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. 23, 2006
Filed:
Jun. 26, 2003
David Meiri, Cambridge, MA (US);
Mark J. Halstead, Watertown, MA (US);
Benjamin W. Yoder, Framingham, MA (US);
Haim Kopylovitz, Newton, MA (US);
Hana Moreshet, Framingham, MA (US);
David Meiri, Cambridge, MA (US);
Mark J. Halstead, Watertown, MA (US);
Benjamin W. Yoder, Framingham, MA (US);
Haim Kopylovitz, Newton, MA (US);
Hana Moreshet, Framingham, MA (US);
EMC Corporation, Hopkinton, MA (US);
Abstract
Reading desired data from a remote storage device that receives chunks of data from an other storage device includes determining if the desired data is part of a chunk of data committed by the other storage device, if the desired data is not part of a chunk of data committed by the other storage device, reading the desired data from a corresponding standard logical device, and if the desired data is part of a chunk of data committed by the other storage device, transferring the desired data to the standard logical device and obtaining the desired data from one of: the standard logical device after transferring the desired data thereto and the chunk of data committed by the other storage device. Reading desired data from a remote storage device may also include, if the desired data is part of a chunk of data committed by the other storage device, locking a corresponding slot of a cache only virtual device that points to the desired data. Reading desired data from a remote storage device may also include, locking a corresponding slot of the standard logical device, merging corresponding cache slots, and causing the corresponding slot of the cache only virtual device to point to the standard logical device.