MYSQL 配置slave故障
之前为主从配置，后来分割成2个单实例。
现在环境需要，重新配置为主从，之前参数都已配置好，直接启动，如下：
mysql> change master to master_host='192.168.12.193',master_port=3306,master_user='master',master_password='123456',master_log_file='master-bin.000569',master_log_pos=107;
ERROR 29 (HY000): File './slave-relay-bin.000494' not found (Errcode: 2)
mysql>reset slave; 也不行
查看报错日志：
131210 10:56:44 [ERROR] Failed to open the relay log './slave-relay-bin.000494' (relay_log_pos 591818895)
131210 10:56:44 [ERROR] Could not find target log during relay log initialization
131210 10:56:44 [ERROR] Failed to initialize the master info structure
[root@b28-12195 data]# rm -rf master.info relay-log.info slave-relay-bin.*
mysql> change master to master_host='192.168.12.193',master_port=3306,master_user='master',master_password='123456',master_log_file='master-bin.000569',master_log_pos=107;
Query OK, 0 rows affected (0.00 sec)
mysql> show slave status\G
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.12.193
Master_User: master
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: master-bin.000572
Read_Master_Log_Pos: 107
Relay_Log_File: slave-relay-bin.000002
Relay_Log_Pos: 254
Relay_Master_Log_File: master-bin.000572
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
Replicate_Do_DB:
Replicate_Ignore_DB: test
Replicate_Do_Table:
Replicate_Ignore_Table:
Replicate_Wild_Do_Table:
Replicate_Wild_Ignore_Table:
Last_Errno: 0
Last_Error:
Skip_Counter: 0
Exec_Master_Log_Pos: 107
Relay_Log_Space: 410
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:
Replicate_Ignore_Server_Ids:
Master_Server_Id: 1
1 row in set (0.00 sec)
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