Q46 — AWS SOA-C02 Ch.1

Question 46 of 100 | ← Chapter 1

A company is preparing for a marketing campaign that will increase trac to a new web application. The application uses Amazon API Gateway and AWS Lambda for the application logic. The application stores relevant user data in an Amazon Aurora MySQL DB cluster that has one Aurora Replica. Database queries for the application are 5% write and 95% read. What should a SysOps administrator do to scale the database when trac increases?

• A. Congure Aurora Auto Scaling to add or remove Aurora Replicas in the cluster based on the average CPU utilization of the Aurora Replicas. ✓
• B. Congure Aurora Auto Scaling to increase or decrease the size of the Aurora Replicas based on the average CPU utilization of the Aurora Replicas.
• C. Congure AWS Auto Scaling to monitor the Aurora cluster. Configure AWS Auto Scaling to add or remove Aurora Replicas in the cluster based on the average CPU utilization of the primary instance.
• D. Congure AWS Auto Scaling to monitor the Aurora cluster. Configure AWS Auto Scaling to add or remove Aurora Replicas in the cluster based on the average CPU utilization of the existing Aurora Replica.

Correct Answer: A. Congure Aurora Auto Scaling to add or remove Aurora Replicas in the cluster based on the average CPU utilization of the Aurora Replicas.

Explanation

Amazon Aurora Auto Scaling可根据指标自动调整副本数量以处理读取流量。Aurora Auto Scaling的设计目标即通过监控副本的CPU等指标动态扩缩容（AWS文档）。选项A正确，因基于副本CPU利用率增减副本应对读取负载。选项B错误，调整实例大小而非数量。选项C和D使用AWS Auto Scaling而非专门管理Aurora副本的服务，且依据主实例或单一副本指标不准确。