Figure 2 shows the high availability cluster after adding logical groups in the sqlhosts file.

图2展示了sqlhosts文件中添加了逻辑组的高可用性集群。

youdao

It can service the user connections while the servers of the high availability cluster are brought down.

它能在高可用性集群的服务器停机时维护用户连接。

youdao

This article focuses on one of those features: upgrading a high availability cluster while it is online.

本文主要关注其中一个特性：在线升级高可用性集群。

youdao