Database Install/Upgrade/Opatch (MOSC)

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Upgrade and Containerization of a very large RAC database

edited May 25, 2020 10:24AM in Database Install/Upgrade/Opatch (MOSC) 5 commentsAnswered

Hi

One of our clients wants to upgrade their existing 12c (12.1.0.2) database running on RAC /ASM to  19c.  It is a very large database (of about 35 TB).  They are OK with downtime.

My plan is to  

(1)  upgrade Grid Infrastructure from 12c to 19c. (19.0.0.0.0)

(2)  Create an empty CDB.

(3)  Upgrade the existing database from 12c to 19c  (using catupgrd)

(4)Convert this Non-CDB database into PDB and plug it into  19c CDB.

I want to know how much downtime is required for each step.  Since this is a very large database I am not sure it can complete within an hour as it does for the usual 100GB size databases that we have upgraded till now. Also we are not sure how much time it takes for last step (containerization of standalone database  into PDB).

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