During portfolio assessment, a company's team finds a legacy expense-report tool.
Nobody has logged in for a year, its servers average under 5% CPU use, and the finance director confirms the business no longer needs it. The team wants to stop paying for the tool and its servers.
Which migration strategy should the company apply to this application?
Choose one answer.
AA. Retain, keeping the application where it is for now
BB. Relocate, moving the infrastructure to the cloud at the hypervisor level
CC. Rehost, moving the servers to Amazon EC2 unchanged
DD. Retire, decommissioning the application and removing its servers
Show the answer and explanation
Answer: D
A. Wrong: Retain keeps an application in its current environment, usually because it is not ready to move or has no migration case yet. This tool has no business value, so keeping it would keep paying for unused servers.
B. Wrong: Relocate moves infrastructure to the cloud without buying new hardware or rewriting applications. It would still carry the cost of servers that nobody needs.
C. Wrong: Rehost moves an application to the cloud unchanged. Moving an unused tool would keep paying for its servers in a new location, so this does not stop the cost.
D. Right: Correct. Retire decommissions applications that are no longer needed. The business has confirmed no value, so the company should shut the tool down and stop paying for its servers. Learn more: Paths to the cloud (opens in a new tab)
Explanation
Retire removes applications the business no longer needs, so the company stops paying for their servers. Rehost and relocate would move that cost into the cloud, and retain keeps it in place. Here the business has confirmed the tool has no value, so retiring it is the right step.
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