安全删除mysql主从复制二进制日志详解

具体方法

//删除日志之前，先检查主从服务器当前使用的日志文件,

//首先登录要删除日志的服务器的 mysql 终端
#mysql -u root -pxxxxx

//检查复制主服务器状态
Mysql>show master status

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

//复制主服务器当前正在使用的日志文件是:mysql-bin.000097

//检查复制从服务器状态
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:

//复制从服务器当前正在使用的复制主服务器日志文件是:mysql-bin.000103

//当前正在使用的日志文件是000097,我需要做的是删除00095号之前的所有日志(预留出最近几天的日志)
Mysql>purge master logs to ‘mysql-bin.000095;

#ll /usr/local/mysql/var/

//从结果中发现，编号000097之前的所有日志都已经删除

//如果还有其他服务器需要清理日志,重新按上面的顺序进行就可以

补充：数据库,mysql教程