Hi I’m new to session storage in the backend. Would you store a session in an agent or something like redis?

It’s advisable to start with an elixir option before considering alternatives. If you don’t get the expected performance from Agents or ETS, then you can try other options.

Agent is basically a GenServer; due to this, concurrent calls are serialized, ETS implementation is quite different allowing concurrent read and write

Like most things in software it’s a matter of tradeoffs. With ETS you’ll get a considerable performance bump when reading sessions (you can also refer to Plug.Session.ETS — Plug v1.20.2 ) if many requests come in from the same user and reference the same agent. And you also won’t have to worry much a…

so which one is the best for storing user sessions

There is Plug.Session to manage this… It can be configured to use ETS or Cookies. Here is official documentation. https://phoenixframework.org/blog/sessions The recommended way is not to use ETS in production.

Elixir Programming Language Forum

Using Agents or redis to store user sessions

Questions & Help Questions

sc4224 July 18, 2019, 3:55pm 3

@kodepett on that note, why would we use ets over agents?