存在一个构建时任务以创建备用环境，以及一个运行时任务以在主节点和辅助节点之间切换。

There is a build time task to create the standby environment and run time tasks to toggle between the primary and secondary nodes.

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该公司还将提供辅助支持设备、备用零部件和维修以及后勤支持。

The company also will supply ancillary and support equipment, spare and repair parts, and logistics support.

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本文假设集群中有两个节点，Node1 是主节点，Node2 是故障转移/接管/备用/辅助节点，见图 1。

This article assumes that we have a two-node cluster with Node1 as the primary node and Node2 as the failover/fallover/takeover/stand-by/secondary node, as shown below in Figure 1.

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