What is a benefit of using AWS Auto Scaling?

AWS Auto Scaling is designed specifically to optimize resource usage based on the variable demands placed on an application. The primary benefit of using Auto Scaling is its ability to automatically adjust the number of Amazon EC2 instances in response to fluctuations in traffic or workload. This ensures that applications maintain performance while keeping costs in check by launching additional instances during peak times and terminating them when they are no longer needed.

This dynamic scaling capability allows for seamless management of workload changes, ensuring that sufficient resources are available to handle user demands without over-provisioning. The result is improved efficiency and performance, as the infrastructure adapts in real-time to actual needs rather than static predictions.

Other options do not align with the core functionalities of AWS Auto Scaling. Increasing storage capacity automatically pertains to storage services rather than instance scaling. Database replication is a function of database management systems, not directly related to the scaling of EC2 instances. Facilitating cloud migration is more focused on tools and services that assist with transferring applications and data to AWS, rather than the scaling of existing resources.