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. 14, 2012
Filed:
Jun. 18, 2009
Ahmed M. Bashir, San Jose, CA (US);
Prasenjit Sarkar, San Jose, CA (US);
Soumitra Sarkar, Cary, NC (US);
Mark J. Seaman, San Jose, CA (US);
Dinesh K. Subhraveti, Milpitas, CA (US);
Victor S. Wen, Berkeley, CA (US);
Ahmed M. Bashir, San Jose, CA (US);
Prasenjit Sarkar, San Jose, CA (US);
Soumitra Sarkar, Cary, NC (US);
Mark J. Seaman, San Jose, CA (US);
Dinesh K. Subhraveti, Milpitas, CA (US);
Victor S. Wen, Berkeley, CA (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method, system, and article for resolving a silent error is disclosed. A primary program copy runs on a primary host, and a secondary program copy runs on a secondary host. The primary and secondary copies communicate to maintain synchronized execution. A third copy of the data is stored on a storage device as a write operations log and maintained in memory on the primary host while the program is running. The primary copy is synchronized with the secondary copy by computing a first checksum of data on the primary host in response to a read operation local to the primary host, computing a second checksum of data on the secondary host in response to a read operation local to the secondary host, and periodically communicating the first checksum to the secondary host, and resolving any discrepancies between the first and second checksum of data reflecting a silent data error.