🔗 Building distributed systems in Elixir: Part 5 — Supervisor from scratch

In the latest installment of his series, the article breaks down how to create a supervisor from scratch in Elixir, emphasizing the concepts of process links and exit signals. The author illustrates the implementation of a manual supervisor managing two worker processes, highlighting its ability to restart failed workers without affecting healthy ones. The restart policy is simplified to focus only on abnormal exits, mimicking some of the mechanisms provided by OTP without using its built-in features. Through concrete examples, the piece clarifies how to track child processes and respond appropriately to crashes while maintaining the system's resilience. This hands-on approach aids in understanding distributed systems, making the complexities of supervision more approachable for Elixir developers.