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公开(公告)号：US20210303178A1
公开(公告)日：2021-09-30
申请号：US17019471
申请日：2020-09-14
Applicant: Hitachi, Ltd.
Inventor： Yoshinori Ohira , Akira Yamamoto , Ryosuke Tatsumi , Takahiro Yamamoto , Masakuni Agetsuma
IPC: G06F3/06
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.
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公开(公告)号：US11089097B2
公开(公告)日：2021-08-10
申请号：US15920501
申请日：2018-03-14
Applicant: HITACHI, LTD.
Inventor： Kaiho Fukuchi , Jun Nemoto , Masakuni Agetsuma
Abstract: The time required for recovery in a distributed computing system can be reduced. At least one node (for example a server) or a different computer (for example a management server) are provided in the distributed computing system which includes a plurality of nodes existing at a plurality of sites. One or more sites at which one or more nodes that hold one or more datasets identical to one or more datasets held by a node to be recovered are identified. For the recovery, it is determined, on the basis of the one or more identified sites, a restore destination site that is a site of a node to which the one or more identical datasets are to be restored from among the plurality of sites.
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公开(公告)号：US11068367B2
公开(公告)日：2021-07-20
申请号：US16569964
申请日：2019-09-13
Applicant: HITACHI, LTD.
Inventor： Hideo Saito , Yoshinori Ohira , Masakuni Agetsuma , Hiroto Ebara
Abstract: While an extra storage resource required for an operation of IaaS/PaaS is reduced, an SLA on storage performance is maintained even upon a failure. In a storage system including a plurality of storage nodes for providing storage regions for storing data of a computer on which an application is executed, a normal mode to be set in a normal state and an emergency mode in which a predetermined function is suppressed compared with the normal mode are prepared as a process mode for a request for input and output of data. In the storage system, in response to the occurrence of a failure in a first storage node, the process mode is switched to the emergency mode for a second storage node in which the failure does not occur.
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公开(公告)号：US10990468B2
公开(公告)日：2021-04-27
申请号：US16067825
申请日：2016-03-14
Applicant: HITACHI, LTD.
Inventor： Akihiko Araki , Masakuni Agetsuma , Sachie Tajima , Takanobu Suzuki , Masanori Takada
Abstract: A computing system that can maintain reliability required of a storage program while causing the storage program to operate on an operating system (OS) is provided. A processor of the computing system executes an OS controlling a hardware device and a storage program operating on the OS and using the hardware device via the OS. The OS identifies an error status of the hardware device when receiving a notification of an error that has occurred to the hardware device, and notifies the storage program that operates on the OS of the error status when the error status satisfies a predetermined condition. The storage program determines error handling on the hardware device on the basis of the error status, and requests the OS to perform the determined error handling. The OS performs the determined error handling on the hardware device.
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公开(公告)号：US10740040B2
公开(公告)日：2020-08-11
申请号：US15772098
申请日：2016-01-22
Applicant: Hitachi, Ltd.
Inventor： Takanobu Suzuki , Masakuni Agetsuma , Hiroaki Akutsu , Sachie Tajima
IPC: G06F12/08 , G06F3/06 , G06F13/10 , G06F12/0866 , G06F12/0871
Abstract: The computer system executes a storage program that operates on an OS to provide a logical volume to a host. The computer system includes volume management information including information on a storage function to be applied to the logical volume provided by the storage program. Upon receiving an I/O request for the logical volume from the host, the OS determines whether it is necessary for the storage program to perform an I/O process on the basis of the information on the storage function to be applied to the logical volume by referring to the volume management information. When it is determined that the I/O process is necessary, the OS communicates with the storage program and the storage program executes the I/O process. When it is determined that it is not necessary for the storage program to perform the I/O process, the OS outputs an I/O response to the host.
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Patent Agency Ranking
公开(公告)号：US10705737B2
公开(公告)日：2020-07-07
申请号：US16563522
申请日：2019-09-06
Applicant: HITACHI, LTD.
Inventor： Takeru Chiba , Masakuni Agetsuma , Takahiro Yamamoto , Hiroto Ebara
Abstract: An object is to construct a storage system configured 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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公开(公告)号：US20200174672A1
公开(公告)日：2020-06-04
申请号：US16568543
申请日：2019-09-12
Applicant: Hitachi, Ltd.
