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公开(公告)号：US11960771B2
公开(公告)日：2024-04-16
申请号：US17900968
申请日：2022-09-01
Applicant: Hitachi, Ltd.
Inventor： Shugo Ogawa , Ryosuke Tatsumi , Yoshinori Ohira , Hiroto Ebara , Junji Ogawa
CPC classification number: G06F3/0659 , G06F3/0604 , G06F3/0647 , G06F3/0673
Abstract: A first controller manages first mapping information for accessing data stored in a storage area, management of which is assigned to the first controller, and second mapping information for accessing data stored in a predetermined storage area, management of which is assigned to a second controller. The second controller, when having executed garbage collection on the predetermined storage area, changes mapping information to post-migration mapping information for accessing data after being migrated by the garbage collection. The first controller acquires the post-migration mapping information from the second controller, and updates the second mapping information using the post-migration mapping information when information in the second mapping information and is to be used for accessing the data in the predetermined storage area has been updated accompanying the garbage collection when the first controller accesses the data in the predetermined storage area after the garbage collection by using the second mapping information.
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公开(公告)号：US11861205B2
公开(公告)日：2024-01-02
申请号：US17691918
申请日：2022-03-10
Applicant: HITACHI, LTD.
Inventor： Yoshinori Oohira , Shugo Ogawa , Ryosuke Tatsumi , Hiroto Ebara , Takahiro Yamamoto
IPC: G06F3/06
CPC classification number: G06F3/065 , G06F3/061 , G06F3/064 , G06F3/0631 , G06F3/0637 , G06F3/0644 , G06F3/0665 , G06F3/0688
Abstract: A volume to which a storage function is applied is migrated without copying data written to a volume as a migration object between computers while maintaining functionality of the storage function. A plurality of computers are accessibly connected to each of one or more physical storage devices. Each computer migrates ownership of the volume as the migration object to a computer as a destination. When the migration object volume from a first computer to a second computer is an owner volume to which a storage function is applied, the storage function requiring control data for I/O of data, the control data being metadata other than domain mapping data (indicating a relationship between a volume region and a storage region and being metadata for the owner volume), in place of or in addition to the domain mapping data.
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公开(公告)号：US11550488B2
公开(公告)日：2023-01-10
申请号：US17187071
申请日：2021-02-26
Applicant: Hitachi, Ltd.
Inventor： Hiroto Ebara , Yoshinori Ohira , Takaki Nakamura , Masakuni Agetsuma
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.
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公开(公告)号：US20220107747A1
公开(公告)日：2022-04-07
申请号：US17187071
申请日：2021-02-26
Applicant: Hitachi, Ltd.
Inventor： Hiroto Ebara , Yoshinori Ohira , Takaki Nakamura , Masakuni Agetsuma
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.
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公开(公告)号：US11169879B2
公开(公告)日：2021-11-09
申请号：US16553360
申请日：2019-08-28
Applicant: Hitachi, Ltd.
Inventor： Takahiro Yamamoto , Hiroto Ebara , Takeru Chiba , Masakuni Agetsuma
IPC: G06F11/10
Abstract: Provided is a storage system that performs inter-node movement of parity and reconfiguration of a stripe when a node configuration is changed. The storage system includes a plurality of nodes and a management unit, in which the nodes are targets for data write and read requests, form a stripe by a plurality of data stored in different nodes and parity generated based on the plurality of data, and store the parity of the stripe to which the data under the write request belongs in a node different from the plurality of nodes that store the plurality of data so as to perform redundancy; and the management unit transmits, to the node, an arrangement change request to perform the inter-node movement of the parity and the reconfiguration of the stripe when the node configuration is changed.
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Patent Agency Ranking
公开(公告)号：US11112973B2
公开(公告)日：2021-09-07
申请号：US16558460
申请日：2019-09-03
Applicant: Hitachi, Ltd.
Inventor： Hiroto Ebara , Yoshinori Ohira , Hideo Saito , Masakuni Agetsuma , Takeru Chiba , Takahiro Yamamoto
IPC: G06F3/06
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.
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公开(公告)号：US11675545B2
公开(公告)日：2023-06-13
申请号：US17474562
申请日：2021-09-14
Applicant: Hitachi, Ltd.
Inventor： Shugo Ogawa , Akira Yamamoto , Yoshinori Ohira , Ryosuke Tatsumi , Junji Ogawa , Hiroto Ebara
CPC classification number: G06F3/067 , G06F3/0604 , G06F3/0647 , G06F3/0655
Abstract: One or a plurality of physical storage devices that provide a physical storage area are connected to first and second computers. The computer updates metadata indicating the address correspondence relationship between the logical address of the volume and the physical address of the physical storage area in the write processing performed based on a write request designating the volume. The first computer copies the metadata to the second computer while receiving the write request. When the address correspondence relationship indicated by the copied metadata portion is changed during copying of the metadata, the first computer updates the metadata portion and copies the metadata portion to the second computer.
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公开(公告)号：US11630734B2
公开(公告)日：2023-04-18
申请号：US17474395
申请日：2021-09-14
Applicant: Hitachi, Ltd.
Inventor： Hiroto Ebara , Akira Yamamoto , Yoshinori Ohira , Takahiro Yamamoto , Masakuni Agetsuma , Tatsuya Hirai
Abstract: A scale-out storage system includes a plurality of computer nodes each of which has a memory and a processor, and a storage apparatus. The computer nodes have one or more redundancy groups each of which is a group for metadata protection. Each of the one or more redundancy groups includes two or more of the computer nodes including a primary node being a primary computer node and a secondary node being a secondary computer node, and a failover is performed from the primary node to the secondary node. The memory of the primary node has stored therein metadata related to the redundancy group and to be accessed for control. The metadata is redundantly stored in the memory of the primary node and the memory of the secondary node.
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9.发明授权公开(公告)号：US11609698B1
公开(公告)日：2023-03-21
申请号：US17939112
申请日：2022-09-07
Applicant: Hitachi, Ltd.
Inventor： Shintaro Ito , Yoshinori Ohira , Hiroto Ebara
Abstract: A storage system having high performance and high reliability includes a non-volatile storage device, a storage controller configured to control data to be read and written from and to the storage device using a storage function; and a volatile memory. In the reading and writing, the storage controller generates a log and stores the log in a log memory, writes the log stored in the memory to the storage device, and collects a capacity of the storage area of the memory storing the log written to the storage device. In collecting a free area of the memory, the storage controller executes a base image saving method of writing in the storage device in units of storage areas having a plurality of logs and collecting a free area, and a garbage collection method of writing in the storage device in units of logs and collecting a free area.
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公开(公告)号：US11301137B2
公开(公告)日：2022-04-12
申请号：US16918632
申请日：2020-07-01
Applicant: HITACHI, LTD.
Inventor： Takeru Chiba , Masakuni Agetsuma , Takahiro Yamamoto , Hiroto Ebara
Abstract: An object is to construct a storage system with a configuration with a high degree of freedom while ensuring a certain fault tolerance. The storage system includes a plurality of nodes that process an I/O processing request of data. The node has a storage device and a processor that performs the I/O processing on the storage device. The processor constitutes a data redundancy configuration in which data stored in different storage devices is combined as a data set. A management unit for managing the storage system performs a fault tolerance calculation of calculating fault tolerance information for a failure of each component by using component information that is information of a component including at least the and the storage device, and by using data redundancy configuration information related to the data redundancy configuration, and determines a data arrangement by applying the data redundancy configuration related to the calculated fault tolerance information.
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