Patents by Inventor Yoshinori Ohira

Yoshinori Ohira 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: 11372755
    Abstract: A storage system monitors the first access frequency of occurrence which is the access frequency of occurrence from a host device during a first period, and the second access frequency of occurrence which is the access frequency of occurrence from a host device during a second period shorter than the first period. Along with performing data relocation among the tiers (levels) in the first period cycle based on the first access frequency of occurrence, the storage system performs a decision whether or not to perform a second relocation based on the first access frequency of occurrence and the second access frequency of occurrence, synchronously with access from a host device. Here the threshold value utilized in a decision on whether or not to perform the first relocation is different from the threshold value utilized in a decision on whether or not to perform the second relocation.
    Type: Grant
    Filed: July 17, 2020
    Date of Patent: June 28, 2022
    Assignee: HITACHI, LTD.
    Inventors: Hiroaki Akutsu, Akira Yamamoto, Shigeo Homma, Masanobu Yamamoto, Yoshinori Ohira
  • Publication number: 20220147456
    Abstract: In a complex system including; one or more storage systems including a cache and a storage controller; and one or more storage boxes including a storage medium, the storage box generates redundant data from write data received from a server, and writes the write data and the redundant data to the storage medium. The storage box transmits the write data to the storage system when it is difficult to generate the redundant data or it is difficult to write the write data and the redundant data to the storage medium. The storage system stores the received write data in the cache.
    Type: Application
    Filed: January 20, 2022
    Publication date: May 12, 2022
    Inventors: Akira YAMAMOTO, Ryosuke TATSUMI, Yoshinori OHIRA, Junji OGAWA
  • Patent number: 11330056
    Abstract: A possible performance bottleneck associated with insufficient network bands is mitigated to allow improvement of access performance of a storage system. A storage system includes a first node with a storage medium of storage and a plurality of second nodes each with a controller function for the storage, and is communicatively connected to a host providing an access request to the storage. One of the plurality of second nodes is determined to be a node to which a controller function executing access processing on the storage is assigned on the basis of a first amount of data transfer between the second node and the host and a second amount of data transfer between the second node and the first node.
    Type: Grant
    Filed: September 11, 2020
    Date of Patent: May 10, 2022
    Assignee: Hitachi, Ltd.
    Inventors: Shugo Ogawa, Ryosuke Tatsumi, Yoshinori Ohira, Koji Hosogi
  • Publication number: 20220107747
    Abstract: Each server stores metadata for managing a volume having a logical block mapped to physical blocks of storage devices, and provides a compute host with the volume according to the metadata. A computer system calculates the metadata amount, which is the data amount of the metadata of the volume, for each volume, determines a migration target volume from the volumes based on each metadata amount, and performs volume migration that transfers the computer node that provides the compute host with the migration target volume to a migration destination computer node.
    Type: Application
    Filed: February 26, 2021
    Publication date: April 7, 2022
    Applicant: Hitachi, Ltd.
    Inventors: Hiroto Ebara, Yoshinori Ohira, Takaki Nakamura, Masakuni Agetsuma
  • Publication number: 20220100547
    Abstract: A compound storage system including: a storage box having a plurality of storage devices; and a plurality of servers capable of executing one or more virtual machines. The storage box stores a logical volume. The virtual machines executable by the server include an application VM and a controller VM. When a predetermined situation occurs in which an application VM of a migration source server is migrated to a predetermined migration destination server, at least one processor of the one or more servers in the compound storage system migrates the application VM to the migration destination server, and migrates a control right of a logical volume used by the application VM to a controller VM of the migration destination server.
    Type: Application
    Filed: February 26, 2021
    Publication date: March 31, 2022
    Applicant: Hitachi, Ltd.
    Inventors: Akira Yamamoto, Hiroto Ebara, Takaki Nakamura, Yoshinori Ohira
  • Publication number: 20220100565
    Abstract: The computer system includes a node including a processor and a memory, and the processor and the memory serve as arithmetic operation resources. The computer system has an application program that operates using the arithmetic operation resources, and a storage controlling program that operates using the arithmetic operation resources for processing data to be inputted to and outputted from a storage device by the application program. The computer system has use resource amount information that associates operation states of the application program and the arithmetic operation resources that are to be used by the application program and the storage controlling program. The computer system changes allocation of the arithmetic operation resources to the application program and the storage controlling program used by the application program on the basis of an operation state of the application program and the use resource amount information.
    Type: Application
    Filed: March 19, 2021
    Publication date: March 31, 2022
    Applicant: HITACHI, LTD.
    Inventors: Kohei TATARA, Yoshinori OHIRA, Masakuni AGETSUMA
  • Publication number: 20220058044
    Abstract: A managing node includes a processor and a storage unit. A processor rearranges virtual machines arranged in managed nodes with high usage rates to other managed nodes based on a standard deviation of the usage rate of a CPU in a plurality of managed nodes, and selects the managed nodes in which many images of operating systems used by the virtual machine are stored, arranges the virtual machine, and starts up the virtual machine when a client starts up the virtual machine.
