mysql主从断掉后，恢复

主库：10.0.2.75；从库：10.0.2.230；

mysql> show slave status\G;

mysql> flush tables with read lock\G

mysql> show master status\G

mysql> change master to master_host='10.0.2.230', master_user='root', master_password='123456', master_log_file='mysql-bin.000005', master_log_pos=625;

###mater_log_file和master_log_pos的值是在从库上执行show master status的结果

mysql> start slave;

出现报错；处理；

mysql> reset slave;

重新配置；

mysql> change master to master_host='10.0.2.230', master_user='root', master_password='123456', master_log_file='mysql-bin.000005', master_log_pos=625;

mysql> start slave;

mysql> show slave status\G;

主库成功；开始配置从库；

mysql> flush tables with read lock\G

mysql> show master status\G

mysql> change master to master_host='10.0.2.75', master_user='root', master_password='123456', master_log_file='mysql-bin.000008', master_log_pos=639208;

###mater_log_file和master_log_pos的值是在主库上执行show master status的结果

mysql>  start slave;

mysql> reset slave;

mysql> change master to master_host='10.0.2.75', master_user='root', master_password='123456', master_log_file='mysql-bin.000008', master_log_pos=639208;

mysql>  start slave;

mysql> show slave status\G

mysql> UNLOCK TABLES;