Introduction to Supervisors
Discover how supervisors automatically restart failed processes, ensuring fault tolerance and high availability in your Erlang applications.
Meet Erlang Supervisors
In Erlang, processes are designed to crash! But who handles the mess? That's where Supervisors come in.
A supervisor is a special Erlang process whose job is to start, stop, and monitor other processes, called its children.
If a child process crashes, the supervisor automatically restarts it. This makes your applications incredibly resilient and fault-tolerant!
Why Fault Tolerance Matters
Imagine a web server process handling user requests. What happens if it crashes due to an error?
- Without a supervisor, the server stops, and users lose service.
- With a supervisor, the crashed process is detected and restarted instantly, often without users even noticing!
This "let it crash" philosophy, combined with supervisors, is key to Erlang's legendary reliability.
All lessons in this course
- Understanding OTP & Behaviors
- Implementing GenServer Behavior
- Introduction to Supervisors
- Building OTP Applications & Releases