What is the primary purpose of a cutover plan in a cloud migration, and what are common strategies used to execute it?

• A. It defines how production workloads switch to the cloud; strategies include blue/green, canary, pilot light, or big-bang.
• B. It documents data retention policies for the migrated systems.
• C. It outlines the budgeting and cost-tracking for cloud services.
• D. It specifies user access control for the new environment.

Answer: (A)

The main idea here is coordinating the switch of production workloads from the current environment into the cloud, including when and how the switch happens, how data stays in sync, how to validate that the new setup works, and how to rollback if anything goes wrong. A cutover plan details the steps to take at go-live, who performs them, the sequence of activities, the timing, downtime expectations, and the exact runbooks for both successful migration and potential recovery.

Common strategies to execute a cloud cutover are designed to balance risk and speed. Blue/green involves running two identical environments—one live (old) and one ready (new)—and switching production traffic from the old to the new with a minimal or controlled downtime window; this makes rollback straightforward by switching back. Canary deployment gradually shifts a small portion of traffic to the cloud, closely monitoring performance and error rates before expanding the shift, which reduces risk of widespread impact. Pilot light keeps only the most critical components running in the cloud, allowing rapid scale to full production if everything looks good, while keeping costs low until full cutover is approved. Big-bang moves all workloads at once, with a single synchronized switch, which can simplify the plan but requires careful coordination and can entail longer downtime.

A solid cutover plan also covers readiness checks, data synchronization details, switch-over steps (such as DNS or load balancer updates), validation criteria, rollback procedures, and stakeholder communication to ensure a smooth transition. Data retention, budgeting, and access control are important topics in their own right, but they aren’t the primary purpose of the cutover plan.