In the previous posts, we have been using the temporary Erlang Term Storage or ETS to store the data. As this is an in-memory store, any data that is stored is lost whenever the application is stopped.
In this post, we will look to change this and make the data persist between application restarts. To do this we will be using Disc-backed Erlang Term Storage - DETS. This writes the data to a specified file on the disc. For this application using DETS is fine as the data requirements are very small. Should this site take off, then I would recommend using Mnesia.