Backing Up Oracle - Computing at Cornell

Note
You cannot perform duplexed backups unless you enable this parameter.
Otherwise, Oracle returns an error. When this parameter is enabled,
Recovery Manager will configure as many server processes as needed for
the number of backup copies requested.
C.3.2.1 TDP configuration
You may define up to 3 additional management classes in the tdpo.opt file.
The parameters are TDPO_MGMT_CLASS2, TDPO_MGMT_CLASS3 and
TDPO_MGMT_CLASS4. They describes the corresponding management
classes.
The management classes have also to be defined in TSM. Be aware of the
following considerations:
You will receive an error message if you specify set duplex 4 in the RMAN
backup script and do not define enough TDPO_MGMT_CLASS options in
the tdpo.opt file.
Make sure the storage pool information for each backup copy group within
the management classes is not the same.
Make sure backups from these different storage pools are not migrated to
the same storage pool at a later time.
Be aware that duplicate data will be sent across the network.
Be aware that if you specify set duplex 4 and allocate one channel in the
RMAN backup script, RMAN will start four sessions to the TSM server.
Likewise, if you specify set duplex 4 and allocate two channels in the
RMAN backup script, RMAN will start eight sessions to the TSM server.
Make sure RMAN does not start more sessions than the maximum mount
points allowed by the TSM server. This TSM server option restricts the use
of tape at one time by the node. You can view the maximum mount points
allowed by the TSM server for a particular node by entering the following
command from a TSM Administrative Client prompt: q nodef=d .
C.3.2.2 Backup example using the RMAN duplex option
In our test environment, the TSM server has only 2 tape drives, so the client
node brazil_oracle has a maximum mount points allowed of 2.
The TSM administrator created a new management class with the following
commands:
Appendix C. TDP for Oracle Version 2.2 217