1. Overview
1 Overview
The OTP design principles define how to structure Erlang code in terms of processes, modules, and directories.
1.1 Supervision Trees
A basic concept in Erlang/OTP is the supervision tree. This is a process structuring model based on the idea of workers and supervisors:
- Workers are processes that perform computations, that is, they do the actual work.
- Supervisors are processes that monitor the behaviour of workers. A supervisor can restart a worker if something goes wrong.
- The supervision tree is a hierarchical arrangement of code into supervisors and workers, which makes it possible to design and program fault-tolerant software.
In the following figure, square boxes represents supervisors and circles represent workers:
Figure 1.1: Supervision Tree登录查看完整内容
