The image shows the topology of the use case described above.

In the upper left is the source primary CDB (CDB100) containing 3 PDBs (PDB001, PDB002 with an "x" on it, and PDB003).

The lower left shows the standby CDB for CDB100 (CDB100_STBY) containing 2 PDBs (PDB001, PDB003).

An arrow from source primary CDB CDB100 pointing to its standby CDB100_STBY is labeled "Data Guard Redo Ship/Apply".

The lower right of the image shows the destination primary CDB (CDB200) showing one PDB (PDB002) above the first PDB "socket" .

Between the source standby CDB (CDB100_STBY) and the destination primary CDB (CDB200) is shown an ASM disk group with solid lines to each CDB.

There is also an unlabeled arrow pointing from PDB002's "socket" in CDB100_STBY to the first position in CDB200, indicating that the PDB002 is in the process of unplugging from the source standby and being plugged into the destination primary.