A significant advantage of using microservices over a monolith architecture is that microservices can be separately scaled to meet the unique traffic demands they serve. A service that must do work for every single request will have very different scaling needs than a service that only needs to perform work for specific kinds of request.
Because microservices encapsulate ownership over a single-domain entity, they can be load tested independently. They can also be configured to scale automatically based on demand. In this chapter, we'll discuss load testing using two different load testing tools and set up auto-scaling groups in AWS that can scale on demand. Finally, we'll discuss strategies for capacity-planning.
