Overview of Oracle Multitenant with Oracle RAC

You can configure a multitenant Container Database (CDB) to use Oracle RAC.

You can make each PDB available on either every database instance of the Oracle RAC CDB or on a subset of instances. In either case, access to PDBs is regulated using dynamic database services. Applications uses these services to connect to a PDB, like they would connect to a single-instance non-CDB.

You can isolate PDBs to prevent certain operations from being performed on or within a particular PDB that may interfere with other PDBs sharing the same Oracle RAC database or instance. PDB isolation allows for greater consolidation.

If you create an Oracle RAC database as a CDB, and if you plug PDBs into the CDB, then by default a PDB is not started automatically on any instance. With the first dynamic database service assigned to the PDB (other than the default database service, which has the same name as the database name), the PDB is made available on those instances on which the service runs.

Regardless of whether a PDB is available on multiple instances of an Oracle RAC CDB, the CDB is typically managed by the services running on the PDB. You can manually enable PDB access on each instance by starting the PDB manually on that instance.