标签：dataguard
select log_mode,open_mode ,database_role from v$database; --查看dataguard主备库状态 select status from v$instance; --查看数据库状态 alter database recover managed standby database cancel; --取消日志应用 alter database recover managed standby database using current logfile disconnect;--备库开启实时应用 select sequence#,applied from v$archived_log order by sequence#; --备库若全为yes 则表明standby库已经实时复制了 alter database recover managed standby database disconnect from session;--备库mount应用日志 alter system switch logfile;--主库切换日志 --启停dg主库 alter system set log_archive_dest_state_2 = 'defer'; lsnrctl stop shutdown immediate startup alter system set log_archive_dest_state_2 = 'enable'; --备库停止 alter database recover managed standby database cancel; shutdown immediate --备库开启 startup mount --启动到mount状态 alter database recover managed standby database disconnect from session; --启动日志应用 主备执行archive log list 看是否同步，备库可执行select * from v$archive_gap;看是否有延时 alter system switch logfile;--主库执行切换日志，看备库是否及时应用 日志同步成功后，备库执行 ALTER DATABASE RECOVER MANAGED STANDBY DATABASE CANCEL;--取消日志应用 alter database open;--将备库打开 alter database recover managed standby database using current logfile disconnect;--备库开启实时应用 select log_mode,open_mode ,database_role from v$database;--检查备库状态标签：dataguard
原文地址：http://blog.51cto.com/10814168/2055774
