data-engineer video for a data engineer is managing a highly available web application running on Amazon EC2 instances behind an Elastic Load Balancer (ELB).
A data engineer is managing a highly available web application running on Amazon EC2 instances behind an Elastic Load Balancer (ELB). The traffic is dynamic, with high peaks during business hours and minimal traffic during off-hours. The engineer needs to optimize both cost and performance while maintaining availability. Which of the following solutions will BEST meet these requirements?