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=== Supervisor Hierarchy === One of the cornerstone features of fault-tolerance in Elixir is the concept of supervision. A supervisor is a process that monitors and controls the lifecycle of other processes, known as workers. Elixir provides a robust supervisor hierarchy, where supervisors can monitor and supervise other supervisors, creating a tree-like structure. Whenever a worker process fails, the supervisor is notified and can take appropriate actions, such as restarting the worker, terminating it, or initiating a different recovery strategy. This hierarchical supervision structure allows for the automatic restart of failed processes, making the system resilient to faults and errors.
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