mysq在某一刻同时获取主从库的位置点

在从库进行锁表操作flush table with read lock，

通过show slave status\G 获取对应主库的位置点：

show slave status\G
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 100.119.16.72
Master_User: root
Master_Port: 20160
Connect_Retry: 60
Master_Log_File: mysql-bin.000005
Read_Master_Log_Pos: 274264328
Relay_Log_File: relay-bin.000070
Relay_Log_Pos: 14356867
Relay_Master_Log_File: mysql-bin.000005
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: 274264328
Relay_Log_Space: 24804608
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: 113235
Master_UUID: b6c2a4cb-8973-11e7-8042-6c92bf482dbf
Master_Info_File: /data1/mysql_root/data/20160/master.info
SQL_Delay: 0
SQL_Remaining_Delay: NULL
Slave_SQL_Running_State: Slave has read all relay log; waiting for more updates
Master_Retry_Count: 86400
Master_Bind:
Last_IO_Error_Timestamp:
Last_SQL_Error_Timestamp:
Master_SSL_Crl:
Master_SSL_Crlpath:
Retrieved_Gtid_Set: 6c1f2f1d-8875-11e7-b55d-18ded7a37fee:4103537-4109582,
b6c2a4cb-8973-11e7-8042-6c92bf482dbf:1-13481914
Executed_Gtid_Set: 6c1f2f1d-8875-11e7-b55d-18ded7a37fee:4103537-4109582,
b6c2a4cb-8973-11e7-8042-6c92bf482dbf:1-13481914,
bf3d5f44-8973-11e7-aaa2-6c92bf482c5f:1-135
Auto_Position: 1
Replicate_Rewrite_DB:
Channel_Name:
Master_TLS_Version:
1 row in set (0.00 sec)

在从库执行show master status获取从库备份时的位置点：

show master status;
+------------------+----------+--------------+------------------+---------------------------------------------------------------------------------------------------------------------------------------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+--------------+------------------+---------------------------------------------------------------------------------------------------------------------------------------------------+
| mysql-bin.000061 | 14461503 | | | 6c1f2f1d-8875-11e7-b55d-18ded7a37fee:4103537-4109582,
b6c2a4cb-8973-11e7-8042-6c92bf482dbf:1-13482456,
bf3d5f44-8973-11e7-aaa2-6c92bf482c5f:1-135 |
+------------------+----------+--------------+------------------+---------------------------------------------------------------------------------------------------------------------------------------------------+
1 row in set (0.00 sec)