C10k 問題：只是面對單一server 需要面對1萬個client k的問題

https://medium.com/@chijianqiang/程序员怎么会不知道-c10k-问题呢-d024cb7880f3

http://inspiregate.com/internet/host-setting/434-unix-c10k-problem-and-libevent-introduction-to-libraries.html