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Difficulty: MediumUnderstand the benefits of and strategies for migration to the AWS Cloud

Polaris Energy needs to migrate its on-premises legacy forecasting application to AWS within a very tight deadline of two weeks due to an upcoming data center lease expiration. The application's architecture is complex, and the IT team does not have the time or resources to make any code or configuration changes. Which of the following migration strategies should Polaris Energy use to meet this requirement?

  1. A
    Refactoring
  2. B
    Replatforming
  3. RehostingAnswer
  4. D
    Retaining

Answer

Rehosting
Rehosting (commonly referred to as 'lift-and-shift') is the migration strategy that involves moving applications to the AWS Cloud without modifying their code or configuration. It is the fastest strategy to execute, making it ideal for tight timelines such as an upcoming data center lease expiration.

Step-by-Step Solution

1
Analyze the business and technical constraints of the migration scenario.
The migration has two main constraints: a tight two-week deadline driven by a lease expiration, and a requirement to make zero code or configuration changes.
Understanding constraints narrows down the options among the 6 Rs migration strategies.
2
Evaluate the 6 Rs migration strategies against these constraints.
Rehosting, also known as lift-and-shift, allows moving applications to AWS without modification, making it the most suitable strategy to meet the tight deadline.
Selecting the strategy that minimizes effort, risk, and time.

Key Concept

AWS Cloud Migration Strategies (6 Rs)
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Topics

Understand the benefits of and strategies for migration to the AWS Cloud

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