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:
Oct. 04, 2005
Filed:
Jul. 31, 2002
Edward Gustav Chron, Santa Clara, CA (US);
Jaishankar Moothedath Menon, San Jose, CA (US);
Edward Gustav Chron, Santa Clara, CA (US);
Jaishankar Moothedath Menon, San Jose, CA (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A data storage system and method for providing consistent data to multiple clients based on data modification information as existing data is updated and new data is written to the system. The information indicates the modification status of each data block and identifies which data blocks have been modified during a certain time interval. The clients may query and update the modification information by submitting requests through a request processor. The data modification information includes an Altered Block Map that indicates block modification status and a Toggle Block Map that identifies which blocks have been modified. The system further includes a Modification Counter a Pending Reset Counter for improved recognition and handling of the modified data.