DEDUPREQUIRESBACKUP

The DEDUPREQUIRESBACKUP option specifies whether volumes in primary sequential-access storage pools that are set up for data deduplication can be reclaimed and whether duplicate data can be discarded before the storage pools are backed up.

If the value of this option is YES (the default), you must back up data to copy storage pools that are not set up for data deduplication. Use the BACKUP STGPOOL command to back up data to copy storage pools.

Be aware that reclamation of a volume in a storage pool that is set up for data deduplication might not occur when the volume first becomes eligible. The server makes additional checks to ensure that data from a storage pool that is set up for data deduplication has been backed up to a copy storage pool. These checks require more than one BACKUP STGPOOL instance before the server reclaims a volume. After the server verifies that the data was backed up, the volume is reclaimed.

You can change this option dynamically using the SETOPT command.

Attention: To minimize the possibility of data loss, do not change the default setting for this server option. Specify a value of NO only if you do not have any copy storage pools and are not performing storage pool backups.

Syntax


>>-DEDUPREQUIRESBACKUP--+-Yes-+--------------------------------><
                        '-No--'

Parameters

Yes: Specifies that the storage pool must be backed up before volumes can be reclaimed and before duplicate data can be discarded. This is the default.
No: Specifies that volumes in primary sequential-access storage pools that are set up for data deduplication can be reclaimed and duplicate data can be discarded if the storage pools are not backed up.

Examples

Specify that primary sequential-access storage pools that are set up for data deduplication do not have to be backed up.

deduprequiresbackup no