A media company hosts a high-throughput video transcoding platform on Amazon EC2 instances in an Auto Scaling Group (ASG) behind an Application Load Balancer (ALB). The EC2 instances reside in private subnets across three Availability Zones. During video upload surges, the system encounters two critical issues: first, newly launched EC2 instances require minutes to download dependencies and complete their bootstrapping sequence, while the scaling policy cooldown is set to minutes, resulting in rapid, unnecessary scale-out (thrashing) of instances. Second, when the single NAT Gateway deployed in Availability Zone A experiences network degradation, transcoding instances in all three Availability Zones fail to access the internet to retrieve dependencies, halting the processing pipeline. Which of the following combinations of actions will resolve these issues? (Select TWO.)
- Deploy a dedicated NAT Gateway in each Availability Zone where the EC2 instances reside, and update the route tables of the private subnets to direct outbound traffic () to the respective local NAT Gateway.Answer
- Update the Auto Scaling group launch template to use a pre-baked AMI containing the transcoding dependencies, and set the default cooldown and instance warmup periods to exceed the remaining bootstrapping time.Answer
- CConsolidate all outbound internet routing by deploying a single high-bandwidth NAT Gateway in a shared services VPC and routing private subnet traffic to it over an AWS Transit Gateway.
- DConfigure the Auto Scaling group cooldown period to seconds to ensure that the target tracking scaling policy immediately triggers subsequent scale-out actions to handle transcoding load surges.
- ESubmit an AWS Support request to enable pre-warming for the Application Load Balancer to ensure it automatically bypasses the bootstrapping sequence during rapid instance scale-out events.