Supervision trees in Elixir are designed to monitor and manage processes, ensuring fault tolerance by automatically restarting failed processes based on defined strategies.

Supervision trees are a fundamental concept in Elixir's design, aimed at enhancing fault tolerance and process management. A supervision tree is a hierarchical structure where supervisors monitor worker processes. The primary purpose of supervision trees is to ensure that if a worker process crashes, the supervisor can automatically restart it according to predefined strategies, thereby maintaining the system's stability. There are several supervision strategies available, including one-for-one (restarting the failed process), one-for-all (restarting all child processes), and rest-for-one (restarting a failed process and any processes started after it). When designing a supervision tree, it's essential to organize your processes logically to ensure effective monitoring and management. By encapsulating processes within supervision trees, you can create robust applications that can recover from failures without requiring manual intervention. Additionally, this approach promotes the isolation of concerns, making it easier to maintain and extend your codebase. To implement supervision trees in your application, use the Supervisor module to define and start your supervised processes. By leveraging supervision trees, you can build resilient Elixir applications that gracefully handle errors and maintain high availability.