第一种:通过sql_slave_skip_counter跳过同步错误,适用于一般异常如插入时主键冲突
这种情况一般是在从库进行了写操作,错误提示
Last_SQL_Errno: 1062
Last_SQL_Error: Error ‘Duplicate entry ’14’ for key ‘PRIMARY” on query. Default database: ‘hadoop’. Query: ‘INSERT INTO `user` (`username`, `password`) VALUES (‘b’, ‘b’)’
1 row in set (0.00 sec)
如果提示
Last_SQL_Errno: 126
Last_SQL_Error: Error ‘Incorrect key file for table ‘./hadoop/user.MYI’; try to repair it’ on query. Default database: ‘hadoop’. Query: ‘INSERT INTO `user` (`username`, `password`) VALUES (‘c’, ‘c’)’
则先修复下表repair table user;再继续下面的操作
从库执行:
- #停止slave服务
- mysql> stop slave;
- Query OK, 0 rows affected, 1 warning (0.00 sec)
- #跳过一步错误,后面的数字可变,如果还不行可执行多次
- mysql> set global sql_slave_skip_counter =1;
- Query OK, 0 rows affected (0.00 sec)
- #开始slave服务
- mysql> start slave;
- Query OK, 0 rows affected (0.00 sec)
- #查看slave状态
- mysql> show slave status\G
- *************************** 1. row ***************************
- Slave_IO_State: Waiting for master to send event
- Master_Host: 192.168.20.195
- Master_User: test
- Master_Port: 3306
- Connect_Retry: 60
- Master_Log_File: mysql-bin.000004
- Read_Master_Log_Pos: 251
- Relay_Log_File: mysqld-relay-bin.000006
- Relay_Log_Pos: 251
- Relay_Master_Log_File: mysql-bin.000004
- Slave_IO_Running: Yes
- Slave_SQL_Running: Yes
- Replicate_Do_DB:
- Replicate_Ignore_DB:
- Replicate_Do_Table:
- Replicate_Ignore_Table:
- Replicate_Wild_Do_Table:
- Replicate_Wild_Ignore_Table: mysql.%,information_schema.%,performance_schema.%
- Last_Errno: 0
- Last_Error:
- Skip_Counter: 1
- Exec_Master_Log_Pos: 251
- Relay_Log_Space: 552
- Until_Condition: None
- Until_Log_File:
- Until_Log_Pos: 0
- Master_SSL_Allowed: No
- Master_SSL_CA_File:
- Master_SSL_CA_Path:
- Master_SSL_Cert:
- Master_SSL_Cipher:
- Master_SSL_Key:
- Seconds_Behind_Master: 0
- Master_SSL_Verify_Server_Cert: No
- Last_IO_Errno: 0
- Last_IO_Error:
- Last_SQL_Errno: 0
- Last_SQL_Error:
- 1 row in set (0.00 sec)
第二种:重新做主从,然后使用change master指定同步位置,这种耗时长
主库执行:
- mysql> flush tables with read lock;
- [root@hd3 ~]# mysqldump -uroot -p123456 –lock-all-tables –flush-logs hadoop > /data/hadoop.sql
- [root@hd3 ~]# scp /data/hadoop.sql root@192.168.20.201:/data/
- mysql> unlock tables;
从库执行:
- mysql> stop slave;
- Query OK, 0 rows affected (0.00 sec)
- mysql> reset slave;
- Query OK, 0 rows affected (0.01 sec)
- mysql> source /data/hadoop.sql
- mysql> change master to master_host=’192.168.20.195′, master_port=3306, master_user=’test’,master_password=’123456′, master_log_file=’mysql-bin.000003′,master_log_pos=932;
- Query OK, 0 rows affected (0.03 sec)
- mysql> start slave;
- Query OK, 0 rows affected (0.00 sec)
第三种:使用第三方工具如pt-table-sync