As you add microservices to your stack, the number of connections follows Metcalfe’s law. In the simplest case, there’s just a single connection between two services. As you reach five services, connections can happen in 10 different ways. A stack with twenty services has 190 possible connections. The complexity of managing, supporting, and understanding those connections is something you should consider as your stack grows.
Have you ever faced complexity in microservices yourself? Learn more about it with this presentation about Asynchronous Microservices.