MySQL优化之――复制 - 数据库编程

复制的登录远程主机的用户

master_password：表示实现复制的登录远程主机的密码

master_log_file：表示实现复制的binlog日志文件

master_log_pos：表示实现复制的binlog日志文件的偏移量

12、继续在从机执行操作，显示slave从机的状况，如下所示

start slave;

Command(s) completed successfully.

mysql> SHOW SLAVE STATUS \G; *************************** 1. row *************************** Slave_IO_State: Master_Host: 192.168.1.100 Master_User: repl Master_Port: 3306 Connect_Retry: 60 Master_Log_File: binlog??00004 Read_Master_Log_Pos: 107 Relay_Log_File: Steven-PC-relay-bin.000002 Relay_Log_Pos: 4 Relay_Master_Log_File: binlog??00004 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: 107 Relay_Log_Space: 107 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: 1236 Last_IO_Error: Got fatal error 1236 from master when reading dat a from binary log: 'Could not find first log file name in binary log index file' Last_SQL_Errno: 0 Last_SQL_Error: Replicate_Ignore_Server_Ids: Master_Server_Id: 1 1 row in set (0.00 sec) ERROR: No query specified

在上述执行show slave status \G命令中很显然存在一些问题，问题如下

 Last_IO_Errno: 1236
                Last_IO_Error: Got fatal error 1236 from master when reading dat
a from binary log: 'Could not find first log file name in binary log index file'

下面的步骤可以解决问题，具体步骤如下

1、重启master（192.168.1.100）主机的mysql服务，执行show master status \G命令

记下File和Position的值，后面slave主机会用到，命令执行如下

SHOW MASTER STATUS;

2、在slave（192.168.1.102）主机上重新设置信息，命令执行如下

stop slave;

change master to
master_log_file='binlog.000005',
master_log_pos=107;

start slave;

mysql> SHOW SLAVE STATUS \G;
*************************** 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: binlog.000005
          Read_Master_Log_Pos: 107
               Relay_Log_File: Steven-PC-relay-bin.000002
                Relay_Log_Pos: 250
        Relay_Master_Log_File: binlog.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: 107
              Relay_Log_Space: 410
              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
1 row in set (0.00 sec)

ERROR:
No query specified

这次正常了，实际上刚才有两个地方是错误的

第一个：在从机的my.ini里面

[mysql]
default-character-set=utf8
#log_bin="C:/MYSQLLOG/binlog"
#expire_logs_days=10
#max_binlog_size=100M

在从机的my.ini里面的mysql配置节下面配置了binlog，实际上这样做是错误的，要配置binlog需要在[mysqld]配置节下

第二个：第一次配

MySQL优化之――复制(三)