HP A.06.11 - Manual (Page 29)

How does the integration work?
Ob2rman.pl executes RMAN, which directs the Oracle server processes on the
target database to perform backup, restore and recovery. RMAN maintains the
required information about the target databases in the recovery catalog, the Oracle
central repository of information, and in the control file of a particular target database.
The main information which ob2rman.pl provides to RMAN is:
• Number of allocated RMAN channels
• RMAN channel environment parameters
• Information on the database objects to be backed up or restored
For backup, ob2rman.pl uses the Oracle target database views to get information
on which logical (tablespaces) and physical (datafiles) target database objects are
available for backup.
For restore, ob2rman.pl uses current control file or recovery catalog (if used) to get
information on which objects are available for restore.
Using the Data Protector integration with RMAN, you can back up and restore the
Oracle control files, datafiles, and Archived Redo Logs.
The interface from the Oracle server processes to Data Protector is provided by the
Data Protector Oracle integration Media Management Library (MML), which is a set
of routines that allows the reading and writing of data to General Media Agents.
Besides handling direct interaction with the media devices, Data Protector provides
scheduling, media management, network backups, monitoring, and interactive
backup.
Oracle backup types handled by the integration
Using this integration, you can perform the Oracle full and incremental (up to
incremental level 4) backup types.
With Oracle full and incremental level 0 backups all data blocks per datafile are
backed up. With Oracle incremental backup (level 1 or higher), only the data blocks
that have changed since a previous backup are backed up.
The difference between a full backup and an incremental level 0 backup is that the
incremental 0 is a base for subsequent incremental backups. Therefore, Data Protector
always performs Oracle incremental 0 when you select the full backup type in a
backup specification.
The full backup type is not related to the number of datafiles included in the backup,
and can therefore be performed per single datafile. The data being backed up,
Integration guide for Oracle and SAP 29