Need to Oracle database from 11g R1 to 19c. And from IBM power system 7 to IBM Power system 9. It was challenging 11gR1 does not support POWER 9 and Power 7 Does not support 19c. So we have to do 2 upgrade. From 11gR1 to 11gR2 and Then to 19c.
Lessons Learned
As per the scenario i have no choice other then we followed.
