Exam AWS Certified Solutions Architect - Associate SAA-C03 topic 1 question 926 discussion

Compute Optimizer can not optimise fargate tasks.

https://repost.aws/knowledge-center/fargate-spot-termination-notice B is correct as you can use ECS task draining to gracefully handle Spot interruptions.

B is the valid answer. Use Fargate for steady-state tasks to ensure high availability and reliability, and Fargate Spot for burst tasks to handle high traffic at a reduced cost. This combination meets the requirements most cost-effectively. D is wrong because rightsizing alone does not optimize for burst traffic scenarios or reduce costs as effectively as incorporating Fargate Spot.

A - It doesn't address the cost optimization for burst traffic. Rightsizing ensures you're not over-provisioning your baseline resources, but it doesn't provide a mechanism to dynamically scale up with cost-effective Spot instances during traffic spikes. B - The application can scale up quickly with Fargate Spot tasks to handle the increased load, and if a Spot task is interrupted, the remaining Fargate tasks can continue to serve traffic (and the system can try to acquire new Spot capacity). C - Fargate Spot is not recommended for steady-state workloads because it can be interrupted. This would compromise the application’s 24/7 availability. D - Like A, it fails to leverage Fargate Spot for cost savings. Combining Fargate for steady state with Fargate Spot for burst traffic, the 24/7 HA is actually guaranteed.

It's D. Compute Optimizer supports recommendations for Fargate Tasks https://aws.amazon.com/about-aws/whats-new/2022/12/aws-compute-optimizer-amazon-ecs-services-aws-fargate/ Option B and C recommend Spot, but that's not an option since the the question asks for 24x7 availability.

D is right answer. Company desire is 24 * 7. So I think spot should be.

available for 24 * 7, spot is out as it can be interrupted any time.

spots might be interrupted and the questions says it has to be available 24/7, rightsizing addresses the cost optimization point but the spot is so risk so I'll go for D

https://aws.amazon.com/blogs/aws-cloud-financial-management/how-to-take-advantage-of-rightsizing-recommendation-preferences-in-compute-optimizer/ be available 24 hours a day, 7 days a week must be highly available => D

This combination leverages the cost benefits of Fargate Spot for burst traffic while ensuring steady performance with regular Fargate instances.

B is the right answer

B- for short work use spot

B is the right choice, the application must be available 24/7