AWS Certified Solutions Architect - Professional SAP-C02

By Amazon · Question Mode

QuestionQ4

Continuous Improvement for Existing Solutions

A company’s solutions architect is assessing an AWS workload that was deployed several years ago. The application tier is stateless and operates on one large Amazon EC2 instance launched from an AMI. The application stores its data in a MySQL database running on a single EC2 instance.

CPU utilization on the application-server EC2 instance frequently reaches 100%, causing the application to become unresponsive. The company installs instance patches manually, and patching has previously caused downtime. The company must make the application highly available.

Which solution meets these requirements with the LEAST development time?

Explanation

An Application Load Balancer distributing traffic to smaller EC2 instances in an Auto Scaling group provides horizontal scaling and high availability for the stateless application tier; a CPU-based scaling policy adds capacity as utilization rises. AWS Systems Manager, using SSM Agent, supports automated patch management. Amazon Aurora MySQL maintains MySQL compatibility while providing resilient storage across Availability Zones and automatic failover options, avoiding the substantial application and data-model changes required by Lambda, containers, DynamoDB, DocumentDB, or Neptune.

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