https://www.nginx.com/resources/glossary/load-balancing/
https://docs.nginx.com/nginx/admin-guide/load-balancer/
http://www.infoq.com/cn/news/2014/09/twitter-redis
http://highscalability.com/blog/2014/9/8/how-twitter-uses-redis-to-scale-105tb-ram-39mm-qps-10000-ins.html
https://www.csdn.net/article/2014-09-10/2821615-how-twitter-uses-redis-to-scale-105tb-ram-39mm-qps-10000-ins
http://www.ioremap.net/2014/09/09/how-is-redis-used-in-twitter/
http://www.ioremap.net/2014/09/09/how-is-redis-used-in-twitter/
数据怎么在redis 更新, mq ?