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Integrating SAP R/3 and Data Protector
Configuring an SAP R/3 Backup
Chapter 2 191
You can perform two types of online backups as well as offline backups.
• To start an offline backup, specify the -t offline and -d
util_file BRBACKUP options. You can alternatively specify
backup_dev_type = util_file and backup_type = offline in the
SAP parameter file.
• The two types of online backups differ according to the duration in
which tablespaces are in backup mode.
If the -t online and -d util_file BRBACKUP options are
specified, SAP R/3 puts all tablespaces in backup mode before the
backup begins, and puts them back into normal mode after the
backup. The same is achieved by specifying
backup_dev_type = util_file and backup_type=online in the
SAP parameter file.
If the -t online and -d util_file_online BRBACKUP options
are specified, SAP R/3 puts individual objects in backup mode before
the backup begins, and puts them back into normal mode after the
backup. The same is achieved by specifying
backup_dev_type = util_file_online and backup_type=online
in the SAP parameter file.
Refer to the SAP R/3 documentation for more information.
Backing Up Using Recovery Manager
Benefits Version 4.5 and higher of the SAP R/3 backup utilities allows Oracle data
files to be backed up using RMAN mode. RMAN mode is in general
transparent to the user. The User Interface remains unchanged and
allows the use of new options. The most important benefit of RMAN
mode is that the underlying Oracle database can be backed up
incrementally.
The backup procedure using RMAN mode is very similar to the one for
the underlying Oracle database using the Data Protector Oracle
integration. The following restrictions must be taken into account when
RMAN is used directly:
• The RMAN stores information about backups in the recovery catalog.
For security reasons, this catalog should be kept in a separate
database. This requires more administrative work.