AWS Certified DevOps Engineer - Professional DOP-C02

By Amazon · Question Mode

QuestionQ18

Resilient Cloud Solutions

A company used a lift-and-shift approach to migrate a workload to AWS. The company has an Auto Scaling group of Amazon EC2 instances. Each EC2 instance hosts a web application, a database, and a Redis cache.

Users are seeing substantial variation in the web application's response times. Requests to the web application are routed to one EC2 instance that is experiencing significant load. The company wants to separate the application components to improve availability and performance.

Which solution will satisfy these requirements?

Explanation

An Application Load Balancer distributes HTTP(S) requests across independently scaled web application instances. An Aurora Multi-AZ configuration provides database resiliency, while an Amazon ElastiCache for Redis OSS cluster separates caching into a managed cache tier that can be configured for high availability. This removes the web, database, and cache components from the same EC2 instances and prevents a single overloaded web instance from serving all application traffic.

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