公开(公告)号：US20200333954A1

公开(公告)日：2020-10-22

申请号：US16918632

申请日：2020-07-01

Applicant: HITACHI, LTD.

Inventor： Takeru CHIBA ,  Masakuni AGETSUMA ,  Takahiro YAMAMOTO ,  Hiroto EBARA

IPC: G06F3/06 ,  G06F11/20

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.

公开(公告)号：US20190104195A1

公开(公告)日：2019-04-04

申请号：US16128050

申请日：2018-09-11

Applicant: HITACHI, LTD.

Inventor： Taisuke FUKUYAMA ,  Shuuhei MATSUMOTO ,  Kyosuke ACHIWA ,  Toru MAEDA ,  Hiroto EBARA

IPC: H04L29/08 ,  H04L29/06

Abstract: A computer system comprises a first computer having a first processing performed processing by using a storage region; a second computer having a second processing unit provided the storage region, manage a first port for communication with the first processing unit, and execute a processing request to the storage region; and a third computer having a third processing unit manage a second port for communication with the first processing unit. The third processing unit holds port management information for managing a correspondence relationship of the first port and the second port, selects the first port for redirecting on the basis of the port management information in a case of receiving a connection request; and transmits a response notifying the first port for redirecting to the first processing unit.

公开(公告)号：US20250110842A1

公开(公告)日：2025-04-03

申请号：US18597494

申请日：2024-03-06

Applicant: Hitachi, Ltd.

Inventor： Hiroto EBARA ,  Yoshinori OHIRA ,  Takahiro YAMAMOTO ,  Shintaro ITO ,  Sachie TAJIMA

IPC: G06F11/20

Abstract: A computer system includes a primary site having a primary volume, and having an instance that performs data processing related to input/output data, and a secondary site having a secondary volume, and having an instance. Remote copy is set up between the primary and secondary volumes, and the instance of the primary site transfers data input to or outputted from the primary volume to the secondary site, while the instance of the secondary site stores the transferred data in the secondary volume. The computer system further includes a specifications changing section that changes specifications of the instance of the secondary site when a failover switching process of switching a performer of the data processing from the primary to secondary site is performed, or when a failback switching process of switching the performer of the data processing from the secondary to primary site after the failover switching process is performed.

公开(公告)号：US20230236932A1

公开(公告)日：2023-07-27

申请号：US17940312

申请日：2022-09-08

Applicant: Hitachi, Ltd.

Inventor： Takahiro YAMAMOTO ,  Hideo SAITO ,  Shintaro ITO ,  Sachie TAJIMA ,  Hiroto EBARA ,  Taisuke ONO

IPC: G06F11/10 ,  G06F11/07 ,  G06F11/14

CPC classification number: G06F11/1076 ,  G06F11/0772 ,  G06F11/1469

Abstract: In each node constituting a storage system, there is at least one of a storage area (user area) in which a user data set is stored and a storage area (parity area). For the node having the user area, there is user part difference information including information indicating whether or not to be in presence of difference for each user area of the node. For the node having the parity area, there is parity part difference information including the information indicating whether or not to be in the presence of difference for each parity area of the node. Out of the parity part difference information, the information corresponding to the parity area is the information indicating the presence of difference when there is the information indicating the presence of difference in the storage area of any of the data sets used for generating the parity stored in the parity area.

公开(公告)号：US20220318108A1

公开(公告)日：2022-10-06

申请号：US17469740

申请日：2021-09-08

Applicant: Hitachi, Ltd.

Inventor： Akira YAMAMOTO ,  Hiroto EBARA ,  Yoshinori OHIRA

IPC: G06F11/20 ,  G06F3/06

Abstract: A compound storage system includes a plurality of storage boxes each having a plurality of storage units, and a plurality of real storage systems that process data inputted/outputted to/from the storage units. When a failure occurs at a storage unit 160, the real storage system 100 having the control right executes the recovery process of recovering data stored in a storage area allocated to a logical volume, and the real storage system 100 having the allocation authority executes the recovery process of recovering data stored in a storage area not allocated to the logical volume.

公开(公告)号：US20200019439A1

公开(公告)日：2020-01-16

申请号：US16406177

申请日：2019-05-08

Applicant: Hitachi, Ltd.

Inventor： Tsukasa SHIBAYAMA ,  Hiroto EBARA ,  Akiyoshi TSUCHIYA ,  Tomohiro KAWAGUCHI

IPC: G06F9/50

Abstract: According to one embodiment, a storage system includes a representative node and a plurality of general nodes including a plurality of resources. Each of the general nodes stores resource status information indicating respective statuses of the plurality of resources in a first storage unit thereof. The representative node stores resource status information collected from the plurality of general nodes in a second storage unit thereof, decides whether to acquire the resource status information from the first storage unit of the general node or to acquire the resource status information from the second storage unit based on a received request, and transmits the resource status information acquired from a decided acquisition destination to an issuing source of the request.

公开(公告)号：US20230315301A1

公开(公告)日：2023-10-05

申请号：US18115917

申请日：2023-03-01

Applicant: Hitachi, Ltd.

Inventor： Shintaro ITO ,  Yoshinori OHIRA ,  Hiroto EBARA

IPC: G06F3/06 ,  G06F12/02

CPC classification number: G06F3/0616 ,  G06F3/0679 ,  G06F12/0253 ,  G06F3/0659 ,  G06F2212/7205

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.

公开(公告)号：US20230315286A1

公开(公告)日：2023-10-05

申请号：US17943845

申请日：2022-09-13

Applicant: Hitachi, Ltd.

Inventor： Hiroto EBARA ,  Hideo SAITO ,  Takaki NAKAMURA ,  Misato YOSHIDA ,  Naruki KURATA ,  Takahiro YAMAMOTO

IPC: G06F3/06

CPC classification number: G06F3/0604 ,  G06F3/067 ,  G06F3/0632 ,  G06F3/0664

Abstract: Provided is a processor configured to cause each of a plurality of servers to operate a storage node, configured to combine a plurality of the storage nodes to set a storage cluster, configured to perform a comparison between a maintenance plan for the storage cluster and a state of the storage cluster to modify the maintenance plan based on a result of the comparison, and configured to perform maintenance for the storage cluster in accordance with the maintenance plan modified.

公开(公告)号：US20230259425A1

公开(公告)日：2023-08-17

申请号：US18138179

申请日：2023-04-24

Applicant: Hitachi, Ltd.

Inventor： Takahiro YAMAMOTO ,  Hiroto EBARA ,  Takeru CHIBA ,  Masakuni AGETSUMA

IPC: G06F11/10

CPC classification number: G06F11/1076

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.

公开(公告)号：US20230205650A1

公开(公告)日：2023-06-29

申请号：US17941906

申请日：2022-09-09

Applicant: Hitachi, Ltd.

Inventor： Yoshinori OHIRA ,  Takahiro YAMAMOTO ,  Hiroto EBARA

IPC: G06F11/16

CPC classification number: G06F11/1666 ,  G06F2201/84

Abstract: A storage system includes one or more storage units, and a calculator. Each of the one or more storage units has plural physical storage devices, and a processor. The calculator has a controller that processes data inputted to and outputted from the storage unit by the processor. The storage system subjects the data to redundancy and stores the redundant data, and when a failure in which the data related to a read request cannot be read from one of the physical storage devices has occurred, reads the data from the readable physical storage device, recovers the data related to the read request, and transmits the recovered data to a request source of the read request. A process for recovering the data related to the read request from the read data can be selectively executed by the controller of the calculator and the processor of the storage unit.