- Amazon Elastic Compute Cloud (EC2) is a web service that provides resizeable computing capacity. This flag also enables the following modules: Auto Scaling : Set up dynamic and predictive scaling for scalable AWS resources. Also enables autoscaling-plans and application-autoscaling. EC2 Image Builder : Fully-managed AWS service that makes it easier to automate the creation, management, and deployment of customized, secure, and up-to-date “golden” server images that are pre-installed and pre-configured with software and settings to meet specific IT standards. Elastic File System: EFS provides file storage for Amazon EC2 instances. Savings Plan : Flexible pricing model that helps you save a significant percentage on Amazon EC2 and Fargate usage.