Patents by Inventor Victor S. Wen

Victor S. Wen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Detecting and recovering from silent data errors in application cloning systems
    Patent number: 8117496
    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.
    Type: Grant
    Filed: June 18, 2009
    Date of Patent: February 14, 2012
    Assignee: International Business Machines Corporation
    Inventors: Ahmed M. Bashir, Prasenjit Sarkar, Soumitra Sarkar, Mark J. Seaman, Dinesh K. Subhraveti, Victor S. Wen
  • Detecting and Recovering from Silent Data Errors in Application Cloning Systems
    Publication number: 20100325500
    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.
    Type: Application
    Filed: June 18, 2009
    Publication date: December 23, 2010
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Ahmed M. Bashir, Prasenjit Sarkar, Soumitra Sarkar, Mark J. Seaman, Dinesh K. Subhraveti, Victor S. Wen