Patents by Inventor Yoji Shigehata

Yoji Shigehata 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).

  • Accurate completion of transaction in cooperative type distributed system and recovery procedure for same
    Patent number: 6052695
    Abstract: The transaction processing throughput of a system in which a plurality of servers cooperatively perform distributed processing of transactions is improved. The servers (1a, 1b, 1c, . . .) are connected to each other through a communication network (2), and a resources (16) and a log 18 are distributed over these servers. When one of the servers, e.g., the server (1a) receives a transaction, the server (1a) instructs the servers (1b, 1c, . . . ) over which the resource 16 relating to this transaction are distributed to update their resources, acquires the log data representing the updating contents and stores the log data in its log (18)The servers (1b, 1c, . . .) update the resources in accordance with the instruction. Even when a fault occurs in one of the servers (1b, 1c, . . .) during the transaction processing so that the updating of the resources has not been executed, the system assumes that all the resource has been updated and proceeds to processing the following transaction.
    Type: Grant
    Filed: October 25, 1996
    Date of Patent: April 18, 2000
    Assignee: NTT Data Communications Systems Corporation
    Inventors: Kenichi Abe, Yukiharu Imafuku, Hitoshi Kirita, Toshiyuki Inoue, Hiroaki Takahashi, Yoji Shigehata, Yuichi Konno, Kazuaki Narata, Tadao Odanaka