mysql主从不同步怎么办

mysql主从不同步解决方法：

1、进入主库，进行锁表

使用命令：

mysql> flush tables with read lock;

注意：该处是锁定为只读状态，语句不区分大小写

2、进行数据备份

#把数据备份到mysql.bak.sql文件
[root@server01 mysql]#mysqldump -uroot -p -hlocalhost > mysql.bak.sql

3、查看master 状态

mysql> show master status;
+-------------------+----------+--------------+-------------------------------+
| File              | Position | Binlog_Do_DB | Binlog_Ignore_DB              |
+-------------------+----------+--------------+-------------------------------+
| mysqld-bin.000001 |     3260 |              | mysql,test,information_schema |
+-------------------+----------+--------------+-------------------------------+
1 row in set (0.00 sec)

4、把mysql备份文件传到从库机器，进行数据恢复

#使用scp命令
[root@server01 mysql]# scp mysql.bak.sql root@192.168.128.101:/tmp/

5、停止从库的状态

mysql> stop slave;

6、然后到从库执行mysql命令，导入数据备份

mysql> source /tmp/mysql.bak.sql

7、设置从库同步

change master to master_host = '192.168.128.100', master_user = 'rsync', master_port=3306, master_password='', master_log_file = 'mysqld-bin.000001', master_log_pos=3260;

8、重新开启从同步

mysql> start slave;

查看同步状态

mysql> show slave status\G

查看：

Slave_IO_Running: Yes
Slave_SQL_Running: Yes

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