For online businesses, traffic fluctuations are unavoidable and may occur at both predictable and unexpected times. In order to provide a service that is consistently high performance with minimized cost and effort, it is crucial to deploy an architecture that automatically scales in response to traffic volume changes.

This solution allows you to automatically adjust the compute capacity in response to traffic fluctuations; helps you maintain a fine balance between performance and cost using scaling rules; provides high availability and fault tolerance by evenly distributing ECS instances across zones as the compute capacity is scaled; supports database scaling to meet increased data demands; and supports Redis caching across zones to ease the load on the database.