Definition
The 6 Rs of migration, sometimes referred to as the Seven Rs, is a strategic framework used in cloud computing to categorize different approaches for moving applications and data to the cloud. These strategies include Rehost, Replatform, Repurchase, Refactor, Retire, and Retain, each offering a distinct path based on business needs and technical feasibility. In practice, selecting the appropriate R guides the entire migration process, influencing cost, complexity, and the ultimate benefits realized. Understanding these options is crucial for optimizing cloud adoption, ensuring that the chosen method aligns with organizational goals and minimizes potential pitfalls. For instance, a company might choose to Rehost a legacy application by simply moving it to a cloud server without modification, whereas Refactoring involves rewriting the application to take full advantage of cloud native services. A common point of confusion is the distinction between Replatforming, which involves minor changes to leverage cloud benefits, and Refactoring, which entails significant architectural redesign. This framework is frequently encountered in cloud security certifications like CCSP and AWS certification exams.