Migration Diary: Run the Cutover in Shadow Mode Before You Cancel the Old Plan

Cancel the old plan only after a shadow window has replayed your real traffic through the new path and the diff report came back boring. A fixture suite proves that the new stack can answer questions you already knew how to ask; shadow traffic proves it survives the ones your users actually sent last week. In this diary entry I want to show you... Weiterlesen: Migration Diary: Run the Cutover in Shadow Mode Before You Cancel the…