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sdruss

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Oracle 12c RAC Upgrade: Moving from Solaris-10 to Solaris-11 and from 11G to 12c

Slightly different question that my previous post, but same subject.  Decided to open new question.  My customer became very nervous with our myriad of problems with my team’s rehearsing upgrading from Oracle RAC database 11.2.0.3 with Solaris-10.  We stumbled significantly with an out of date OS requiring many patches, several needed Grid Infrastructure patches, before getting to the upgrade, and then still not yet successful.

New approach:  Customer is now considering upgrading to Solaris-11 first, and then updating RAC database from 11G to 12c.  Experts, need your wisdom and experience.  For sure a full RMAN backup and then validated back will be my first order of business, after that …..  Appreciate recommendations, suggestions, etc.. Thanks!
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Avatar of Mark Geerlings
Mark Geerlings
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As has been said already, a good backup which should also be "recovery-tested" to ensure it is good.

As you're deciding on going for OS upgrade at the same time and you don't have the luxury of a separate machine, I would consider the following steps:

1. Take Full Oracle backup
2. Take O/S backup/Image
3. Take my RAC out of RAC configuration
4. Upgrade O/S on Node 1 (while Node 2 is still available to users)
5. Upgrade Oracle on Node 1
6. Test Oracle is 'running', or fix until running
7. Upgrade O/S on Node 2
8. Upgrade Oracle on Node 2
9. Test Oracle is running on Node 2. Fix until functioning satisfactorily
10. 'Re-RAC'

Hope this makes some sense.

R.