Netapp, Inc.

Ajith Balachandran

Yuedong Mu

Michael Robin Eisler

Vijay Srinath

James Namboorikandathil Joseph

Rahul Pradeep

Somesh Kumar

Ling Zheng

Techniques and components for backing up data are disclosed. A first subset of data units is selected from a plurality of data units of a storage system to create a first partial baseline for backup of the first storage system. The number of data units in the first subset of data units is determined based on a window size parameter n. Data within the storage system that has changed since a previous backup operation are identified. A first backup including the first partial baseline and the first changed data is written to a second storage system. For a data loss event, the techniques include selecting, based on a time of the determined data loss event in combination with n, the first backup and n&#x2212;1 additional backups, wherein each of the n&#x2212;1 additional backups include a partial baseline and changed data. The first backup and the n&#x2212;1 additional backups are written to a third storage system.

Data backup with rolling baselines

First partial baseline data of a first storage system is identified. First changed data of the first storage system is identified. The first changed data comprises data that has changed since a previous point in time. First backup data is written to a second storage system. The first backup data comprises the first partial baseline data and the first changed data. After writing the first backup data to the second storage system, second partial baseline data of the first storage system is identified. The second partial baseline data does not include the first partial baseline data. Second changed data of the first storage system is identified. The second changed data comprises data that has changed since writing the first backup data. Second backup data is written to the second storage system. The second backup data comprises the second partial baseline data and the second changed data.

A method implements a single system configuration for backing-up and restoring a clustered storage system. The clustered storage system contains a plurality of storage servers. A virtual volume is configured based on one or more of the plurality of storage servers. The virtual volume shields its physical implementation from a client system. A virtual backup device is configured based on a physical backup device connected with one of the plurality of storage servers. The virtual backup device shields its connectivity from the client system. The method backs-up volume data stored in the virtual volume to the virtual backup device, irrespective of which of the plurality of storage servers is utilized by the virtual volume, or which of the plurality of storage servers is connected with the physical backup device.

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Bengaluru, India

Ajith Balachandran