近几年接触了一些C++大型项目，其中不乏有很优秀的代码，但也有不少代码在实现的时候缺少极致深度思考，导致代码的安全性，可读性和复杂性都有很大的影响。今天和大家讨论一下一个大型系统中，返回错误码的问题。

In this post，I will summarize the papers about distributed computing that I have read. On the one hand, this can help me to look some thing up when I need, and on the other hand, I will give some my personal views or summaries on them.

At the beginning of this year(2019), our project in company needed to use Redis as a backend storage, but we required 2 functionalities of it: strong consistency and table concept.