Patents by Inventor Minoru Kamosida

Minoru Kamosida 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 disk cache system and distributed disk cache method
    Patent number: 8166242
    Abstract: According to an aspect of the embodiment, a packet analyzing apparatus monitors a concentration level of input and output access from an access apparatus to a disk device, specifies a data area to which the concentration level of input and output access exceeds a first threshold, and instructs a storage server to cache the data area. The packet analyzing apparatus monitors a concentration level of input and output access to a data area to which the data area is cached, and, when the concentration level of input and output access is below a second threshold, instructs the storage server to release the caching.
    Type: Grant
    Filed: May 26, 2009
    Date of Patent: April 24, 2012
    Assignee: Fujitsu Limited
    Inventors: Kazuichi Oe, Tatsuo Kumano, Yasuo Noguchi, Yoshihiro Tsuchiya, Kazutaka Ogihara, Masahisa Tamura, Tetsutaro Maruyama, Takashi Watanabe, Minoru Kamosida, Shigeyuki Miyamoto
  • Recording medium storing data allocation control program, data allocation control device, data allocation control method, and multi-node storage-system
    Patent number: 8141095
    Abstract: A data allocation control program manages data allocation when data is distributively stored in a plurality of disk nodes that are shifted to a power saving mode unless access is performed for a certain time. The program produces a plurality of allocation pattern candidates each indicating the disk nodes in which the respective data are to be stored. The program calculates a no-access period expectation that represents an expected value of occurrence of a no-access period during which access is not performed to some of the disk nodes. The program selects as an allocation pattern for data reallocation, one of the plurality of produced allocation pattern candidates with the largest calculated no-access period expectation. The program instructs the disk nodes to reallocate the respective data in accordance with the selected allocation pattern.
    Type: Grant
    Filed: December 24, 2008
    Date of Patent: March 20, 2012
    Assignee: Fujitsu Limited
    Inventors: Tatsuo Kumano, Yasuo Noguchi, Kazutaka Ogihara, Masahisa Tamura, Yoshihiro Tsuchiya, Tetsutaro Maruyama, Takashi Watanabe, Riichiro Take, Kazuichi Oe, Minoru Kamosida, Shigeyuki Miyamoto
  • DISTRIBUTED DISK CACHE SYSTEM AND DISTRIBUTED DISK CACHE METHOD
    Publication number: 20090319724
    Abstract: According to an aspect of the embodiment, a packet analyzing apparatus monitors a concentration level of input and output access from an access apparatus to a disk device, specifies a data area to which the concentration level of input and output access exceeds a first threshold, and instructs a storage server to cache the data area. The packet analyzing apparatus monitors a concentration level of input and output access to a data area to which the data area is cached, and, when the concentration level of input and output access is below a second threshold, instructs the storage server to release the caching.
    Type: Application
    Filed: May 26, 2009
    Publication date: December 24, 2009
    Applicant: FUJITSU LIMITED
    Inventors: Kazuichi Oe, Tatsuo Kumano, Yasuo Noguchi, Yoshihiro Tsuchiya, Kazutaka Ogihara, Masahisa Tamura, Tetsutaro Maruyama, Takashi Watanabe, Minoru Kamosida, Shigeyuki Miyamoto
  • RECORDING MEDIUM STORING DATA ALLOCATION CONTROL PROGRAM, DATA ALLOCATION CONTROL DEVICE, DATA ALLOCATION CONTROL METHOD, AND MULTI-NODE STORAGE-SYSTEM
    Publication number: 20090254702
    Abstract: A data allocation control program manages data allocation when data is distributively stored in a plurality of disk nodes that are shifted to a power saving mode unless access is performed for a certain time. The program produces a plurality of allocation pattern candidates each indicating the disk nodes in which the respective data are to be stored. The program calculates a no-access period expectation that represents an expected value of occurrence of a no-access period during which access is not performed to some of the disk nodes. The program selects as an allocation pattern for data reallocation, one of the plurality of produced allocation pattern candidates with the largest calculated no-access period expectation. The program instructs the disk nodes to reallocate the respective data in accordance with the selected allocation pattern.
    Type: Application
    Filed: December 24, 2008
    Publication date: October 8, 2009
    Applicant: FUJITSU LIMITED
    Inventors: Tatsuo Kumano, Yasuo Noguchi, Kazutaka Ogihara, Masahisa Tamura, Yoshihiro Tsuchiya, Tetsutaro Maruyama, Takashi Watanabe, Riichiro Take, Kazuichi Oe, Minoru Kamosida, Shigeyuki Miyamoto