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Answer: Use Amazon EC2 Reserved Instances for the application layer and Amazon Aurora Reserved for data storage.
The most cost-effective approach to migrating a continuously operating legacy application with growing database storage to AWS Cloud would be to use Amazon EC2 Reserved Instances for the application layer and Amazon Aurora Reserved Instances for the data storage layer. Reserved Instances provide a significant discount compared to On-Demand Instances for applications that run 24/7. Aurora is a cost-effective and highly-performant database solution. Migrating to Aurora Reserved Instances ensures predictable costs and scalability for the growing database storage requirements, making Option C the correct answer.
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How should a solutions architect migrate a continuously operating legacy application with increasing database storage from an on-premises data center to AWS Cloud in the most cost-effective manner?
A
Use Amazon EC2 Spot Instances for the application layer and Amazon S3 for data storage.
B
Use Amazon EC2 Reserved Instances for the application layer and Amazon RDS On-Demand for data storage.
C
Use Amazon EC2 Reserved Instances for the application layer and Amazon Aurora Reserved for data storage.
D
Use Amazon EC2 On-Demand Instances for the application layer and Amazon RDS Reserved for data storage.
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