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

StayBooker, a hotel reservation platform, is planning to migrate its applications to the AWS Cloud. The migration team has identified two specific workloads:

1. An on-premises employee payroll processing application that they want to completely replace with a commercial cloud-hosted software-as-a-service (SaaS) subscription.
2. A legacy mainframe application that cannot be migrated to the cloud at this time due to complex hardware dependencies, which they must keep running in their on-premises environment.

Which two of the following migration strategies represent the correct approach for these workloads?

  1. RepurchasingAnswer
  2. RetainingAnswer
  3. C
    Rehosting
  4. D
    Replatforming
  5. E
    Refactoring

Answer

The correct migration strategies are Repurchasing and Retaining.
Repurchasing is the correct strategy for the payroll application because it involves replacing the custom system with a commercially available SaaS solution. Retaining is the correct strategy for the legacy mainframe because it keeps the application in the on-premises environment due to constraints preventing migration.

Step-by-Step Solution

1
Analyze the first workload: replacing an on-premises payroll application with a SaaS subscription.
This matches the 'Repurchasing' strategy, which is often referred to as drop-and-shop.
Replacing existing applications with commercial SaaS options is the defining feature of Repurchasing.
2
Analyze the second workload: keeping a legacy mainframe application on-premises due to hardware dependencies.
This matches the 'Retaining' strategy.
Keeping applications in their source environment because they cannot be migrated yet is classified as Retaining.

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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