    Type: Application
    Filed: March 22, 2021
    Publication date: February 24, 2022
    Inventors: Taisuke ONO, Kohei TATARA, Masakuni AGETSUMA, Yoshinori OHIRA
  • Patent number: 11237962
    Abstract: In a complex system including; one or more storage systems including a cache and a storage controller; and one or more storage boxes including a storage medium, the storage box generates redundant data from write data received from a server, and writes the write data and the redundant data to the storage medium. The storage box transmits the write data to the storage system when it is difficult to generate the redundant data or it is difficult to write the write data and the redundant data to the storage medium. The storage system stores the received write data in the cache.
    Type: Grant
    Filed: September 11, 2020
    Date of Patent: February 1, 2022
    Assignee: HITACHI, LTD.
    Inventors: Akira Yamamoto, Ryosuke Tatsumi, Yoshinori Ohira, Junji Ogawa
  • Patent number: 11237745
    Abstract: To more effectively eliminate a resource imbalance among storage apparatuses, and shorten the time required for elimination in a computer system including a plurality of storage apparatuses and a computer. In a computer system including a plurality of storage apparatuses that provide a volume to a computer and a storage management device that manages the plurality of storage apparatuses, in a case where there is an instruction to create a new volume, the storage management device compares a distribution of feature amounts of all volumes provided by each storage apparatus and a distribution of feature amounts of all volumes in a case of providing a newly created volume in each storage apparatus, and instructs a storage apparatus having a largest difference in the distributions of the feature amounts to create a volume.
    Type: Grant
    Filed: August 28, 2019
    Date of Patent: February 1, 2022
    Assignee: Hitachi, Ltd.
    Inventors: Takaki Nakamura, Hideo Saito, Yoshinori Ohira, Azusa Jin
  • Publication number: 20220027070
    Abstract: Provided is a storage system and a storage management method, aiming at reducing data movement amount necessary for using an expanded capacity in a distributed RAID. When only A (A is a positive integer) physical storage drives are added, a storage controller selects virtual parcels that are mapped to different physical storage drives among N physical storage drives and are included in different virtual chunks, changes an arrangement of the selected virtual parcels to the added A physical storage drives, and constitutes a new chunk based on unallocated virtual parcels selected from different physical storage drives among the (N+A) physical storage drives.
    Type: Application
    Filed: October 7, 2021
    Publication date: January 27, 2022
    Applicant: HITACHI, LTD.
    Inventors: Hiroki FUJII, Yoshinori OHIRA, Takeru CHIBA, Yoshiaki DEGUCHI
  • Publication number: 20210405890
    Abstract: The storage part receives an I/O request including the ID of software, information regarding a storage area to and from which the software performs input and output, and a token. The storage part checks the I/O request against the software ID, the information regarding the storage area, and the token received from an I/O control part so as to determine whether access to the storage part is allowed. Upon determination that the access to the storage part is allowed, the storage part processes the I/O request.
    Type: Application
    Filed: March 4, 2021
    Publication date: December 30, 2021
    Inventors: Tatsuya HIRAI, Takahiro YAMAMOTO, Hiroto EBARA, Masakuni AGETSUMA, Yoshinori OHIRA
  • Publication number: 20210389990
    Abstract: A computer system is constituted by a plurality of physical computers including a first physical computer and a second physical computer. One or more application instances that perform an application service and a storage service instance that provides a storage service including a volume used by the application instance operate on the first physical computer. The computer system predicts a future resource usage status of the first physical computer, creates a plan to move the one or more application instances operating on the first physical computer to the second physical computer based on the predicted future resource usage status, and executes the created plan.
    Type: Application
    Filed: March 12, 2021
    Publication date: December 16, 2021
    Inventors: Takaki NAKAMURA, Hitoshi KAMEI, Yuki SAKASHITA, Yoshinori OHIRA, Masakuni AGETSUMA
  • Patent number: 11201788
    Abstract: In a distributed computing system, a bottleneck for performance of a network is avoided and a high-performance scalable resource management function is achieved. The distributed computing system includes a plurality of components connected to each other via a network. Each of the components includes a plurality of compute nodes, a plurality of drive casings, and a plurality of storage devices. The network includes a plurality of network switches and is configured in layers. When a storage region is to be allocated to a compute node among the compute nodes, a managing unit selects, from the storage devices, a storage device related to the storage region to be allocated or selects, from the drives, a drive casing related to the storage region to be allocated, based on a network distance between two of the compute node, the storage device, and the drive casing.
    Type: Grant
    Filed: September 9, 2020
    Date of Patent: December 14, 2021
    Assignee: HITACHI, LTD.
    Inventors: Ryosuke Tatsumi, Akira Yamamoto, Shugo Ogawa, Yoshinori Ohira, Koji Hosogi
  • Patent number: 11188243
    Abstract: Even though storage systems are different in types, storage pools in a plurality of storage systems are integrated, and a storage volume is created in a suited storage pool corresponding to a storage requirements. In an information system where a plurality of storage systems (a disk array, an SDS system, and an HCI system) is present, when creating the storage volume using requested storage requirements as parameters, a storage management server selects a storage pool that satisfies the storage requirements based on comparison of the storage requirements and characteristic information held in first management information (a storage pool management table), the server creates the storage volume in the selected storage pool, and the server adds an entry relating to the created storage volume to second management information (a volume management table).
