Patents by Inventor Atsuya Kumagai

Atsuya Kumagai 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).

  • Patent number: 8656406
    Abstract: In a system including a load balancer to select a virtual server to which a request is to be transferred, the load balancer includes a function to monitor resource use states of physical and virtual servers and a function to predict a packet loss occurring in a virtual switch. The request count of requests processible by each virtual server is calculated based on the resource amount available for the virtual server and a packet loss rate of the virtual switch, to thereby select a virtual server capable of processing a larger number of requests.
    Type: Grant
    Filed: March 1, 2011
    Date of Patent: February 18, 2014
    Assignee: Hitachi, Ltd.
    Inventors: Mariko Nakayama, Atsuya Kumagai, Kiminori Sugauchi, Kunihiko Toumura
  • Patent number: 8510445
    Abstract: Provided is an IT system to minimize occurrence of a bottleneck on a network while effectively making use of the bandwidth of the network. A system management apparatus collects performance information from a network device, and calculates the average value, the peak hour, and the variance from the collected performance information. In response to a request for addition of a business system, the system management apparatus builds configuration patterns of a group of virtual servers configuring the business system and monitors traffic states of the paths on the network, identifies the part of the network where the traffic quality is most degraded, and determines the pattern that includes the path which has the smallest variance in the traffic based on traffic information on the part where the communication quality is degraded identified in each pattern as the requested system configuration of the business system.
    Type: Grant
    Filed: July 15, 2010
    Date of Patent: August 13, 2013
    Assignee: Hitachi, Ltd.
    Inventors: Kiminori Sugauchi, Atsuya Kumagai
  • Patent number: 8504830
    Abstract: Erroneous deletion of data due to a collision of digest information during data de-duplication using digest information is prevented. When backup data is stored on a backup server 1100, digest information of the backup data is generated and stored in a digest information management table 4200. In addition, when a backup data storage request is made to the backup server 1100, a digest information verification control sub-program 1127 generates digest information of data to be backed up, and performs verification against the digest information of the backed up data already stored on the backup server 1100. If, by this verification, it is found that backed up data having the same digest information is already stored, de-duplication is realized by reusing the existing backed up data without newly storing the data to be backed up.
    Type: Grant
    Filed: August 21, 2009
    Date of Patent: August 6, 2013
    Assignee: Hitachi Solutions, Ltd.
    Inventors: Yohsuke Ishii, Takaki Nakamura, Atsuya Kumagai, Kazuyoshi Toyama
  • Patent number: 8463989
    Abstract: A storage device and method for ensuring the provision of data as complete files in a storage device capable of processing both block input/output I/O and file I/O. For each logical volume, an attempt is made to unmount logical units (LUs) storing files triggered by a session start request for block I/O (login request) such as iSCSI, and to recognize (mount) files of logical units triggered by a session completion request for block I/O (Logout request). Block access processing units may also create a replication of a specified logical unit and set a relevant replicated logical unit as a logical unit for access.
    Type: Grant
    Filed: June 16, 2009
    Date of Patent: June 11, 2013
    Assignee: Hitachi, Ltd.
    Inventor: Atsuya Kumagai
  • Patent number: 8433779
    Abstract: A computer subsystem is provided with a switch apparatus group that is at least one switch apparatus that is coupled to the communication network and a plurality of communication apparatuses that includes an internal management apparatus (an internal apparatus). The internal management apparatus transmits a request of a plurality of IP addresses that are allocated to the plurality of communication apparatuses to an external management apparatus that is disposed outside the computer subsystem. The external management apparatus manages whether or not each of M static IP addresses can be allocated, specifies a plurality of static IP addresses that can be allocated in response to the request, and transmits the plurality of specified static IP addresses to the internal management apparatus. The internal management apparatus allocates the plurality of static IP addresses to a plurality of internal apparatus.
    Type: Grant
    Filed: May 16, 2011
    Date of Patent: April 30, 2013
    Assignee: Hitachi, Ltd.
    Inventors: Atsuya Kumagai, Toi Miyawaki, Kiminori Sugauchi, Yutaka Kudo
  • Publication number: 20120297037
    Abstract: A computer subsystem is provided with a switch apparatus group that is at least one switch apparatus that is coupled to the communication network and a plurality of communication apparatuses that includes an internal management apparatus (an internal apparatus). The internal management apparatus transmits a request of a plurality of IP addresses that are allocated to the plurality of communication apparatuses to an external management apparatus that is disposed outside the computer subsystem. The external management apparatus manages whether or not each of M static IP addresses can be allocated, specifies a plurality of static IP addresses that can be allocated in response to the request, and transmits the plurality of specified static IP addresses to the internal management apparatus. The internal management apparatus allocates the plurality of static IP addresses to a plurality of internal apparatus.
