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# 节点
> 为协议网关（access point）、消息队列(message queue)和流处理(stream function)
提供基础服务
## example 例子
### mock_ap
> 定时产生数据发送到 mq1
### mq1
> 作为主节点，级联节点mq2
### mq2
> 作为落地处理节点，上级级联节点mq1
### sf
> 作为数据处理节点，连接到mq2