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kafka如何保证吞吐量和速度：https://zhuanlan.zhihu.com/p/120967989#:~:text=Kafka%E9%80%9F%E5%BA%A6%E7%9A%84%E7%A7%98%E8%AF%80%E5%9C%A8%E4%BA%8E,%E9%85%8D%E5%90%88sendfile%E7%9B%B4%E6%8E%A5%E6%9A%B4%E5%8A%9B%E8%BE%93%E5%87%BA%E3%80%82