Q83 — AWS SAA-C03 Ch.4

Question 83 of 105 | ← Chapter 4

Q278. An ecommerce company is running a multi-tier application on AWS. The front-end and backend tiers both run on Amazon EC2. and the database runs on Amazon RDS for MySQL. The backend tier communicates with the RDS instance. There are frequent calls to return identical datasets from the database that are causing performance slowdowns. Which action should be taken to improve the performance of the backend?

• A. Implement Amazon SNS to store the database calls.
• B. Implement Amazon ElastiCache to cache the large datasets. ✓
• C. Implement an RDS for MySQL read replica to cache database calls.
• D. Implement Amazon Kinesis Data Firehose to stream the calls to the database.

Correct Answer: B. Implement Amazon ElastiCache to cache the large datasets.

Explanation

ElastiCache for Redis can be used as a primary in-memory key-value data store, providing fast, sub millisecond data performance, high availability and scalability up to 250 nodes and 250 shards, giving you up to 170.6 TB of in-memory data.