AWS Certified Solutions Architect - Associate
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How should a solutions architect maintain optimal CPU utilization at 40% for an application running on EC2 instances in an Auto Scaling group with an Application Load Balancer across multiple Availability Zones?
How should a solutions architect maintain optimal CPU utilization at 40% for an application running on EC2 instances in an Auto Scaling group with an Application Load Balancer across multiple Availability Zones?
Explanation:
The correct answer is B: Utilize a target tracking policy for the Auto Scaling group. A target tracking policy is designed to keep a specified metric (in this case, CPU utilization) at a target value by dynamically adjusting the number of instances in the Auto Scaling group to maintain optimal performance. Option A (simple scaling policy) and Option D (scheduled scaling) are less responsive to real-time changes in workload, and Option C (AWS Lambda) is a more complex approach that isn't necessary for this use case.