*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.1.100
Master_User: repl
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysqlmaster-bin.000004
Read_Master_Log_Pos: 327
Relay_Log_File: slave-relay-bin.000002
Relay_Log_Pos: 289
Relay_Master_Log_File: mysqlmaster-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:
Last_Errno: 0
Last_Error:
Skip_Counter: 0
Exec_Master_Log_Pos: 327
Relay_Log_Space: 462
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
Master_UUID: 2e5e1b22-f0a9-11e3-bbac-000c297799e0
Master_Info_File: /var/lib/mysql/master.info
SQL_Delay: 0
SQL_Remaining_Delay: NULL
Slave_SQL_Running_State: Slave has read all relay log; waiting for the slave I/O thread to update it
Master_Retry_Count: 86400
Master_Bind:
Last_IO_Error_Timestamp:
Last_SQL_Error_Timestamp:
Master_SSL_Crl:
Master_SSL_Crlpath:
Retrieved_Gtid_Set:
Executed_Gtid_Set:
Auto_Position: 0
1 row in set (0.00 sec)
如果Slave_IO_Running和Slave_SQL_Running两项都为yes，就表示主从复制配置成功了.
下面可以开始测试配置是否成功了，首先在主数据库的test数据库中新建一张表，然后插入几条数据，然后到从数据库看看是否同步过来了。
注意：当从数据库有大量的查询时，可以暂时将从数据库的复制线程关闭掉，等查询量降下来了，再打开，这样也不会丢失数据。