Michael J Healey

US Patent:

8200923, Jun 12, 2012

Filed:

Dec 31, 2008

Appl. No.:

12/347447

Inventors:

Michael W. Healey - North Grosvenordale CT, US
J. Michael Dunbar - Brimfield MA, US
Avinash Kallat - Marlborough MA, US
Michael Craig Fishman - Southboro MA, US

Assignee:

EMC Corporation - Hopkinton MA

International Classification:

G06F 12/16

US Classification:

711162, 711108, 711154, 711E12103

Abstract:

Techniques for performing de-duplication for data blocks in a computer storage environment. At least one chunking/hashing unit receives input data from a source and processes it to output data blocks and content addresses for them. In one aspect, the chunking/hashing unit outputs all blocks without checking to see whether any is a duplicate of a block previously stored on the storage environment. In another aspect, each data block is processed by one of a plurality of distributed object addressable storage (OAS) devices that each is selected to process data blocks having content addresses with a particular range. The OAS devices determine whether each received data block is a duplicate of another previously stored on the computer storage environment, and when it is not, stores the data block.

US Patent:

8478951, Jul 2, 2013

Filed:

Apr 13, 2012

Appl. No.:

13/447048

Inventors:

Michael W. Healey - North Grosvenordale CT, US
J. Michael Dunbar - Brimfield MA, US
Avinash Kallat - Marlborough MA, US
Michael Craig Fishman - Southboro MA, US

Assignee:

EMC Corporation - Hopkinton MA

International Classification:

G06F 12/16

US Classification:

711161, 711108, 711154, 711E12103

Abstract:

Techniques for performing de-duplication for data blocks in a computer storage environment. At least one chunking/hashing unit receives input data from a source and processes it to output data blocks and content addresses for them. In one aspect, the chunking/hashing unit outputs all blocks without checking to see whether any is a duplicate of a block previously stored on the storage environment. In another aspect, each data block is processed by one of a plurality of distributed object addressable storage (OAS) devices that each is selected to process data blocks having content addresses with a particular range. The OAS devices determine whether each received to data block is a duplicate of another previously stored on the computer storage environment, and when it is not, stores the data block.