Oracle 18c Allows PDB Duplication into Existing CDB Without Recreating It

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Oracle Database 12c supported PDB duplication via the RMAN DUPLICATE command, but required a new CDB to be created simultaneously, making it impossible to clone a PDB into an already existing CDB. Starting with Oracle Database 18c, this restriction was lifted, allowing a pluggable database to be duplicated directly into an existing container database. To perform the operation, the target CDB must have the REMOTE_RECOVERY_FILE_DEST parameter configured to store archived redo logs transferred from the source CDB during duplication. Any changes made to the source PDB while the process runs are captured in archived redo logs and applied to the target PDB upon completion, ensuring data consistency. The duplication is executed using RMAN's DUPLICATE PLUGGABLE DATABASE command pointed at the source and auxiliary (target) databases.

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