The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 27, 2001
Filed:
Jul. 23, 1998
Patrick James Christenson, Rochester, MN (US);
Michael Joseph Corrigan, Rochester, MN (US);
Thomas Richard Crowley, Rochester, MN (US);
Michael Steven Faunce, Rochester, MN (US);
Michael James McDermott, Oronoco, MN (US);
Timothy John Mullins, Rochester, MN (US);
Glen Warren Nelson, Rochester, MN (US);
Russell Paul VanDuine, Rochester, MN (US);
Bruce Marshall Walk, Rochester, MN (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
Method and apparatus for managing data on DASD units to improve system performance comprises monitoring portions of data on a plurality of DASD units to determine the times the data is accessed within a given time period, and characterizing accessed data portions of a DASD unit as HOT and COLD data. The DASD units are monitored to determine the number of times each unit is accessed within a time period to develop utilization factors reflective of the number of times the DASD unit is accessed during the time period. HOT and COLD data is moved between DASD units based on the utilization factors of the DASD units.