In this chapter, we've built a simple distributed computation application using Storm's core API and covered a large part of Storm's feature set, all without even installing Storm or setting up a cluster. Storm's local mode is powerful in terms of productivity and ease of development, but to see Storm's true power and horizontal scalability, you'll want to deploy applications to a real cluster.

In the next chapter, we'll walk through the process of installing and setting up a clustered Storm environment and deploying topologies in a distributed environment.