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:
Apr. 23, 2013
Filed:
Mar. 28, 2008
Rong Yu, Franklin, MA (US);
Orit Levin-michael, Irvine, CA (US);
Roderick M. Klinger, Hopkinton, MA (US);
Yechiel Yochai, Lincoln, RI (US);
John W. Lefferts, Sutton, MA (US);
Rong Yu, Franklin, MA (US);
Orit Levin-Michael, Irvine, CA (US);
Roderick M. Klinger, Hopkinton, MA (US);
Yechiel Yochai, Lincoln, RI (US);
John W. Lefferts, Sutton, MA (US);
EMC Corporation, Hopkinton, MA (US);
Abstract
Described are techniques for processing a data operation in a data storage system. A front-end component receives the data operation to read a data portion. In response to receiving the data operation, the front-end component performs first processing. The first processing includes determining whether the data operation is a read operation resulting in a cache hit to a prefetched data portion of a sequential stream, and if said determining determines that said data operation results in a cache hit to a prefetched data portion, performing processing in connection with prefetching additional data for said sequential stream. The processing includes determining whether to prefetch additional data for said sequential stream and, if so, an amount of additional data to prefetch. The processing uses one or more criteria to determine one or more of an amount of data to prefetch in a single prefetch request and a track ahead parameter.