安全刪除mysql主從複製二進位日誌技巧

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上載者:User

//刪除日誌之前,先檢查主從伺服器當前使用的記錄檔,

 

 代碼如下 複製代碼

//首先登入 要刪除日誌的伺服器的 mysql 終端
#mysql -u root -pxxxxx


//檢查複製主伺服器狀態
Mysql>show master status


+------------------+-----------+--------------+----------------------------------------+
| File             | Position  | Binlog_Do_DB | Binlog_Ignore_DB                       |
+------------------+-----------+--------------+----------------------------------------+
| mysql-bin.000097 | 541677824 | www      | test,mysql,information_schema |
+------------------+-----------+-------------+----------------------------------------+


//複製主伺服器當前正在使用的記錄檔是:mysql-bin.000097

 

 代碼如下 複製代碼

//檢查複製從伺服器狀態
Mysql>show slave statusG


*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 202.102.152.3
                  Master_User: replication
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000103
          Read_Master_Log_Pos: 675107897
               Relay_Log_File: www-relay-bin.000443
                Relay_Log_Pos: 675097929
        Relay_Master_Log_File: mysql-bin.000103
             Slave_IO_Running: Yes
            Slave_SQL_Running: Yes
              Replicate_Do_DB: www
          Replicate_Ignore_DB: test,mysql,information_schema
           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: 675107897
              Relay_Log_Space: 675098125
              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:


//複製從伺服器當前正在使用的複製主伺服器記錄檔是:mysql-bin.000103


//當前正在使用的記錄檔是000097,我需要做的是刪除00095號之前的所有日誌(預留出最近幾天的日誌)

 代碼如下 複製代碼

Mysql>purge master logs to ‘mysql-bin.000095;


#ll /usr/local/mysql/var/


//從結果中發現,編號000097之前的所有日誌都已經刪除


//如果還有其他伺服器需要清理日誌,重新按上面的順序進行就可以

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