I have two physical servers, hosting 6 two node RAC databases running in 22.214.171.124 version (both grid and database).
I'm told to have the grid software in 126.96.36.199 version and the databases in the same 188.8.131.52 version since there could be future plans to upgrade the database to a higher version.
Plan is to create new grid software (184.108.40.206) and create a new ASM instance with new luns and create diskgroups with the new luns, create a new database and then export/import from old database to this new database. So that the new database will have the Grid and ASM running in 220.127.116.11 and database in same 18.104.22.168.
Perform the same activity for all 6 databases, post that uninstall 22.214.171.124 software and binaries, resulting in the required result wherein only one ASM instance will be running (126.96.36.199).
Is the above mentioned activity feasible? I'm not in a situation to upgrade 188.8.131.52 grid to higher version as I cannot afford downtime. But then the above mentioned activity will have two ASM instances running at the same time for some period.
I can add/clear doubts if the mentioned activity is unclear.