SOA-C02 Question 292
Select 3Your organization runs an application on Amazon EC2 instances behind an Application Load Balancer (ALB). The application experiences fluctuating traffic patterns, with high spikes during certain hours of the day. To optimize costs without compromising performance, which actions should you take?
- A
Implement Auto Scaling with a dynamic scaling policy for the EC2 instances.
- B
Use Spot Instances for all EC2 instances in the Auto Scaling group.
- C
Configure Elastic Load Balancer access logs to analyze traffic patterns.
- D
Use Reserved Instances for the EC2 instances in the Auto Scaling group.
- E
Leverage AWS Compute Savings Plans for predictable workloads.
Show answer and explanation
Correct answers: A, C, E
Explanation
To optimize costs and performance for an application with fluctuating traffic, a combination of Auto Scaling with a dynamic scaling policy and Elastic Load Balancer access logs ensures the application scales effectively while providing insights into traffic patterns. AWS Compute Savings Plans can further help reduce costs for predictable portions of the workload without being tied to specific instance types. Spot Instances and Reserved Instances, while cost-effective in specific scenarios, are less suitable for workloads with unpredictable traffic spikes.
- A. Correct.
Implementing Auto Scaling with a dynamic scaling policy allows the EC2 instances to scale in or out based on traffic patterns, effectively managing costs and maintaining performance. This is a key optimization strategy.
- B. Incorrect.
Using Spot Instances for all EC2 instances can reduce costs but is not ideal for applications with unpredictable traffic since Spot Instances can be interrupted. This could compromise performance during traffic spikes.
- C. Correct.
Configuring Elastic Load Balancer access logs enables you to analyze traffic patterns, which is crucial for understanding and optimizing both cost and performance.
- D. Incorrect.
Using Reserved Instances requires a long-term commitment and is most suitable for consistent, predictable workloads. This is not ideal for workloads with fluctuating traffic patterns.
- E. Correct.
AWS Compute Savings Plans provide flexibility in cost optimization by allowing discounts for predictable compute usage, regardless of instance type, making it an effective choice for workloads with partial predictability.