Mnesia is a distributed database that’s embedded in Erlang and is super-easy to access — you don’t have to rely on a third-party service because it’s already available with your Elixir app. In this article, we want to share how we scaled our Mnesia usage in our different services, how we coupled the performances of Mnesia, and the persistence that was required to deploy our services with multiple nodes running.

https://medium.com/@wttj_tech/elixir-how-to-distribute-mnesia-between-multiple-nodes-cb7c851b1ed1