How to update a patch (RollingPatch) in the OracleRAC Environment)

How to update a patch (RollingPatch) in the OracleRAC Environment)

The Oracle RAC database environment has many similarities and differences with the single-instance database environment. You can use opatch to update database patches. However, there are several different update Methods for the RAC environment patch update, and you can even implement rolling upgrade for all nodes without downtime. This article describes the patch update method in the RAC environment and the update method selected under different circumstances.

The Opatch strategies discussed above (All-Node, Min. down-Time, and Rolling) presumes that all nodes will be patched at the same time. additionally, each node can be patched individually, at different times, using the "-local" key word, which will patch only the local node.