Cloning Oracle ClusterWare 18c
You can now create a duplicate of an Oracle database by using the createDuplicateDB command of DBCA in silent mode.
This feature enables developers to work on identical copies of an Oracle database.
Oracle 18c now has the ability to do in-database row archival native to the database.
This could be good for databases that have both active data and archive data in the same database.
Test code additional
To find any errors prior to install execute the CLUVFY Cluster Verify Utility
Oracle 18c
cluvfy -stage pre crs -n allnodes