AWS Certified Solutions Architect – Associate (SAA-C02) — Question 179

A company is migrating a NoSQL database cluster to Amazon EC2. The database automatically replicates data to maintain at least three copies of the data. I/O throughput of the servers is the highest priority. Which instance type should a solutions architect recommend for the migration?

Answer options

• A. Storage optimized instances with instance store
• B. Burstable general purpose instances with an Amazon Elastic Block Store (Amazon EBS) volume
• C. Memory optimized instances with Amazon Elastic Block Store (Amazon EBS) optimization enabled
• D. Compute optimized instances with Amazon Elastic Block Store (Amazon EBS) optimization enabled

Correct answer: A

Explanation

The correct answer is A because storage optimized instances are specifically designed to provide high I/O throughput necessary for database workloads, which is crucial for maintaining data replication. Options B and C focus on general purpose and memory optimization respectively, which do not prioritize I/O throughput as highly. Option D, while compute optimized, also does not match the storage needs of the NoSQL database as effectively as option A.