标签:最大保护
1. 主库增加 4个 Standbylog文件:
alter database add standby logfile '/u01/oradata/prod/std_redo01.log' size 50m;
2. 备库关闭MRP
recover managed standby database cancel;
3. 备库增加 4个 Standbylog文件:
alter database add standby logfile '/u01/oradata/prodstd/std_redo01.log' size 50m;
4. 俩库都备份spfile文件: create pfile from spfile;
5. 主库更改最大保护模式:
alter system set log_archive_dest_2=' SERVICE=shanghai sync affirm VALID_FOR(ONLINE_LOGFILES,PRIMARY_ROLE) DB_UNIQUE_NAME=shanghai';
6.主库更改最大保护模式:
alter system set log_archive_dest_2=' SERVICE=beijing sync affirm VALID_FOR (ONLINE_LOGFILES,PRIMARY_ROLE) DB_UNIQUE_NAME=beijing';
7. 先关主库;再关备库;先起备库,后起主库,都到mount状态
8. 主库执行最大保护命令(备库不需要操作),alter database set standby database to maximize protection;
9.先打开备库,后打开主库,备库执行如下命令(当前日志及时恢复数据)
recover managed standby database using current logfile disconnect from session;
10. 检查,验证等:select name,open_mode,database_role,protection_mode,switchover_status from v$database;
11. 最大性能转换最大保护完成
标签:最大保护
原文地址:http://blog.51cto.com/7237876/2125584