Redis实现
https://www.cnblogs.com/linjiqin/p/8003838.html
https://segmentfault.com/a/1190000015058486
https://www.cnblogs.com/VergiLyn/p/7968094.html
https://blog.csdn.net/forezp/article/details/70305336
Zoopkeeper
https://www.cnblogs.com/qingyunzong/p/8666288.html#_label4_7
https://www.cnblogs.com/qingyunzong/p/8666288.html#top
https://www.cnblogs.com/zhangjunqing/p/7823626.html
http://www.cnblogs.com/seesun2012/p/9214653.html