From Legacy To Event Sourcing

A practical look at moving from a traditional RDBMS to event sourcing on the BEAM, using Elixir's actor-based aggregates and GenServer command processing. Beyond the conceptual case for event sourcing, the talk covers the real-world obstacles teams hit afterwards — long-term storage, scaling, regulations, and the mental shift from mutations to event-driven systems — sharing setup, headaches, and homebrew solutions, with a particular eye on GDPR compliance for persistent, immutable stores.