它也有一些基本的关联性机制可以让您维护同一后端服务器上的用户。
It also has some basic affinity mechanisms that let you keep users on the same back-end servers.
通过前面所描述的数据绑定机制可以实现该操作，只不过这次实际上是绑定到后端数据元素。
This is done through the data binding mechanism described previously, only this time you are actually binding to backend data elements.
基于子树的分割：按照这种分割机制，每个子树驻留在一个单独的后端目录服务器上。
Subtree-based splitting: in this splitting mechanism, each subtree is configured to reside on a separate directory server in the back end.
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