Azure 前门是否主动复制其缓存?

Does Azure front door actively replicate its cache?

一旦对单个 POP 的初始请求完成,AFD 缓存是否会推送/复制到其他 POP?我找不到与此相关的 AFD 文档的任何文档。

最终我想知道的是:

如果初始请求来自 EU,由 EU POP 提供服务(从源服务器拉取后);然后 1 小时后来自美国的相同请求发生,此请求是美国 POP 中的 'cache hit',还是通读未命中?

任何 POP 的第一个请求将不会被缓存。根据您的示例,从美国发送的请求将是 MISS,任何后续请求都将缓存在该 POP 服务器中。

我们在我们的系统上看到了混合行为,下面的摘录解释了 AFD 的工作原理,以及为什么我们会出现混合行为。

Lets say out of out of 100 POPs globally, we have 20 super POPs. The remaining 80 will never reach the API backend directly but will only go to super POPs. And then the Super POPs go to your API to pull the content. There on not just the initial POP but also the super POP now have the cached content. Across the globe the Super POPs keep getting warmed up with the cache content. Each Edge POP has a mapping to a Super POP. This overall helps improve cache hit ration significantly and also significantly reduces the load on your application backends.