Hi
I have some questions regarding rac database upgrade. At the moment all our environments (production, testing and development) are in 11.2, but thinking of upgrade. So first of all we should upgrade our development environment to 12.1
Our development db environment and testing db environment are both in same servers (2 node rac), running from same ORACLE_HOME and they are sharing same asm disks. When upgrading, I think I need to create new branch for 12.1 databases into that same server, because my production and testing environment would still be in 11.2 (to maintain compatibility, because ongoing application development is in progress).
So basically plan would be that I have:
- 2x development environments (11.2 db and 12.1 db) in same server
- * 2x testing environments (11.2 db and 12.1 db) in same server (after I get confirmation that everything looks good in 12.1 development environment)
After everything works fine in 12.1 testing environment, I'll do production environment upgrade.
Note that testing and production environment also has physical standy.
So questions:
- If I do grid upgrade from 11.2 to 12.1, will all my present 11.2 databases still work, without doubt, with db version 11.2..?
- If not, then can I just install 12.1 grid additionally into that same server so that both grids (11.2 and 12.1) work in parallel..?
Thank you!
Kind regards
Raul