redis持久化
https://my.oschina.net/davehe/blog/174662
持久化分两种RDB和AOF，RDB简单来说，就是复制数据，AOF是记录每次写入的命令
redis事物
https://www.cnblogs.com/kyrin/p/5967620.html
innodb原理
https://www.cnblogs.com/shijingxiang/articles/4743324.html
联合索引原理
https://blog.csdn.net/weixin_41462047/article/details/80261546
内存池
https://www.ibm.com/developerworks/cn/linux/l-cn-ppp/index6.html
b树
https://blog.csdn.net/guoziqing506/article/details/64122287
websocket
https://www.cnblogs.com/fuqiang88/p/5956363.html
voatile
https://www.cnblogs.com/dolphin0520/p/3920373.html
双重检查
http://blog.chinaunix.net/uid-28811518-id-5752680.html
进程管理supervisor
https://www.cnblogs.com/zhoujinyi/p/6073705.html
callable
https://www.cnblogs.com/fengsehng/p/6048609.html
