extremely...
