Azure服务总线:什么是“请求"和“消息"? [英] Azure Service Bus: What's a 'request' and a 'message'?

问题描述

在Microsoft Azure的服务总线下，您可以查看不同队列/主题等的活动图.

In Microsoft Azure, under service bus, you can see activity graphs for the different queues/topics etc.

该图显示了各种不同的行，例如传入消息，传出消息，成功请求等.

The graph shows various different lines, such as incoming messages, outgoing messages, successful requests etc.

什么是请求?什么是消息?

What is a Request? And what is a Message?

请求似乎一直在发生，并且通常比消息的数量(在主题中)大得多.即使侦听队列的服务器数量保持不变-有时请求的数量也会急剧增加，而不会看到消息的数量发生任何变化.

Requests seem to be constantly occurring and often significantly large than the number of messages (in topics). Even though the number of servers listening to the queue remains the same - sometimes the number of requests will dramatically increase without seeing any change in the number of messages.

推荐答案

我假定，请求是对队列/订阅的轮询，即使这并未导致消息被拉出.使用OnMessage消息泵模型，您通常会永远"等待直到消息到达，从而导致接收和接收消息的数量相等.消息.但是，当您的角色/线程/泵停止并重新启动时，即使没有找到消息，这也会触发新的接收.

I assume that a request is a poll on a queue / subscription, even if that didn't result in a message being pulled. With the OnMessage message pump model , you typically wait 'forever' until a message arrives, resulting mostly in an equal number of receives & messages. But when your role/thread/pump stops and restarts, that will trigger a new receive, even if no message was found.

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