I have been given the requirement to migrate a 9i RAC 3 node database( 9i cluster) to 11g R2 RAC database iam looking for a document or steps to do this activity. any help on this is highly appreciated.
should I upgrade the cluster first and then upgrade each node one by one or I should upgrade the cluster and upgrade all the home in one go ?
You may be better off standing up a completely new cluster and using RMAN or expdp to do this upgrade - this, of course, is also dependent upon size. You must be at a minimum of 22.214.171.124 to even use "upgrade".