5.2.3.12 Using the asmcluster Attribute

You can use the asmcluster attribute to uniquely identify databases with the same DB_UNIQUE_NAME.

If you have databases with the same DB_UNIQUE_NAME but associated with different Oracle ASM clusters, then, starting with Oracle Exadata System Software release 19.1.0, you can use the asmcluster attribute to uniquely identify the databases.

The databases must be clients of different Oracle ASM clusters, and you must ASM-scoped security configured to facilitate cluster identification.

For example:

ALTER IORMPLAN                                          -
dbplan=((name=pdb1, share=4, flashcachemin=5G, asmcluster=asm1),  -
        (name=pdb1, share=2, limit=80, asmcluster=asm2),  -
        (name=pdb2, share=2, flashcachelimit=2G, asmcluster=asm1),  -
        name=default, share=1, flashcachelimit=1G))