Unified recovery

• US 8,713,364 B1
• Filed: 12/31/2010
• Issued: 04/29/2014
• 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): Ehne, Charles
• Application Number:
  US12/983,151
• Time in Patent Office: 1,215 Days
• Field of Search: 714/4.1, 714/4.11, 714/6.3, 714/15
• US Class Current: 714/15
• CPC Class Codes: G06F 11/1453 using de-duplication of the data
• CPC Class Codes: G06F 11/1469 Backup restoration techniques

Abstract

A method, article of manufacture, and apparatus for restoring data. In some embodiments, this includes determining an object to be recovered to a client, recovering at least a first portion of the object from a local resource, and recovering at least a second portion of the object from a first remote resource. In some embodiments, this may include recovering at least a third portion of the object from a second remote resource. In some embodiments, the first remote resource may be a backup server, and the second remote resource may be an other client.

Claims

1. A method for restoring data, comprising:

receiving a request to recover an object comprising a plurality of portions to a client;

determining, using a processor, a plurality of resources from which to recover the plurality of portions comprising the requested object based at least in part on a data index, wherein the plurality of resources includes a local resource and at least one remote resource;

recovering at least a first portion of the requested object from the local resource, wherein the first portion of the requested object is associated with a first object stored at the local resource;

recovering at least a second portion of the object from the at least one remote resources, wherein the second portion of the requested object is associated with a second object stored at the at least one remote resources; and

reconstructing the requested object from at least the first and second portions of the requested object recovered respectively from the local resource and the at least one remote resource;

wherein the determination of the plurality of resources, the recovery of portions of the requested object from the local and remote resources, and the reconstruction of the requested object are transparent to the client requesting recovery of the object.

2. The method as recited in claim 1, wherein the at least a second portion of the object includes a hash portion of the second object.

3. The method as recited in claim 1, wherein the first remote resource includes a backup server.

4. The method as recited in claim 1, wherein the first remote resource includes other clients.

5. The method as recited in claim 1, further comprising recovering at least a third portion of the object from a second remote resource.

6. The method as recited in claim 5, wherein the first remote resource is a backup server and the second remote resource is another client.

7. The method as recited in claim 6, wherein the backup server has a copy of the object.

8. The method as recited in claim 1, wherein the data index includes information associated with portions that comprise at least the first object and the second object, and wherein the information includes a hash of the portions.

9. A system for restoring data, comprising a processor configured to:

receive a request to recover an object comprising a plurality of portions to a client;

determine a plurality of resources from which to recover the plurality of portions comprising the requested object based at least in part on a data index, wherein the plurality of resources includes a local resource and at least one remote resource;

recover at least a first portion of the requested object from the local resource, wherein the first portion of the requested object is associated with a first object stored at the local resource;

recover at least a second portion of the object from the at least one remote resources, wherein the second portion of the requested object is associated with a second object stored at the at least one remote resources; and

reconstruct the requested object from at least the first and second portions of the requested object recovered respectively from the local resource and the at least one remote resource;

wherein the determination of the plurality of resources, the recovery of portions of the requested object from the local and remote resources, and the reconstruction of the requested object are transparent to the client requesting recovery of the object.

10. The system as recited in claim 9, wherein the at least a second portion of the object includes a hash portion of the second object.

11. The system as recited in claim 9, the processor further configured to recover at least a third portion of the object from a second remote resource.

12. The system as recited in claim 11, wherein the first remote resource is a backup server and the second remote resource is another client.

13. The system as recited in claim 12, wherein the backup server has a copy of the object.

14. The system as recited in claim 9, wherein the data index includes information associated with portions that comprise at least the first object and the second object, and wherein the information includes a hash of the portions.

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

receiving a request to recover an object comprising a plurality of portions to a client;

determining a plurality of resources from which to recover the plurality of portions comprising the requested object based at least in part on a data index, wherein the plurality of resources includes a local resource and at least one remote resource;

recovering at least a first portion of the requested object from the local resource, wherein the first portion of the requested object is associated with a first object stored at the local resource;

recovering at least a second portion of the object from the at least one remote resources, wherein the second portion of the requested object is associated with a second object stored at the at least one remote resources; and

reconstructing the requested object from at least the first and second portions of the requested object recovered respectively from the local resource and the at least one remote resource;

wherein the determination of the plurality of resources, the recovery of portions of the requested object from the local and remote resources, and the reconstruction of the requested object are transparent to the client requesting recovery of the object.

16. The computer program product as recited in claim 15, wherein the at least a second portion of the object includes a hash portion of the second object.

17. The computer program product as recited in claim 15, wherein the first remote resource includes a backup server.

18. The computer program product as recited in claim 15, wherein the first remote resource includes other clients.

19. The computer program product as recited in claim 15, further comprising machine readable code for recovering at least a third portion of the object from a second remote resource.

20. The computer program product as recited in claim 19, wherein the first remote resource is a backup server and the second remote resource is another client.

21. The computer program product as recited in claim 20, wherein the backup server has a copy of the object.

22. The computer program product as recited in claim 15, wherein the data index includes information associated with portions that comprise at least the first object and the second object, and wherein the information includes a hash of the portions.