AWS Certified Solutions Architect – Professional (SAP-C02) — Question 510
An events company runs a ticketing platform on AWS. The company’s customers configure and schedule their events on the platform. The events result in large increases of traffic to the platform. The company knows the date and time of each customer’s events.
The company runs the platform on an Amazon Elastic Container Service (Amazon ECS) cluster. The ECS cluster consists of Amazon EC2 On-Demand Instances that are in an Auto Scaling group. The Auto Scaling group uses a predictive scaling policy.
The ECS cluster makes frequent requests to an Amazon S3 bucket to download ticket assets. The ECS cluster and the S3 bucket are in the same AWS Region and the same AWS account. Traffic between the ECS cluster and the S3 bucket flows across a NAT gateway.
The company needs to optimize the cost of the platform without decreasing the platform's availability.
Which combination of steps will meet these requirements? (Choose two.)
Answer options
- A. Create a gateway VPC endpoint for the S3 bucket.
- B. Add another ECS capacity provider that uses an Auto Scaling group of Spot Instances. Configure the new capacity provider strategy to have the same weight as the existing capacity provider strategy.
- C. Create On-Demand Capacity Reservations for the applicable instance type for the time period of the scheduled scaling policies.
- D. Enable S3 Transfer Acceleration on the S3 bucket.
- E. Replace the predictive scaling policy with scheduled scaling policies for the scheduled events.
Correct answer: A, E
Explanation
Creating a gateway VPC endpoint for Amazon S3 eliminates NAT gateway data transfer charges by routing S3 traffic internally within the AWS network, which reduces costs without affecting availability. Additionally, since the company already knows the exact schedules of the events, implementing scheduled scaling policies is more precise and cost-effective than a predictive scaling policy. Other options, such as using Spot Instances with equal weight, could compromise availability during peak events, while S3 Transfer Acceleration is unnecessary for intra-region traffic and would increase costs.