当我们需要把服务器某个目录到远程服务器的时候，比如你把docker数据挂载到本地，但是还不放心，担心服务器挂了或被人攻击，毕竟自己玩的话一般就只有一个服务器，如果挂掉了自己上面的啥都没了，那多糟心，你可能会想，能不能把我的数据挂载到另一台远程服务器上呢，不能两台同时攻击吧，有点分布式系统的感觉了，也就是常说的容灾容错啥的。
Is a minor in computer science hard? Honestly, while it’s going to depend on you, the biggest single factor I have seen in success vs. failure in CS minors is do you enjoy programming? A typical CS minor is 4–7 courses, and that will almost always include an intro programming course and a course on data structures. Figure half of the coursework will be focused on learning programming.
