Patents by Inventor Tomoaki SUGISAWA

Tomoaki SUGISAWA 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).

  • Distributed processing method and distributed processing system providing continuation of normal processing if byzantine failure occurs
    Patent number: 11106552
    Abstract: A distributed processing method to receive data by a plurality of servers each including a processor and a memory, and process the data by replicating, the method includes a first determination step in which the servers each receive the replicated data, and a first determination unit determines a degree of consistency of the received data and an output step in which the servers each receive a determination result of the degree of consistency of the data from the first determination unit, and if the determination result includes data that guarantees consistency, the server outputs the data that guarantees consistency. A first number of servers that are to receive the data is set in advance based on a prescribed allowable number of failures that defines the number of servers that can have failures, and an allowable number of byzantine failures that defines the number of servers that can have byzantine failures.
    Type: Grant
    Filed: September 5, 2019
    Date of Patent: August 31, 2021
    Assignee: HITACHI, LTD.
    Inventors: Tomoaki Sugisawa, Nobuyuki Yamamoto
  • DISTRIBUTED PROCESSING METHOD AND DISTRIBUTED PROCESSING SYSTEM
    Publication number: 20200233761
    Abstract: A distributed processing method to receive data by a plurality of servers each including a processor and a memory, and process the data by replicating, the method includes a first determination step in which the servers each receive the replicated data, and a first determination unit determines a degree of consistency of the received data and an output step in which the servers each receive a determination result of the degree of consistency of the data from the first determination unit, and if the determination result includes data that guarantees consistency, the server outputs the data that guarantees consistency. A first number of servers that are to receive the data is set in advance based on a prescribed allowable number of failures that defines the number of servers that can have failures, and an allowable number of byzantine failures that defines the number of servers that can have byzantine failures.
    Type: Application
    Filed: September 5, 2019
    Publication date: July 23, 2020
    Inventors: Tomoaki SUGISAWA, Nobuyuki YAMAMOTO