A company is migrating an online marketplace application from a mainframe system to an Auto Scaling group of Amazon EC2 instances. The EC2 instances access an Amazon Aurora cluster. The application…

Question

Options

• AUse an Amazon ElastiCache (Redis OSS) cluster to serve transaction and query results.
• BUse an Amazon CloudFront distribution with an Amazon S3 bucket as the origin to cache the
• CUse an Amazon ElastiCache (Memcached) cluster to serve transaction and query results.
• DUse an Amazon ElastiCache (Redis OSS) cluster to cache the transactions. Add an Amazon EC2

• A
  75% (30)
• B
  8% (3)
• C
  15% (6)
• D
  3% (1)

Explanation

Why Option A is Correct: ElastiCache for Redis: Provides persistent, scalable caching for in-progress transactions and SQL queries. Redis supports data durability and advanced features, making it suitable for transactional workloads. Integration with Aurora: Easily integrates with the Aurora cluster to improve query performance. Why Other Options Are Not Ideal: Option B: CloudFront and S3 are unsuitable for transactional caching. EC2 instance store volumes are ephemeral and lack persistence. Option C: Memcached does not offer persistence or advanced transactional support, unlike Redis. Option D: Combining Redis with EC2 instance store is unnecessary; Redis alone meets all caching requirements.

No community discussion yet for this question.