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:
May. 29, 2012
Filed:
Jan. 29, 2009
Selwyn David Dickey, Byron, MN (US);
Timothy John Klubertanz, Rochester, MN (US);
Ginny Mahrer Mccright, Rochester, MN (US);
Jeffrey William Palm, Rochester, MN (US);
Selwyn David Dickey, Byron, MN (US);
Timothy John Klubertanz, Rochester, MN (US);
Ginny Mahrer McCright, Rochester, MN (US);
Jeffrey William Palm, Rochester, MN (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A sequence of fixed-size blocks defines a page (e.g., in a server system, storage subsystem, DASD, etc.). Each fixed-size block includes a data block and a footer. A high performance block storage metadata unit associated with the page is created from a confluence of the footers. The confluence of footers has space available for application metadata. In an embodiment, the metadata space is utilized to record a 'write activity level' metric, and a timestamp. The metric indicates the write frequency or 'hotness' of the page, and its value changes over time as the activity level changes. Frequently accessed pages may be mapped to higher performance physical disks and infrequently accessed pages may be mapped to lower power physical disks.