Pluggable Database Placement

Configure PDBs to either run explicitly in the specified CDB instances or run dynamically in any CDB or a subset of CDBs in the cluster.

You can choose from the following two placement options for the PDBs:

• Preferred and Available PDBs: These PDBs can run only in the explicitly specified CDB instances that are running on the list of specified cluster nodes. While configuring such PDBs, you need to provide a CDB name and the list of instances or nodes where the CDB can run. You can modify the list of instances or nodes where the CDB can run.
• Floating PDBs: These PDBs are created with specified cardinality and they can run on any instance of the CDB in which they are created. The cardinality of a PDB governs the number of nodes where a PDB can run at the same time. If you use a number for cardinality instead of ALL, then which instances the PDBs are opened in depends on the available resources of each instance.

  Oracle Clusterware evaluates resources for each cluster database instance based on the values of the -maxcpu and -mincpuunit parameters for the PDB. You must be logged in as either the grid or the root user to modify the -maxcpu, -mincpuunit, and -rank parameters.

You can configure the PDB placement option either while creating a new PDB or by modifying an existing PDB.