第一阶段 一.数据的初始化 1.老主库 关闭sql_log_binset sql_log_bin = off; 创建导出用户grant all privileges on *.* to 'dump'@'10.50.31.37' identified by 'rooT_258';grant all privileges on *.* to 'dump'@'10.1.21.47' identified by 'rooT_258';grant all privileges on *.* to 'dum