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:
Feb. 11, 1992
Filed:
Feb. 09, 1990
Gerald P Bozman, Oakland, NJ (US);
George Eisenberger, White Plains, NY (US);
Alexander S Lett, Mahopac, NY (US);
James J Myers, San Francisco, CA (US);
William H Tetzlaff, Mount Kisco, NY (US);
Jay H Unger, Mohegan Lake, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method to manage the access of data or pages mapped into a very large virtual external address space through a cache without disturbing the logical view of the data and without having to assign physical or real backing store to said logical view. A data cache is used in which pages are indexed according to a logical address intermediate to their virtual address and their physical location in external storage. Pages common to two or more files are updated in place in the cache, while pages bound to only one file are shadow copied.