Procedure documentation Backing Up to a Group of Parallel Backup Media Locate the document in its SAP Library structure

Use

To ensure maximum data throughput, the Structure linkdatabase instance can be backed up to a several different backup media at the same time. You can set the maximum number of tape devices which can be used at the same time using parameter Structure linkMAXBACKUPDEVS. The use of up to 32 tape devices allows you to reduce backup times considerably.

Parallel backing up is only possible for Structure linkdata backups.

RecommendationRecommendation

We recommend that you check the logical consistency of the volumes before every complete data backup (Checking the Logical Consistency of the Volumes).

 

Prerequisites

There are multiple backup devices available.

You have defined the Structure linkbackup medium to which backup is to take place (Defining a Single Backup Medium).
If you want to perform a backup using an automatic tape loader (Backups to Automatic Tape Loader), or with the help of external backup tools(Backups with External Backup Tools), then you must state this specifically when defining the media.

Note

Under normal circumstances, you should backup Structure linkdatabase instances in the ONLINE Structure linkoperational status.
You can also backup database instances in the ADMIN operational state, but only in exceptional circumstances.

Procedure

  1. Choose Instance ® Backup and the selected backup type:
    ® Complete (    Structure linkcomplete data backup)
    ® Incremental     (    Structure linkincremental data backup)
    A group of parallel media cannot be used for log backups.

    A list of the backup media already defined for the selected backup type appears on the screen.
    If no backup media have been defined yet, you must define them now (    Defining a Group of Parallel Backup Media).
  2. Select the backup medium to be used for the backup.
  3. Check the details of the medium. Change them if required (Changing Backup Media).
  4. Choose the menu entry for the selected backup type in the menu bar at the top of the screen ® Next Step.

    Only for database systems up to version 7.3 (inclusive):
    If you want to perform a     Structure linkdata backup, now choose whether the backup is to be performed for Recovery or Migration.
    Recovery : Data backup for restoring the database instance if errors occur
    Migration: Data backup with checkpoint; that is, to migrate the database instance
    For more information about checkpoints, see the User Manual: SAP DB 7.3.
  5. Choose the menu entry for the selected backup type ® Start.
    The backup process begins.
    If the capacity of the group of parallel media is not large enough for the backup, Database Manager GUI asks you to specify and insert a new medium as soon as any of the media has been filled (see     Backups to Manually Changed Media).

Once the backup procedure has been successfully completed, you see the message Backup completed.