Real-Time Phoenix

Use Channels in a Cluster

It is critical to run multiple servers when you are deploying a production application. Doing so provides benefits for scalability and error tolerance. For example, the ability to double the number of servers in the event of higher load is much more powerful than doubling the number of cores on the single server. It can take a few minutes (or less!) to add more machines but could take much longer to move the application to a different machine with more cores. There may also be a time when a single machine is fully utilized, and you cannot add more CPU cores or memory.

Elixir makes connecting a cluster of BEAM nodes very easy. However, we have to ensure that we’re building our application to run across multiple nodes ...