Each ER node may be a single server or a cluster of servers, which this article further discusses below.
每个 ER 节点 可能是一个单个服务器或一个服务器集群，本文后面将介绍到。
The following configuration sets up a machine for each node in the Business Event nodes running under an Application Server ND cluster, along with a single passive machine.
以下配置为运行在 Application Server ND 集群之下的每个 Business Event 节点建立了一个实例，附带为集群的每个节点建立一对被动机。
However, in this case it is extended to support a cluster environment instead of an environment with a single application server node.
然而，本例用于支持集群环境而不是单个应用服务器节点。
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