BRBACKUP offers the option to backup onto several hard disks (see Backup to Multiple Disks).

• Parallel backup onto the specified hard disks is possible. The directories must be defined in parameter backup_root_dir . The backup can be carried out with or without software compression. You can make a two-phase backup.

The degree of parallelism (the number of parallel copy processes) is controlled by parameter exec_parallel of initialization profile init<DBSID>.sap (see exec_parallel) or the command option -e .

In order to avoid weighing the database server down with the second level of backup, the following procedure would be conceivable: Unmount ( umount ) the file system from the database server, and mount ( mount ) this file system on a second host. Then start the backup from this host. A requirement for this procedure is that the hard disk controllers for the backup disks can be physically mounted on both hosts simultaneously. The operations umount and mount are necessary, since the file system cannot be mounted on different computers at the same time due to the buffering mechanism.