Patching oracle apps with data guard

Lately we have applied a ptach on our apps instance with physical standby database.



Following are the steps used.



1. Stopped the recovery delay in standby db

2. Stopeed application tier services on production

3. Switch the log in prod db and get the last sequence#

4. verify on standby that last log applied

5. Stop recovery on standby

6. Take the apps prod instance to maintenance mode using adadmin

7. Perfoem patching

8. Re-start redo shipping and apply on standby

9. Run middle tier pre-clone on prod

10. Run DB tier pre-clone (Only if patching updates ORACLE_HOME)

11. Synchronize the application tier file system with standby (use rsync on linux)

12. When sync completes create new context file using adclonectx.pl

13. After new context file created configure file system using adconfig.pl

14. Optinally configure standby DB file system if you did step 10.

15. End.



Now the production and stnadby oracle applications instances are in sync.