1.简介前面的文章说了缓冲区，说了通道，本文就来说说NIO中另一个重要的实现，即选择器Selector。在更早的文章(https://www.oschina.net/action/GoToLink?urlhttp%3A%2F%2Fwww.coolblog.xyz%2F2018%2F02%2F08%2FIO%25E6%25A8%25A

NioEventLoopGroup继承层次结构图Netty4的NioEventLoopGroup(https://www.oschina.net/action/GoToLink?urlhttp%3A%2F%2Fnetty.io%2F4.0%2Fapi%2Fio%2Fnetty%2Fchannel%2

Linux使用FIO测试磁盘的IOPSFIO安装wgethttp://brick.kernel.dk/snaps/fio2.2.5.tar.gztarzxvffio2.2.5.tar.gzcdfio2.2.5./configurem