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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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公开(公告)号：US11151045B2
公开(公告)日：2021-10-19
申请号：US16575551
申请日：2019-09-19
Applicant: HITACHI, LTD.
Inventor： Yoshinori Ohira , Masakuni Agetsuma , Takeru Chiba , Takahiro Yamamoto , Hiroto Ebara , Hideo Saito
IPC: G06F12/08 , G06F12/02 , G06F11/14 , G06F3/06 , G06F11/10 , G06F12/0871 , G06F12/0868
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.
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公开(公告)号：US10983720B2
公开(公告)日：2021-04-20
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：US10678470B2
公开(公告)日：2020-06-09
申请号：US16081389
申请日：2016-04-05
Applicant: Hitachi, Ltd.
Inventor： Takeru Chiba , Shintaro Ito , Mitsuo Hayasaka
Abstract: Securing redundancy for physical storage devices that are extended in units smaller than physical storage devices configuring one RAID group. When d+r pieces of physical storage devices are connected by connecting r pieces of physical storage devices, a computer: adds v×r pieces of logical chunks; adds n×v pieces of physical storage areas in each additional storage device; changes mapping information to associate n pieces of physical storage areas with v×(d+r) pieces of logical chunks under a mapping condition; in response to a write request of user data, creates redundant data; determines a first logical chunk corresponding to the write request; and respectively writes n pieces of element data including the user data and the redundant data into n pieces of physical storage areas corresponding to the first logical chunk, based on the mapping information.
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公开(公告)号：US10558383B2
公开(公告)日：2020-02-11
申请号：US15755986
申请日：2015-10-08
Applicant: HITACHI, LTD.
Inventor： Yuki Sakashita , Takeru Chiba , Sadahiro Sugimoto , Tomohiro Kawaguchi
IPC: G06F3/06
Abstract: A storage system includes a plurality of nodes connected with a network and configured to provide volumes, a plurality of drive units; and a management system. Each of the plurality of drive units consists of a plurality of storage drives and is accessible from one or more of the plurality of nodes without intervention of the other nodes. The management system or one of the plurality of nodes is configured to determine number of storage drives to be included in a new distribution range to distribute data of a first volume based on access frequency to the first volume.
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Patent Agency Ranking
公开(公告)号：US09794342B2
公开(公告)日：2017-10-17
申请号：US14770589
申请日：2013-08-20
Applicant: Hitachi, Ltd.
Inventor： Takeru Chiba , Hideo Saito , Tomohiro Kawaguchi
CPC classification number: H04L67/1097 , G06F3/0617 , G06F3/0635 , G06F3/067 , G06F3/0689 , G06F13/14 , H04L7/0008
Abstract: A virtual storage apparatus based on a plurality of storage apparatuses including a first storage apparatus and a second storage apparatus is provided to a host computer. A first logical unit of the first storage apparatus and a second logical unit of the second storage apparatus are provided to the host computer in a form of a virtual logical unit. The first storage apparatus is configured to return a response to an inquiry about port statuses from the host computer designating the virtual logical unit, the response indicating that the status of the first port is a status as indicated by the first port management information and the second storage apparatus is unavailable to respond to the inquiry about port statuses. The second storage apparatus is configured to return no response to the inquiry.
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公开(公告)号：US09304710B2
公开(公告)日：2016-04-05
申请号：US14308032
申请日：2014-06-18
Applicant: Hitachi, Ltd.
Inventor： Takeru Chiba , Sadahiro Sugimoto
CPC classification number: G06F3/0658 , G06F3/0604 , G06F3/0611 , G06F3/065 , G06F3/0659 , G06F3/0683 , G06F3/0689 , G06F12/00 , G06F12/0868 , G06F2003/0697
Abstract: A storage system is described and includes a storage apparatus for storing data used by an external apparatus, first and second temporary data storage units, a host interface, a disk interface, and first and second controllers. The first controller is configured to select as a data transfer process, when the host interface receives a command from the external apparatus, one of a first data transfer process and a second data transfer process based on the command. The first data transfer process is a data transfer from the first temporary data storage unit to the external apparatus by the host interface. The second data transfer process is a data transfer from the first temporary data storage unit to the second temporary data storage unit by the second controller, and a data transfer from the second temporary data storage unit to the external apparatus by the host interface.
Abstract translation: 描述了存储系统，并且包括用于存储由外部设备使用的数据的存储设备，第一和第二临时数据存储单元，主机接口，磁盘接口以及第一和第二控制器。 第一控制器被配置为当主机接口从外部设备接收到命令时，基于该命令选择第一数据传送处理和第二数据传送处理中的一个作为数据传送处理。 第一数据传送处理是通过主机接口从第一临时数据存储单元到外部设备的数据传送。 第二数据传送处理是由第二控制器从第一临时数据存储单元向第二临时数据存储单元的数据传送，以及由主机接口从第二临时数据存储单元向外部设备的数据传送。
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公开(公告)号：US12066894B2
公开(公告)日：2024-08-20
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.
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公开(公告)号：US11544005B2
公开(公告)日：2023-01-03
申请号：US17017944
申请日：2020-09-11
Applicant: Hitachi, Ltd.
Inventor： Takahiro Yamamoto , Hiroto Ebara , Takeru Chiba , Yoshinori Ohira , Masakuni Agetsuma , Mikio Fukuoka
Abstract: In a storage system including a plurality of nodes that provide a storage area and a drive that physically stores data, a parity group is configured with a plurality of data including user data stored in the storage area and redundant data for protecting the user data, a plurality of data in the parity group are stored in a storage area within one predetermined range across a plurality of nodes, and processing for dividing the predetermined range or processing for merging a plurality of predetermined ranges is performed based on a state of the predetermined range.
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公开(公告)号：US11150820B2
公开(公告)日：2021-10-19
申请号：US17022810
申请日：2020-09-16
Applicant: HITACHI, LTD.
Inventor： Hiroki Fujii , Yoshinori Ohira , Takeru Chiba , Yoshiaki Deguchi
IPC: G06F3/06
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.
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