A company's finance department uses a legacy accounting system that is stable, meets all regulatory compliance requirements, and is not a candidate for cloud migration at this time due to high migration costs and no compelling business driver. The IT manager decides to leave the system running on-premises. Which of the following application migration strategies does this decision represent?
The 'Retain' strategy involves making a conscious decision to keep an application in its current environment, often because it meets business and regulatory needs and the cost or effort of migration is not justified. 'Rehost' (lift-and-shift) involves moving the application to the cloud with minimal changes. 'Replatform' involves making some optimizations for the cloud environment, and 'Refactor' (or re-architect) involves significantly rebuilding the application for the cloud. Since the decision is to leave the system as-is on-premises, 'Retain' is the correct strategy.
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What factors typically determine whether a company uses the 'Retain' strategy for an application migration?
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How does the 'Retain' strategy differ from 'Rehost' and 'Replatform' in terms of effort and cost?
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Why might regulatory compliance influence the decision to use the 'Retain' strategy?