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. 28, 2006
Filed:
Jun. 24, 2002
Josef Ezra, Ashland, MA (US);
Daniel Lambright, Watertown, MA (US);
Josef Ezra, Ashland, MA (US);
Daniel Lambright, Watertown, MA (US);
EMC Corporation, Hopkinton, MA (US);
Abstract
Described are techniques used in connection with cache management. Data included in a cache slot is put 'on parole' with a first cache hit while waiting for subsequent cache hits. If a subsequent hit is received to the cache slot, it remains in the cache for a longer time period than a slot having only a first cache hit. The cache may be organized as a plurality of memory banks of cache slots. Each memory bank has an associated control slot that includes groups of extents of tags. Each cache slot has a corresponding tag, and a time stamp. The time stamp of slots in the cache may be adjusted affecting the amount of time a particular portion of data remains in the cache.