Oracle 21c has only CDB-PDB Architecture
- The non-CDB architecture was deprecated in Oracle Database 12c (12.10.2).
- It is desupported in Oracle Database 20c. Oracle Database 20c was the first CDB-PDB release. Now there is no Oracle Database 20c.
- Hence, Oracle 21c will be now the first CDB-PDB only release.
- Oracle Database 21c is the first Oracle database release with CDB-PDB only architecture.
- You can’t have a non-CDB in Oracle 21c anymore.
- Oracle Universal Installer can no longer be used to create non-CDB Oracle Database instances in Oracle 21c.
- Starting with Oracle Database 21c, installation of non-CDB Oracle Database architecture is no longer supported.
Thanks
With Best Wishes!!!!
Ahmad
ACE
Cloud Architect
Oracle Database Consultant
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