HP A.06.11 - Manual (Page 136)

NOTE:
Ensure that the Cell Manager and your Oracle Server client are synchronized. Otherwise,
if Time is not correct, the resume session functionality does not work properly.
NOTE:
The smallest backup unit is a backup set. Therefore, consider the following for the RMAN
option FILESPERSET:
• If the option is set to 1, RMAN creates a separate backup set for each file. In this
case, you benefit the most from the resume session functionality. However, note that
restore is significantly prolonged if files are backed up with many streams.
• If RMAN creates only one backup set for the files to be backed up and some files fail
to be backed up, the whole backup set fails. When you resume such a session, the
whole backup set is backed up again, including the files that were backed up
successfully.
Resuming restore sessions
The main benefit of resuming a restore session is that you do not need to specify, all
over again, what to restore, which devices to use, and so on. However, in reality,
there is no difference between a standard restore session and a resumed restore
session. In both cases, Oracle Server first checks if files to be restored already exist
at the target location and then restores only the missing ones.
NOTE:
Once you open the Oracle database with the RESETLOGS option, it is pointless to use
the resume session functionality for sessions that restored old backups (backups created
before the logs were reset).
Using the Data Protector GUI
1. In the Internal Database context, expand Sessions.
Integrating Oracle and Data Protector 136