A logistics firm's data center lease ends in three months, and its servers must move before then.
The team plans to move 40 virtual machines to Amazon EC2 with no changes to code or architecture, and to optimize them later once they are running.
Which migration strategy does this describe?
Choose one answer.
AA. Refactor, rewriting the applications to use cloud-native features
BB. Replatform, making some optimizations as the application moves
CC. Rehost, also called lift and shift, moving the application to the cloud without changes
DD. Repurchase, replacing the application with a different product, often software as a service
Show the answer and explanation
Answer: C
A. Wrong: Refactoring rewrites an application to use cloud-native features. The team plans no code changes, so this strategy is far more work than the deadline allows.
B. Wrong: Replatforming moves an application and introduces some optimization during the move. The plan defers optimization and makes no changes at the move, so this is not the strategy.
D. Wrong: Repurchase switches to a different product, typically a SaaS model. The plan keeps the same virtual machines and software, so it does not replace the product.
Explanation
Rehost, often called lift and shift, moves applications to the cloud without changing their code or architecture. It is the quickest way to leave a data center under a deadline, and optimization can follow later. Refactor, replatform and repurchase all involve changes that the plan does not include.
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