Supervisors and Application Structure

In concurrent applications, things can go wrong. Processes might crash due to unexpected errors or external issues.

Fault tolerance is the ability of a system to continue operating even when components fail. Elixir embraces a "let it crash" philosophy, meaning instead of trying to prevent every single crash, it focuses on gracefully recovering from them.

This is where Supervisors come in! A supervisor is a special kind of process designed to monitor other processes (its "children").

• If a child process crashes, the supervisor automatically restarts it.
• This ensures your application remains stable and available.
• Supervisors form the backbone of fault-tolerant Elixir applications.