    Type: Application
    Filed: May 16, 2011
    Publication date: November 22, 2012
    Applicant: HITACHI, LTD.
    Inventors: Atsuya Kumagai, Toi Miyawaki, Kiminori Sugauchi, Yutaka Kudo
  • Publication number: 20120030423
    Abstract: This invention ensures the provision of data as complete files in the storage device capable of processing both block I/O and file I/O. For this purpose, for each of the logical volumes, this invention attempts to unmount logical units (LUs) storing files triggered by a session start request for block I/O (login request) such as iSCSI, and to recognize (mount) files of the logical units triggered by a session completion request for block I/O (logout request) (refer to FIG. 1).
    Type: Application
    Filed: June 16, 2009
    Publication date: February 2, 2012
    Inventor: Atsuya Kumagai
  • Publication number: 20110286328
    Abstract: Provided is an IT system to minimize occurrence of a bottleneck on a network while effectively making use of the bandwidth of the network. A system management apparatus collects performance information from a network device, and calculates the average value, the peak hour, and the variance from the collected performance information. In response to a request for addition of a business system, the system management apparatus builds configuration patterns of a group of virtual servers configuring the business system and monitors traffic states of the paths on the network, identifies the part of the network where the traffic quality is most degraded, and determines the pattern that includes the path which has the smallest variance in the traffic based on traffic information on the part where the communication quality is degraded identified in each pattern as the requested system configuration of the business system.
    Type: Application
    Filed: July 15, 2010
    Publication date: November 24, 2011
    Applicant: HITACHI, LTD.
    Inventors: Kiminori SUGAUCHI, Atsuya KUMAGAI
  • Publication number: 20110280252
    Abstract: A method is provided with which a name of a virtual port is not changed when virtualized storage is moved among switches. Information about a creator and a borrower of name information is added to a table including name information and address information of a virtual port of a name server managing the name information and the address information. The name information is provided to plural switches and managed. In addition, name information, which can be used commonly among name servers managing the name information and the address information is pooled in advance, and the name information of the virtual port is borrowed from there.
    Type: Application
    Filed: July 20, 2011
    Publication date: November 17, 2011
    Applicant: Hitachi, Ltd.
    Inventors: Toshihiko Murakami, Atsuya Kumagai, Naoko Iwami
  • Publication number: 20110276982
    Abstract: In a system including a load balancer to select a virtual server to which a request is to be transferred, the load balancer includes a function to monitor resource use states of physical and virtual servers and a function to predict a packet loss occurring in a virtual switch. The request count of requests processible by each virtual server is calculated based on the resource amount available for the virtual server and a packet loss rate of the virtual switch, to thereby select a virtual server capable of processing a larger number of requests.
    Type: Application
    Filed: March 1, 2011
    Publication date: November 10, 2011
    Applicant: HITACHI, LTD.
    Inventors: Mariko Nakayama, Atsuya Kumagai, Kiminori Sugauchi, Kunihiko Toumura
  • Patent number: 7996560
    Abstract: A method is provided with which a name of a virtual port is not changed when virtualized storage is moved among switches. Information about a creator and a borrower of name information is added to a table including name information and address information of a virtual port of a name server managing the name information and the address information. The name information is provided to plural switches and managed. In addition, name information, which can be used commonly among name servers managing the name information and the address information is pooled in advance, and the name information of the virtual port is borrowed from there.
    Type: Grant
    Filed: August 28, 2003
    Date of Patent: August 9, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Toshihiko Murakami, Atsuya Kumagai, Naoko Iwami
  • Patent number: 7886186
    Abstract: In a storage system performing remote copy, when a failure occurs in a storage apparatus, optimum redundancy configuration is reestablished promptly. In the storage system performing remote copy, when a storage apparatus detects a failure in its disk drive, a storage apparatus capable of providing a logical unit that can be a replacement for the logical unit affected by the failure in the disk drive is searched for based on storage apparatus performance, and a redundancy configuration is reestablished using a new logical unit the found storage apparatus provides.
    Type: Grant
    Filed: January 3, 2008
    Date of Patent: February 8, 2011
    Assignee: Hitachi, Ltd.
    Inventor: Atsuya Kumagai
  • Patent number: 7783833
    Abstract: A storage system includes one or more host computers; and a storage controller that provides each of the one or more host computers with a plurality of logical volumes, each including a storage area for reading/writing data from/to, and also being either allocated or not allocated to one or more of the host computers, the storage controller including: an identification unit that identifies function information relating to a logical volume from among the plurality of logical volumes included in information relating to the plurality of logical volumes based on a command from a host computer from among the one or more host computers; and an execution unit that executes processing on the logical volume in accordance with an identification result of the identification unit.
    Type: Grant
    Filed: June 12, 2008
    Date of Patent: August 24, 2010
    Assignee: Hitachi, Ltd.
