mysql 主从笔记

mysql> show slave status\G;
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 192.168.2.243
                  Master_User: root
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000060
          Read_Master_Log_Pos: 555252171
               Relay_Log_File: localhost-relay-bin.000128
                Relay_Log_Pos: 516436537
        Relay_Master_Log_File: mysql-bin.000060
             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: 555252171
              Relay_Log_Space: 516436714
              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: fa0dec8d-997c-11e5-b665-2a4f3d045032
             Master_Info_File: /home/data/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)

 

 

===================================

1、读取到主库的binlog 日志位置

Master_Log_File: mysql-bin.000060
          Read_Master_Log_Pos: 555252171

2、从库sql执行到的中继日志位置

               Relay_Log_File: localhost-relay-bin.000128
                Relay_Log_Pos: 516436537

3、从库sql执行到主库binlog日志的位置

Relay_Master_Log_File: mysql-bin.000060
Exec_Master_Log_Pos: 55525217

2和3是执行到的位置日志，数据库停住的时候这2个位置的sql语句是一样的。