mysql主备异常后的数据同步方式

flush table with read lock;

mysqldump -uroot -p123456 --opt -R test > /home/bakdb.sql

mysqldump --socket=/var/lib/mysql/mysql.sock -uroot -p123456 --opt -R test > /home/bakdb.sql

show master status;

mysql> show master status;
+------------------+----------+--------------+------------------+-------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+--------------+------------------+-------------------+
| mysql-bin.000006 |      726 |              |                  |                   |
+------------------+----------+--------------+------------------+-------------------+
1 row in set (0.01 sec)

mysql> show master status;
+------------------+----------+--------------+------------------+-------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+--------------+------------------+-------------------+
| mysql-bin.000003 |     2060 |              |                  |                   |
+------------------+----------+--------------+------------------+-------------------+
1 row in set (0.00 sec)

stop slave;

mysql> source /home/bak.sql

stop slave;
unlock tables;

CHANGE MASTER TO master_host = '192.168.123.82',
 master_port = 3306,
 master_user = 'root',
 master_password = '123456',
 master_log_file = 'mysql-bin.000003',
 master_log_pos = 2060;

CHANGE MASTER TO master_host = '192.168.123.78',
 master_port = 3306,
 master_user = 'root',
 master_password = '123456',
 master_log_file = 'mysql-bin.000006',
 master_log_pos = 726;