    Type: Grant
    Filed: February 28, 2020
    Date of Patent: November 30, 2021
    Assignee: Hitachi, Ltd.
    Inventors: Masanori Takata, Yoshinori Ohira, Hideo Saito, Masakuni Agetsuma
  • Publication number: 20210334043
    Abstract: A technology for making effective use of resources of a storage system is provided. The storage system includes: a plurality of storage devices that store data; and a plurality of controllers that process data input to and output from the storage devices, at least one of the controllers is capable of executing function processing on the data input to and output from the storage devices, and the storage system includes a management section that changes the controllers that process the data on the basis of whether to execute the function processing on the data input to and output from the storage devices.
    Type: Application
    Filed: August 25, 2020
    Publication date: October 28, 2021
    Applicant: Hitachi, Ltd.
    Inventors: Shintaro Ito, Yoshinori Ohira, Masakuni Agetsuma
  • Patent number: 11151045
    Abstract: Provided is a distributed storage system which can reduce a load on a network between storage apparatuses when an access request is received and improve responsiveness. In the distributed storage system, the storage device includes a data area and a cache area; a node becomes an owner node when receiving a transfer of charge of an LU from another node in a non-storage state where LU data is not stored in a data area; the processor of the owner node receives a read request for an LU that is in charge, obtains data of a target area based on data of the storage device of another node when the data of the target area is not stored in the data area or the cache area of the owner node, and transmits the data to a request source and stores it in a cache area.
    Type: Grant
    Filed: September 19, 2019
    Date of Patent: October 19, 2021
    Assignee: HITACHI, LTD.
    Inventors: Yoshinori Ohira, Masakuni Agetsuma, Takeru Chiba, Takahiro Yamamoto, Hiroto Ebara, Hideo Saito
  • Patent number: 11150820
    Abstract: Provided is a storage system and a storage management method, aiming at reducing data movement amount necessary for using an expanded capacity in a distributed RAID. When only A (A is a positive integer) physical storage drives are added, a storage controller selects virtual parcels that are mapped to different physical storage drives among N physical storage drives and are included in different virtual chunks, changes an arrangement of the selected virtual parcels to the added A physical storage drives, and constitutes a new chunk based on unallocated virtual parcels selected from different physical storage drives among the (N+A) physical storage drives.
    Type: Grant
    Filed: September 16, 2020
    Date of Patent: October 19, 2021
    Assignee: HITACHI, LTD.
    Inventors: Hiroki Fujii, Yoshinori Ohira, Takeru Chiba, Yoshiaki Deguchi
  • Publication number: 20210303178
    Abstract: Provided are: one or plural storage units including a plurality of physical storage devices (PDEVs); and a plurality of computers connected to the one or plural storage units via a communication network. Two or more computers execute storage control programs (hereinafter, control programs), respectively. Two or more control programs share a plurality of storage areas provided by the plurality of PDEVs and metadata regarding the plurality of storage areas. When the control program fails, another control program sharing the metadata accesses data stored in a storage area. When a PDEV fails, the control program restores data of the failed PDEV using redundant data stored in another PDEV that has not failed.
    Type: Application
    Filed: September 14, 2020
    Publication date: September 30, 2021
    Applicant: Hitachi, Ltd.
    Inventors: Yoshinori Ohira, Akira Yamamoto, Ryosuke Tatsumi, Takahiro Yamamoto, Masakuni Agetsuma
  • Publication number: 20210294742
    Abstract: In a complex system including; one or more storage systems including a cache and a storage controller; and one or more storage boxes including a storage medium, the storage box generates redundant data from write data received from a server, and writes the write data and the redundant data to the storage medium. The storage box transmits the write data to the storage system when it is difficult to generate the redundant data or it is difficult to write the write data and the redundant data to the storage medium. The storage system stores the received write data in the cache.
    Type: Application
    Filed: September 11, 2020
    Publication date: September 23, 2021
    Inventors: Akira YAMAMOTO, Ryosuke TATSUMI, Yoshinori OHIRA, Junji OGAWA
  • Patent number: 11112973
    Abstract: A computer system includes a host unit that issues a request of an I/O processing to a volume VOL, a local pool control unit that is in charge of management of a local pool based on a storage area of a drive of one node, and a global pool control unit that is in charge of management of a global pool based on a plurality of local pools, wherein the global pool control unit controls transmission of target data of the I/O processing performed by the host unit based on a commonality relationship among a first node that is formed with the host unit performing the I/O processing, a second node that is formed with the global pool control unit, and a third node that is formed with the local pool control unit managing the local pool.
    Type: Grant
    Filed: September 3, 2019
    Date of Patent: September 7, 2021
    Assignee: HITACHI, LTD.
    Inventors: Hiroto Ebara, Yoshinori Ohira, Hideo Saito, Masakuni Agetsuma, Takeru Chiba, Takahiro Yamamoto