Patents by Inventor Kaokazu Nemoto

Kaokazu Nemoto 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).

  • Computer system, computer, data access method and database system
    Patent number: 7693816
    Abstract: There is a program for transmitting a prefetch command to a database management system (DBMS) so that access data of the DBMS can be prefetched to a storage. The DBMS is able to generate an access plan conscious of prefetch and to access database (DB). The DBMS is, however, unable to recognize that a prefetch command program is halted and it cannot generate an access plan at a proper I/O cost. Database management system servers 1, 2, . . . monitor a prefetch program of a management server 5, understands that the prefetch program is halted and it can optimize an execution plan to access storage apparatus 3, 4, . . . by using an I/O cost changed when the prefetch program is halted.
    Type: Grant
    Filed: January 31, 2005
    Date of Patent: April 6, 2010
    Assignee: Hitachi, Ltd.
    Inventors: Kaokazu Nemoto, Norifumi Nishikawa, Kazuhiko Mogi