如题,我有两个数据库 主库 A 192.168.30.128 备库 B 192.168.28.129 现在的情况是我把两台数据库用主从复制模式,主库开启binlog,备库通过主库binlog重演主库,生产主库备份。主库master 备库slave ,备库作为了只读数据库,现在主库挂了,有何办法能使主库失效,应用直接启动备库
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