CLF-C02 Practice Question 72: Repurchase Strategy
AWS Certified Cloud Practitioner (CLF-C02) · Test 8 · question 2 of 10
A company runs a self-managed customer relationship management (CRM) application on its own servers, and pays for both the software licenses and the hardware. As part of its move to the cloud, it decides to stop running the application altogether, move its users and data to a commercial software as a service (SaaS) CRM product, and shut down the old servers. Which migration strategy is this?
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Answer:
Repurchase, also known as *drop and shop*, replaces an application with a different version or product. The most common use case AWS gives is moving from a traditional license to SaaS, which removes the burden of managing and maintaining the infrastructure and helps reduce licensing issues. After buying the new product, the company migrates its data and trains its users, and the old application stack is no longer needed.
Option A, rehost ("lift and shift"), moves the existing application to AWS *without changing it*, so the company would still run and license its own CRM. Option B, replatform ("lift, tinker and shift"), also keeps the application but makes some optimizations along the way, such as moving its database to a managed service. Option D, relocate, moves a large number of servers from an on-premises platform to a cloud version of that platform, or moves resources to another VPC, Region or account, again without replacing the application.
Reference: About the migration strategies