When you are running Real Application Clusters, the distinction between the instance and the database becomes very clear. You now have an instance running on each server in the cluster that accesses a common database on shared storage. If you run oraenv with a newly installed RAC database, you will notice that you still have to make adjustments to environment variables to access your instance. We are going to continue the theme from my last post (using Oracle’s oraenv), and take a look at using Oracle oraenv with RAC.

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