Your operations team copies an existing on-premises payroll application to Compute Engine virtual machines with no changes to the application code or operating system. Which migration approach is this?
Replatform (move and improve)
Rehost (lift and shift)
Refactor
Retire
Moving a workload to cloud-hosted virtual machines without altering the application or its runtime environment is called rehosting, often nicknamed "lift and shift". Replatforming (move and improve) involves small optimizations such as swapping the database for a managed service. Refactoring requires significant code changes to take advantage of cloud-native capabilities. Retiring removes the workload altogether. Because the scenario specifies an unchanged application and OS, rehosting is the correct classification.
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