Paul E Andersen

US Patent:

8375193, Feb 12, 2013

Filed:

May 27, 2009

Appl. No.:

12/472414

Inventors:

Criselda Carrillo - San Diego CA, US
Paul Rubio - San Diego CA, US
Paul Andersen - San Diego CA, US
Donn Holtzman - San Diego CA, US

Assignee:

Teradata US, Inc. - Dayton OH

International Classification:

G06F 12/00

US Classification:

711173, 711170, 711E12001

Abstract:

The frequency with which data is accessed within the system may be periodically monitored and a corresponding access frequency quantifier assigned to the data is updated accordingly. The data access frequency quantifier may be associated with a storage device zone speed quality rating. The association between data access frequency quantifiers and the storage device zone speed quality ratings may be made in a hierarchical association such that quantifiable differentials may be ascertained between a particular access frequency quantifier and a storage device zone speed quality rating. In this manner, when no storage zone having a speed quality rating that is associated with data having a particular access frequency quantifier is available for storage of the data, a storage zone having a speed quality rating more proximate the speed quality rating associated with the access frequency quantifier may be identified for migration.

US Patent:

20070067669, Mar 22, 2007

Filed:

Sep 8, 2006

Appl. No.:

11/530144

Inventors:

John Morris - San Diego CA, US
Paul Andersen - San Diego CA, US
Gary Boggs - San Diego CA, US
Criselda Carrillo - San Diego CA, US
John Catozzi - San Diego CA, US
Peter Frazier - Princeton NJ, US

International Classification:

G06F 11/00

US Classification:

714006000

Abstract:

A technique for use in identifying a failing storage device from a plurality of such storage devices involves the use of an inconsistency map. This inconsistency map is maintained by selecting one or more protected objects and identifying the storage devices on which the protected objects are stored. Copies of the protected objects on the identified storage devices are compared. On detecting a mismatch between copies of one of the protected objects, details are stored in an inconsistency map of the mismatched protected object and details of the storage devices on which the mismatched protected object is stored.