The paper analyzes the characters of the HA technology, cleans up the basic structure arrangement of the HA system, and gives the brief introduction of several important roles in the existing model.

• 本文首先从分析高可用技术的特点入手,理清了高可用系统的基本结构层次,并对现有模型的几个重要角色及其操作进行了简介。