AWS Certified Cloud Practitioner (CLF-C02)Cloud ConceptsMedium
A company wants to migrate an application to AWS as quickly as possible with minimal code changes, moving it 'as-is' onto EC2 instances to meet an urgent deadline. Which of the 7 Rs migration strategy does this describe?
- ARefactor
- BRehost
- CRetire
- DRepurchase
Show answer & explanationAnswer & explanation
Correct answer: B. Rehost
Rehost, often called 'lift and shift,' involves moving an application to the cloud with little or no modification, which is ideal for fast migrations under tight deadlines.
Why the other options are wrong
- A. Refactor involves re-architecting the application to take advantage of cloud-native features, which takes more time.
- C. Retire means decommissioning an application that is no longer needed.
- D. Repurchase means switching to a different product, such as replacing with a SaaS solution.
Rehost (Lift and Shift)
A migration strategy where an application is moved to the cloud with minimal or no modification to the code or architecture.
- Fastest of the 7 Rs migration strategies
- Ideal for tight deadlines or large-scale migrations
- Part of AWS's 7 Rs migration strategies framework
Memory trick: Lift the box, shift it to the cloud—Rehost.