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practice/circuit-breaking.html-这一章节似乎在讲限流，并不是熔断 #348

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jason-i-vv opened this issue Jul 14, 2021 · 0 comments

jason-i-vv commented Jul 14, 2021 •

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在 DestinationRule 配置中，我们定义了 maxConnections: 1 和 http1MaxPendingRequests: 1。这些规则意味着，如果并发的连接和请求数超过 1 个，在 istio-proxy 进行进一步的请求和连接将被阻止。于是，当我们并发数为 30 时，成功率只有 1/30，也就是 3.3% 左右。

熔断，按照我的理解，要体现断，体现上游服务被摘除，一旦熔断触发，一定时间的窗口期内，该上游服务都不会接收到请求；

如果是发出的请求，有1/30是成功的，那说明链路是通的，这叫限流，不叫熔断吧？如果上游服务由于内部故障导致响应一直超时，那么只要不熔断，下游服务就会被拖慢，限流解决不了这个问题。

个人见解，盼解惑！

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