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OS upgrade on 2-node RAC 10.2.0.4 system

ergempMay 25 2011 — edited May 26 2011

Dear all,

We are planning an OS upgrade from AIX5.3 to AIX6.1 as AIX5.3 OS support comes to an end by the IBM. For single instance databases procedure is quite simple. We shutdown the Database and ASM instances respectively. Upgrade the OS to AIX6.1 and relink Oracle 10.2.0.4 software for both ASM and Database instances and open up the Database after ASM.

The question is what should be the procedure for the 10.2.0.4 RAC database. Is there a supported guide to upgrade the OS in a rolling fashion? Or should we stop all RAC instances and upgrade the OS at the same time on all nodes and startup the servers. This means a huge downtime for our production and also we should be prepared for the surprises after the reboot of the servers which means a high risk for the business.

I could not find too much documentation on this issue up to now. There are some forum entries, but again the answers are questionable as they dont reference to a valid documentation from Oracle Corp.

Any suggestions and/or references are welcome.
Thanks,
ergemp.

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Locked on Jun 23 2011

Added on May 25 2011

#cluster, #database, #oracle, #performance-availability, #rac, #rac-asm-clusterware-installation, #upgrade

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