colleagues, I need some help 'staged system' approach / autoconfig/upgrade

Gentlemen - I have a problem,

Will to upgrade R12.0.4 on CARS (32-bit linux) R12.0.6 RAC 11.2 10.2 (linux 64 bit) on new hardware with minimal downtime.

The plan is to use a 'Staging system' approach where we will clone the system to new servers and new topology (the new system has a few different intermediate etc.) while current production is still running.
Then while the company is still underway off the coast of the old Kit we will be upgraded to - end the copy on the new servers (which is not used at this time).

so now the system we cloned on the new servers, we will:
change DB wordsize to 64-bit
change DB 11.2.0.1 worm
then run the 12.0.6 patch to upgrade the system as a whole (db and app nodes) to 12.0.6
the history of patch of the export of the db using adphmigr.ph (no db)

(If at this stage, we have 2 systems one) old production and b) completely new system on the new kit

now, we must make the prod system nedw (b) system, so we need to get current data prod transferred with minimal downtime, so we intend to (a weekend):
(1) complete the business on the current prod
(2) move the database to upgrade to the new system (b) (ignore the system (a) in the future)
((3) rapidclone the prod (a) database to the new servers for the system (b) (in replacement of the db we come to fall) (we have only configure db - no application of bleachers and yet they're 12.0.6 awaits us) database (b) now contains current information)
(4) convert newly cloned db to new (b) servers to 64-bit - then upg to 11.2.0.1
(5) run 1 12.0.6 autoconfig high (sys b) to associate with the new db (X)
then run adpatch (I can safetly run among the 12.0.6 adpatch new levels? against the 12.0.4 db) of a 12.0.6 high with nocopyportion nogenerate, so that it only upgrades the db to 12.0.6
(6) to perform automatic configuration of all other midtiers associated with the db
(7) start the history of patch in the db via adpatch for each appl_top

what the above reasonable sound?
(x) safe above? (to associate a 1206 Middle 1204 db?)

comments gratefully received
Martin

what the above reasonable sound?

It seems reasonable to me. However, I recommend you log an SR and confirm with the support of the Oracle if your approach is taken in charge or not. Additionally, if you could try in the same place on a TEST first instance to avoid errors and problems you may experience.

(x) safe above? (to associate a 1206 Middle 1204 db?)

Yes, but are you planning to create the appsutil.zip file, copy it to the node of the database layer and remove it? If Yes, I would expect a few problems because of the mismatch between the 12.0.4 database and 12.0.6 application.

Thank you
Hussein

Tags: Oracle Applications

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