环境：
主从服务器上的MySQL数据库版本同为5.1.44,服务器系统为redhat5.4-i386
主机IP：192.168.0.1
从机IP：192.168.0.2
一. MySQL主服务器配置
编辑配置文件/etc/my.cnf
server-id = 1
log-bin=mysql-bin
log-slave-updates
建立用户
mysql> grant replication slave on *.* to slave@192.168.0.2 identified by ‘111′;
mysql> SHOW MASTER STATUS;
+------------------+----------+--------------+------------------+
| File | Position | Binlog_do_db | Binlog_ignore_db |
+------------------+----------+--------------+------------------+
| mysql-bin.000003 | 239 | | |
+------------------+----------+--------------+------------------+
二.MySQL从服务器配置
编辑 /etc/my.cnf
server-id=2
log-bin=mysql-bin
master-host=192.168.0.1
master-user=slave
master-password=111
master-port=3306
log-slave-updates
在SLAVE上设置同步
mysql> slave stop;
mysql> CHANGE MASTER TOMASTER_HOST='192.168.0.1',MASTER_USER='slave',MASTER_PASSWORD='111',MASTER_LOG_FILE='mysql-bin.000001',MASTER_LOG_POS=106;
启动SLAVE服务
mysql> slave start;
查看SLAVE状态
mysql> start slave io_thread;
Query OK, 0 rows affected (0.00 sec)
mysql> show slave status\G
*************************** 1. row***************************
Slave_IO_State:
Master_Host: 192.168.0.1
Master_User: slave
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000003
Read_Master_Log_Pos: 239
Relay_Log_File: localhost-relay-bin.000001
Relay_Log_Pos: 4
Relay_Master_Log_File: mysql-bin.000003
Slave_IO_Running:No
Slave_SQL_Running: Yes
Replicate_Do_DB:
Replicate_Ignore_DB:
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: 239
Relay_Log_Space: 106
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: NULL
Master_SSL_Verify_Server_Cert: No
Last_IO_Errno: 1045 Last_IO_Error: error connecting to master 'slavemaster-password=111@192.168.0.1:3306' - retry-time: 60 retries: 86400 Last_SQL_Errno: 0 Last_SQL_Error:1 row in set (0.00 sec)
重新做了七遍，每次都是Slave_IO_Running: No，尝试着用startslave io_thread启用IO，但都失败了，这是为什么呢？
