AWS Certified Solutions Architect – Associate (SAA-C02) — Question 357

A company has a mobile game that reads most of its metadata from an Amazon RDS DB instance. As the game increased in popularity developers noticed slowdowns related to the game's metadata load times. Performance metrics indicate that simply scaling the database will not help. A solutions architect must explore all options that include capabilities for snapshots replication and sub-millisecond response times.
What should the solutions architect recommend to solve these issues?

Answer options

• A. Migrate the database to Amazon Aurora with Aurora Replicas.
• B. Migrate the database to Amazon DyramoDB with global tables.
• C. Add an Amazon ElastiCache for Redis layer in front of the database.
• D. Add an Amazon ElastiCache for Memcached layer in front of the database.

Correct answer: C

Explanation

Amazon ElastiCache for Redis is the ideal choice because it provides sub-millisecond response times and supports advanced features like replication and snapshots (backups). While ElastiCache for Memcached also offers sub-millisecond latency, it lacks support for replication and snapshotting. Migrating to Amazon Aurora or Amazon DynamoDB would require significant migration effort and may not guarantee the sub-millisecond read performance provided by an in-memory caching layer.