Paul F Mcgrath

US Patent:

8407445, Mar 26, 2013

Filed:

Mar 31, 2010

Appl. No.:

12/751665

Inventors:

Saurabh Pathak - Cary NC, US
David Haase - Fuquay Varina NC, US
Miles de Forest - Bahama NC, US
Paul T. McGrath - Raleigh NC, US

Assignee:

EMC Corporation - Hopkinton MA

International Classification:

G06F 12/02

US Classification:

711170, 711114

Abstract:

Systems, methods, and computer readable media for triggering and coordinating pool storage reclamation are disclosed. According to one example, the method includes receiving an issued hint triggered by the execution of a data storage optimization operation applied to a mapped logical unit (MLU), wherein the MLU is one of a plurality of MLUs residing in a storage array, and computing an unused portion amount of an allocated storage space in the MLU, wherein the allocated storage space comprises a plurality of slices. If the unused portion amount exceeds a predetermined threshold value, detecting at least one of the slices to be released from the allocated storage space. The method also includes transferring data contained in a detected slice to at least one of the remaining slices in the allocated storage space, and removing the detected slice from the allocated storage space in the MLU to a common storage pool in the storage array, wherein the removed slice is allocated to any one of the plurality of MLUs.

US Patent:

8479046, Jul 2, 2013

Filed:

Jun 28, 2010

Appl. No.:

12/824966

Inventors:

Charles Christopher Bailey - Cary NC, US
Miles Aram de Forest - Bahama NC, US
David Haase - Fuquay Varina NC, US
Saurabh M. Pathak - Jersey City NJ, US
Chetan Rameshchandra Vaidya - Morrisville NC, US
Paul T. McGrath - Raleigh NC, US

Assignee:

EMC Corporation - Hopkinton MA

International Classification:

G06F 11/00

US Classification:

714 25, 714 48, 714 2

Abstract:

Systems, methods, and computer readable media for tracking storage pool reservations are disclosed. According to one aspect, the subject matter described herein includes a system for tracking storage pool reservations. The system includes a storage entity having data storage space for storing data, the data storage space being divided into a plurality of slices. The system also includes one or more portions of non-volatile memory, different from the data storage space, for storing slice reservation statistics and information about requests that affect slice reservation statistics, wherein storing information in the portion of non-volatile memory is an atomic operation. The system further includes a control module for receiving a request that affect slice reservation statistics, storing information about the request in the portion of non-volatile memory, performing the request, and updating the slice reservation statistics and clearing the information about the request in the portion of non-volatile memory.

US Patent:

55229913, Jun 4, 1996

Filed:

Jul 20, 1994

Appl. No.:

8/277806

Inventors:

Ronald Tuccelli - Winchester MA
Paul V. McGrath - Bedford MA

Assignee:

Millipore Investment Holdings Limited - Wilmington DE

International Classification:

B01D 7116

US Classification:

210490

Abstract:

A cellulosic ultrafiltration membrane is provided having a microporous base resistant substrate and an ultrafiltration layer form of a cellulose ester or cellulose.