MGR集群环境MySQL大表传输表空间的坑
https://blog.csdn.net/ashic/article/details/93354517 http://fuxkdb.com/2017/08/22/%E4%B8%BB%E4%BB%8E%E4%BC%A0%E8%BE%93%E8%A1%A8%E7%A9%BA%E9%97%B4%E7%9A%84%E5%9D%91/