In Oracle Database 21c, AutoUpgrade automates all the steps needed to upgrade an Oracle Real Application Clusters (Oracle RAC) database.
AutoUpgrade automates steps that previously had to be performed manually or scripted. Steps that AutoUpgrade automates include the
SRVCTL commands to stop and restart instances on multiple nodes, handling of
CLUSTER_DATABASE, updating initialization parameter files, and restarting services, where appropriate.
This feature reduces the possibility of manual errors and decreases the work needed for DBAs to perform routine maintenance and upgrade activities.