    Inventor: Atsuya Kumagai
  • Patent number: 7774543
    Abstract: The present invention provides a storage system, a method for managing the same, and a storage controller, to obtain a storage apparatus that uses iSCSI protocol, which makes it possible for each user to configure the necessary settings within the scope of their provided right.
    Type: Grant
    Filed: November 14, 2006
    Date of Patent: August 10, 2010
    Assignee: Hitachi, Ltd
    Inventor: Atsuya Kumagai
  • Publication number: 20100070764
    Abstract: Erroneous deletion of data due to a collision of digest information during data de-duplication using digest information is prevented. When backup data is stored on a backup server 1100, digest information of the backup data is generated and stored in a digest information management table 4200. In addition, when a backup data storage request is made to the backup server 1100, a digest information verification control sub-program 1127 generates digest information of data to be backed up, and performs verification against the digest information of the backed up data already stored on the backup server 1100. If, by this verification, it is found that backed up data having the same digest information is already stored, de-duplication is realized by reusing the existing backed up data without newly storing the data to be backed up.
    Type: Application
    Filed: August 21, 2009
    Publication date: March 18, 2010
    Applicant: HITACHI SOFTWARE ENGINEERING CO., LTD.
    Inventors: Yohsuke ISHII, Takaki NAKAMURA, Atsuya KUMAGAI, Kazuyoshi TOYAMA
  • Publication number: 20090006735
    Abstract: A storage unit is provided which is connected to a host computer through a network, having one or more disks in which read and write operations are performed during rotation and a control unit for controlling the rotation of the disks. In the storage unit, when receiving a message which is sent from the host computer and predicts that at least one of the disks will come in use, the control unit causes the at least one of the disks which will come in use, to rotate.
    Type: Application
    Filed: June 5, 2008
    Publication date: January 1, 2009
    Inventors: Atsuya Kumagai, Kenta Shiga, Takashige Iwamura
  • Patent number: 7464184
    Abstract: In a computer system having a storage device, switches and hosts respectively connected by a network, in accordance with an ID of a logical volume of the storage device and an IP address of a host, access control configuration of the logical volume is performed relative to the storage device, the IP address of the host is converted into a MAC address, the MAC address of the host is converted into a port ID of the switch connected to the host, and addition of the port to virtual local area network (VLAN) is performed for the switch. Logical unit number (LUN) masking and VLAN configuration essential for security countermeasure of IP-SAN (Internet protocol-storage area network) can be managed collectively by a system administrator so that the running cost of IP-SAN can be lowered.
    Type: Grant
    Filed: July 27, 2006
    Date of Patent: December 9, 2008
    Assignee: Hitachi, Ltd.
    Inventors: Kenta Shiga, Atsuya Kumagai, Keisei Fujiwara
  • Patent number: 7451204
    Abstract: In a computer system having a storage device switches and hosts respectively connected by a network, in accordance with an ID of a logical volume of the storage device and an IP address of a host, access control configuration of the logical volume is performed relative to the storage device, the IP address of the host is converted into a MAC address, the MAC address of the host is converted into a port ID of the switch connected to the host, and addition of the port to virtual local area network (VLAN) is performed for the switch. Logical unit number (LUN) masking and VLAN configuration essential for security countermeasure of IP-SAN (Internet protocol-storage area network) can be managed collectively by a system administrator so that the running cost of IP-SAN can be lowered.
    Type: Grant
    Filed: July 5, 2006
    Date of Patent: November 11, 2008
    Assignee: Hitachi, Ltd.
    Inventors: Kenta Shiga, Atsuya Kumagai, Keisei Fujiwara
  • Publication number: 20080256308
    Abstract: A storage system includes one or more host computers; and a storage controller that provides each of the one or more host computers with a plurality of logical volumes, each including a storage area for reading/writing data from/to, and also being either allocated or not allocated to one or more of the host computers, the storage controller including: an identification unit that identifies function information relating to a logical volume from among the plurality of logical volumes included in information relating to the plurality of logical volumes based on a command from a host computer from among the one or more host computers; and an execution unit that executes processing on the logical volume in accordance with an identification result of the identification unit.
    Type: Application
    Filed: June 12, 2008
    Publication date: October 16, 2008
    Inventor: Atsuya Kumagai
  • Publication number: 20080244306
    Abstract: In a storage system performing remote copy, when a failure occurs in a storage apparatus, optimum redundancy configuration is reestablished promptly. In the storage system performing remote copy, when a storage apparatus detects a failure in its disk drive, a storage apparatus capable of providing a logical unit that can be a replacement for the logical unit affected by the failure in the disk drive is searched for based on storage apparatus performance, and a redundancy configuration is reestablished using a new logical unit the found storage apparatus provides.
    Type: Application
    Filed: January 3, 2008
    Publication date: October 2, 2008
    Inventor: Atsuya KUMAGAI