该模式中，节点和叶子的角色被添加到已有的组件上，并且它们都需要知道自己在实现组件接口时的职责。
In this pattern, the node and leaf roles are superimposed on existing components, and both need to know their responsibility in implementing the component interface.
运行时模式代表了主要的中间层节点、它们的角色以及它们之间的接口。
Runtime patterns represent the major middle-tier nodes, their roles, and the interfaces between them.
这两个组在安装过程中用来确保执行存储节点角色的服务器可以接收特定的二进制文件和配置文件，这在下面会详细进行介绍。
These groups are used during installation to ensure servers that perform storage node roles receive specific binary files and configuration files, which are detailed below.
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