Inventor： Masakuni Agetsuma , Takahiro Yamamoto , Hideo Saito , Takaki Nakamura , Takeru Chiba , Hiroto Ebara
Abstract: A storage system is configured to include a plurality of storage nodes, and includes a selection unit which selects a storage node required for setting a data protection level after conversion from among the plurality of storage nodes on the basis of information related to the conversion of the data protection level. The storage node selected by the selection unit manages data using the data protection level after conversion.
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公开(公告)号：US09940042B2
公开(公告)日：2018-04-10
申请号：US14900791
申请日：2013-09-06
Applicant: HITACHI, LTD.
Inventor： Masakuni Agetsuma
CPC classification number: G06F3/0619 , G06F3/06 , G06F3/0611 , G06F3/065 , G06F3/067 , G06F11/14 , G06F11/2094
Abstract: Each of a plurality of storage systems in a distributed storage system is provided with: a strong-consistency-control processor which controls data synchronization that ensures consistency of duplicated data; a weak-consistency-control processor which controls data synchronization that does not necessarily ensure consistency of the duplicated data; an access-switching processor which determines a redundancy number corresponding to the number of storage systems having duplicated data stored thereon, selects in accordance with the characteristics of the duplicated data and the position of a terminal issuing the I/O request, storage systems of a number corresponding to the redundancy number, and selectively determines, as the control for the data synchronization, one from among the strong-consistency-control processor, the weak-consistency-control processor, and consistency control unnecessary; and an I/O processor which executes, on the basis of the determined control for the data synchronization, the I/O request for the duplicated data in the selected storage systems.
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39.发明授权公开(公告)号：US09009287B2
公开(公告)日：2015-04-14
申请号：US13951517
申请日：2013-07-26
Applicant: Hitachi, Ltd.
Inventor： Masakuni Agetsuma , Takahiro Nakano
CPC classification number: H04L67/1097 , G06F3/0622 , G06F3/0635 , G06F3/0664 , G06F3/067 , H04L29/06 , H04L41/024 , H04L41/0803 , H04L43/00 , H04L61/1582
Abstract: The storage system in the present invention includes: plural control units for controlling data sending/reception independently for each network; a management unit provided between a management computer and the control units, for managing the control units based on a command sent from the management computer; a virtual communication channel creation unit for creating a virtual communication channel between the management unit and the control units; a virtual communication channel connection unit for separately connecting the management unit and each control unit to the virtual communication channel created by the virtual communication channel creation unit; and a sending unit for sending, to each control unit, a command sent from the management computer via the virtual communication channel connected by the virtual communication channel connection unit.
Abstract translation: 本发明的存储系统包括：多个控制单元，用于独立地控制每个网络的数据发送/接收; 管理单元，设置在管理计算机和控制单元之间，用于基于从管理计算机发送的命令来管理控制单元; 虚拟通信信道创建单元，用于在所述管理单元和所述控制单元之间创建虚拟通信信道; 虚拟通信信道连接单元，用于将管理单元和每个控制单元分别连接到由虚拟通信信道创建单元创建的虚拟通信信道; 以及发送单元，用于经由由虚拟通信信道连接单元连接的虚拟通信信道向各控制单元发送从管理计算机发送的命令。
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公开(公告)号：US11836378B2
公开(公告)日：2023-12-05
申请号：US17692764
申请日：2022-03-11
Applicant: Hitachi, Ltd.
Inventor： Takaki Nakamura , Takahiro Yamamoto , Shintaro Ito , Masakuni Agetsuma
IPC: G06F3/06
CPC classification number: G06F3/0656 , G06F3/0604 , G06F3/0676 , G06F3/0679
Abstract: To set an appropriate buffer area in a storage system that performs hierarchical storage management. The storage system includes a storage device that provides a storage pool and a storage management unit that manages the storage pool in a tiered manner. The storage pool is provided with a first tier, a second tier, a third tier, and a third tier buffer which is a buffer area used as a buffer when reading or writing data from or to the third tier which is a buffer target tier. The storage management unit determines a size of the third tier buffer based on an access frequency of the third tier.
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