It is: (1) limited capacity of queue; (2) limited service object of each time; (3) Using no limited gate way.

探讨具有如下特征的多站循环服务系统：(1)队列容量有限；(2)每次服务对象受限；(3)实施非门限方式。

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Should load exceed the capacity of the system, messages will queue up irrespective of the maximum messages value.

如果负载超过了系统的容量，则不管最大消息的值是多少，消息都将排队等候。

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Each queue should be loaded up with data requests up to 50 percent of the queue capacity so that one queue fails, the healthy ones take over the data requests originally destined for the failed queue.

每个队列的数据请求负载应该不超过队列容量的50%，这样如果一个队列出现故障，健康的队列可以接管原本发给失败的队列的数据请求。

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