DG主备切换主要说明

Posted 2020-11-11

alter system switch logfile; 切换主库日志

select max(sequence#) from v$archived_log; 对比主备库日志，同步才能做下一步

alter database commit to switchover to standby with session shutdown; 有用户登录，主库强制切换

主备库都重启到 mount状态下，备库执行转换命令 ；alter database commit to switchover to primary

alter database open; 备库打开库，然后主库打开库

recover managed standby database disconnect from session; 主库执行MRP进程恢复

select name,open_mode,database_role,protection_mode,switchover_status from v$database; 俩库都检查

主备切换完成