If it can identify the correct node, it forwards the request to that node, waits for a response from the node, and returns the data to the client.
如果它可以识别正确的节点，那么它会将请求转发给该节点，等待来自该节点的响应，然后将数据返回给客户端。
Now that we have a two-node setup, let's add a third client node.
现在已经有了两个节点的设置，我们再添加第三个客户机节点。
A node directory is a directory that contains information that is necessary to establish communications from a client workstation to all applicable database servers.
节点(node)目录包含在建立从客户机工作站到所有合适的数据库服务器的通信时所需的信息。
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