Relay_Log_File

 show slave status/G

              Master_Log_File :   mysql - binlog . 000024
          Read_Master_Log_Pos :   106
               Relay_Log_File :  00cdde7c5b1d400 - relay - bin . 000007
                Relay_Log_Pos :   554
        Relay_Master_Log_File :   mysql - binlog . 000001