Identify two correct statements about multitenant architectures.
A.
Multitenant architecture can be deployed only in a Real Application Clusters (RAC) configuration.
B.
Multiple pluggable databases (PDBs) share certain multitenant container database (CDB) resources.
C.
Multiple CDBs share certain PDB resources.
D.
Multiple non-RAC CDB instances can mount the same PDB as long as they are on the same server.
E.
Patches are always applied at the CDB level.
F.
A PDB can have a private undo tablespace.
Explanation:
B: Using 12c Resource manager you will be able control CPU, Exadata I/O, sessions and
parallel servers. A new 12c CDB Resource Manager Plan will use so-called “Shares” (resource allocations)
to specify how CPU is distributed between PDBs. A CDB Resource Manager Plan also can use “utilization
limits” to limit the CPU usage for a PDB. With a default directive, you do not need to modify the resource
plan for each PDB plug and unplug.
E: New paradigms for rapid patching and upgrades.
The investment of time and effort to patch one multitenant container database results in patching all of itsmany pluggable databases. To patch a single pluggable database, you simply unplug/plug to a multitenant
container database at a different Oracle Database software version.
Incorrect:
Not A:
* The Oracle RAC documentation describes special considerations for a CDB in an Oracle RAC
environment.
* Oracle Multitenant is a new option for Oracle Database 12c Enterprise Edition that helps customers
reduce IT costs by simplifying consolidation, provisioning, upgrades, and more. It is supported by a new
architecture that allows a container database to hold many pluggable databases. And it fully complements
other options, including Oracle Real Application Clusters and Oracle Active Data Guard. An existing
database can be simply adopted, with no change, as a pluggable database; and no changes are needed in
the other tiers of the application.
Not D: You can unplug a PDB from one CDB and plug it into a different CDB without altering your schemas
or applications. A PDB can be plugged into only one CDB at a time.
not F:
* UNDO tablespace can NOT be local and stays on the CDB level.
* Redo and undo go hand in hand, and so the CDB as a whole has a single undo tablespace per RAC
instance.