NDMP backup operations using Celerra file server-integrated checkpoints

When the Tivoli® Storage Manager server initiates an NDMP backup operation on a Celerra data mover, the backup of a large file system might take several hours to complete. Without Celerra integrated checkpoints, any changes that occur on the file system are written to the backup image.

As a result, the backup image includes changes that are made to the file system during the entire backup operation. The backup image is not a true point-in-time image of the file system.

If you are performing NDMP backup operations from Celerra file servers, upgrade the operating system of your data mover to Celerra file server version T5.5.25.1 or later. This version of the operating system allows enablement of integrated checkpoints for all NDMP backup operations from the Celerra Control Workstation. By enabling this feature, you ensure that the backup data represents true point-in-time images of the file system that is being backed up.

For instructions about enabling integrated checkpoints during all NDMP backup operations, see the Celerra file server documentation.

If your version of the Celerra file server operating system is earlier than version T5.5.25.1 and if you use NDMP to back up Celerra data movers, manually generate a snapshot of the file system by using Celerra's command-line checkpoint feature. Then, initiate an NDMP backup operation for the checkpoint file system rather than the original file system.

For instructions about creating and scheduling checkpoints from the Celerra control workstation, see the Celerra file server documentation.