Self recovery

• US 8,484,505 B1
• Filed: 09/30/2010
• Issued: 07/09/2013
• Est. Priority Date: 09/30/2010
• Status: Active Grant

• Current Assignee: Emc IP Holding Company LLC (Dell Technologies Inc.)
• Original Assignee: EMC Corporation (Dell Technologies Inc.)
• Inventors: Dutch, Michael John, Claudatos, Christopher Hercules, Rao, Mandavilli Navneeth
• Primary Examiner(s): LE, DIEU MINH T
• Application Number:
  US12/895,841
• Time in Patent Office: 1,013 Days
• Field of Search: 714/2, 714/6.1, 714/6.11, 714/6.12, 714/6.13, 714/6.2, 714/6.21, 714/6.22, 714/6.23, 714/6.3, 714/6.31, 714/15, 714/16, 714/20
• US Class Current: 714/6.1
• CPC Class Codes: G06F 11/1451 by selection of backup contents
• CPC Class Codes: G06F 11/1469 Backup restoration techniques
• CPC Class Codes: G06F 16/21 Design, administration or maintenance of databases

Abstract

A method, article of manufacture, and apparatus for restoring data. In some embodiments, this includes receiving a request from a requestor to recover an object, determining segments of the object, identifying any segments of the object residing in the requestor, and processing the recovery request based on the identified segments residing in the requestor. In some embodiments, segments of the object includes hash values of the object. In some embodiments, processing the recovery request based on the determined segments includes using the identified segments residing in the requestor to reconstitute the object.

Claims

1. A method for restoring data, comprising:

receiving a request from a requestor to recover an object that has been previously backed up, wherein the object was segmented into a plurality of segments by a backup service;

determining, based at least in part on a data index, whether the object as previously backed up resides at the requestor;

in the event that the object as previously backed up is determined to not reside at the requestor, determining segments of the previously backed up object;

identifying determined segments of the previously backed up object that are residing in the requestor; and

processing the recovery request to recover the previously backed up object based at least in part on the segments identified to be residing in the requestor.

2. The method as recited in claim 1, wherein segments of the object includes hash values of the object.

3. The method as recited in claim 1, wherein processing the recovery request based on the determined segments includes using the identified segments residing in the requestor to reconstitute the object.

4. The method as recited in claim 1, wherein the determined segments and the identified segments are the same segments.

5. The method as recited in claim 1, wherein the determined segments and the identified segments are not the same segments.

6. The method as recited in claim 5, further comprising searching for the determined segments which are not identified segments on a remote data source system.

7. The method as recited in claim 6, wherein the remote data source system may be a protected system distinct from the requestor.

8. The method as recited in claim 1, wherein segments of the object residing in the requestor are identified based at least in part on the data index.

9. A system for restoring data, comprising one or more processors configured to:

receive a request from a requestor to recover an object that has been previously backed up, wherein the object was segmented into a plurality of segments by a backup service;

determine, based at least in part on a data index, whether the object as previously backed up resides at the requestor;

in the event that the object as previously backed up is determined to not reside at the requestor, determine segments of the previously backed up object;

identify determined segments of the previously backed up object that are residing in the requestor; and

process the recovery request to recover the previously backed up object based at least in part on the segments identified to be residing in the requestor.

10. The system as recited in claim 9, wherein segments of the object includes hash values of the object.

11. The system as recited in claim 9, wherein process the recovery request based on the determined segments includes use the identified segments residing in the requestor to reconstitute the object.

12. The system as recited in claim 9, wherein the determined segments and the identified segments are the same segments.

13. The system as recited in claim 9, wherein segments of the object residing in the requestor are identified based at least in part on the data index.

14. A computer program product for restoring data, comprising a non-transitory computer usable medium having machine readable code embodied therein for:

receiving a request from a requestor to recover an object that has been previously backed up, wherein the object was segmented into a plurality of segments by a backup service;

determining, based at least in part on a data index, whether the object as previously backed up resides at the requestor;

in the event that the object as previously backed up is determined to not reside at the requestor, determining segments of the previously backed up object;

identifying determined segments of the previously backed up object that are residing in the requestor; and

processing the recovery request to recover the previously backed up object based at least in part on the segments identified to be residing in the requestor.

15. The computer program product as recited in claim 14, wherein segments of the object includes hash values of the object.

16. The computer program product as recited in claim 14, wherein processing the recovery request based on the determined segments includes using the identified segments residing in the requestor to reconstitute the object.

17. The computer program product as recited in claim 14, wherein the determined segments and the identified segments are the same segments.

18. The computer program product as recited in claim 14, wherein the determined segments and the identified segments are not the same segments.

19. The computer program product as recited in claim 18, further comprising machine readable code for searching for the determined segments which are not identified segments on a remote data source system.

20. The computer program product as recited in claim 19, wherein the remote data source system may be a protected system distinct from the requestor.

21. The computer program product as recited in claim 14, wherein segments of the object residing in the requestor are identified based at least in part on the data index.