1 mysql分布式数据库，如 mycat https://www.cnblogs.com/zzsdream/articles/6650690.html
2 读写分离，mysql主从复制+mysql proxy http://www.cnblogs.com/phpstudy2015-6/p/6687480.html
3 mysql负载均衡，haproxy+mysql http://www.cnblogs.com/phpstudy2015-6/p/6706465.html
4 mysql cluster https://www.cnblogs.com/linkstar/p/6510713.html
