Patents by Inventor Hitoshi Oi

Hitoshi Oi 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).

  • Fault containment and error handling in a partitioned system with shared resources
    Patent number: 7380001
    Abstract: A system and method for fault containment and error handling within a domain in a partitioned computer system includes a system manager having read and write access to a resource definition table. The system manager is adapted to quiesce the system when failure occurs within a domain, identify an allocated resource associated with the failed domain, identify a non-failed domain, and exit the quiesce mode for the non-failed domain, thereby containing a failure within the failed domain. The system manager further handles an error within the failed domain by deallocating a resource allocated to the failed domain so that the resource becomes available to non-failed domains.
    Type: Grant
    Filed: May 17, 2002
    Date of Patent: May 27, 2008
    Assignee: Fujitsu Limited
    Inventors: Kazunori Masuyama, Yasushi Umezawa, Jeremy J. Farrell, Sudheer Miryala, Takeshi Shimizu, Hitoshi Oi, Patrick N. Conway
  • Fault containment and error handling in a partitioned system with shared resources
    Patent number: 7315895
    Abstract: A system and method for fault containment and error handling within a domain in a partitioned computer system includes a system manager having read and write access to a resource definition table. The system manager is adapted to quiesce the system when failure occurs within a domain, identify an allocated resource associated with the failed domain, identify a non-failed domain, and exit the quiesce mode for the non-failed domain, thereby containing a failure within the failed domain. The system manager further handles an error within the failed domain by deallocating a resource allocated to the failed domain so that the resource becomes available to non-failed domains.
    Type: Grant
    Filed: May 17, 2002
    Date of Patent: January 1, 2008
    Assignee: Fujitsu Limited
    Inventors: Kazunori Masuyama, Yasushi Umezawa, Jeremy J. Farrell, Sudheer Miryala, Takeshi Shimizu, Hitoshi Oi, Patrick N. Conway
  • Routing mechanism for static load balancing in a partitioned computer system with a fully connected network
    Patent number: 7159017
    Abstract: A mechanism for balancing message traffic in a multi-chassis fully interconnected computer system partitioned into multiple domains allows the system to identify I/O transactions, to route I/O transactions over inter-domain cables, and to route non-I/O transactions over intra-domain cables. This beneficially reduces message traffic congestion on intra-domain cables.
    Type: Grant
    Filed: February 15, 2002
    Date of Patent: January 2, 2007
    Assignee: Fujitsu Limited
    Inventors: Hitoshi Oi, Patrick N. Conway, Takeshi Shimizu, Kazunori Masuyama, Sudheer Miryala, Jeremy J. Farrell, Norio Kaido
  • System and method for partitioning a computer system into domains
    Patent number: 6961761
    Abstract: A domain partitioning system for a multi-node computer system is disclosed. An external server manager is coupled to a domain configuration unit by a dedicated sideband channel. The server manager has write privileges to the domain configuration unit that allows the server manager to control the domain partitioning and the routing tables. None of the domains of the computer system are permitted write access to the domain configuration unit. In one embodiment, the domain configuration unit is a set of domain partition registers and routing table registers coupled to a system interconnect.
    Type: Grant
    Filed: May 17, 2001
    Date of Patent: November 1, 2005
    Assignee: Fujitsu Limited
    Inventors: Kazunori Masuyama, Patrick N. Conway, Hitoshi Oi, Jeremy Farrell, Sudheer Miryala, Yukio Nishimura, Prabhu Murthy
  • Routing mechanism for static load balancing in a partitioned computer system with a fully connected network
    Publication number: 20030007493
    Abstract: A mechanism for balancing message traffic in a multi-chassis fully interconnected computer system partitioned into multiple domains allows the system to identify I/O transactions, to route I/O transactions over inter-domain cables, and to route non-I/O transactions over intra-domain cables. This beneficially reduces message traffic congestion on intra-domain cables.
    Type: Application
    Filed: February 15, 2002
    Publication date: January 9, 2003
    Inventors: Hitoshi Oi, Patrick N. Conway, Takeshi Shimizu, Kazunori Masuyama, Sudheer Miryala, Jeremy J. Farrell, Norio Kaido
  • Fault containment and error handling in a partitioned system with shared resources
    Publication number: 20020186711
    Abstract: A system and method for fault containment and error handling within a domain in a partitioned computer system includes a system manager having read and write access to a resource definition table. The system manager is adapted to quiesce the system when failure occurs within a domain, identify an allocated resource associated with the failed domain, identify a non-failed domain, and exit the quiesce mode for the non-failed domain, thereby containing a failure within the failed domain. The system manager further handles an error within the failed domain by deallocating a resource allocated to the failed domain so that the resource becomes available to non-failed domains.
    Type: Application
    Filed: May 17, 2002
    Publication date: December 12, 2002
    Inventors: Kazunori Masuyama, Yasushi Umezawa, Jeremy J. Farrell, Sudheer Miryala, Takeshi Shimizu, Hitoshi Oi, Patrick N. Conway
  • System and Method for partitioning a computer system into domains
    Publication number: 20020184345
    Abstract: A domain partitioning system for a multi-node computer system is disclosed. An external server manager is coupled to a domain configuration unit by a dedicated sideband channel. The server manager has write privileges to the domain configuration unit that allows the server manager to control the domain partitioning and the routing tables. None of the domains of the computer system are permitted write access to the domain configuration unit. In one embodiment, the domain configuration unit is a set of domain partition registers and routing table registers coupled to a system interconnect.
    Type: Application
    Filed: May 17, 2001
    Publication date: December 5, 2002
    Inventors: Kazunori Masuyama, Patrick N. Conway, Hitoshi Oi, Jeremy Farrell, Sudheer Kumar Rao Miryala, Yukio Nishimura, Prabhunanadan B. Narasimhamurthy