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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.
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公开(公告)号：US20220365850A1
公开(公告)日：2022-11-17
申请号：US17690290
申请日：2022-03-09
Applicant: Hitachi, Ltd.
Inventor： Takeru CHIBA , Hiroki FUJII
Abstract: It is made possible to pursue both higher speeds of rebuilds in the distributed RAID scheme and high availability due to acquisition of DE-failure tolerance. A virtual chunk includes k (k is an integer that is equal to or larger than two) virtual parcels including a virtual parcel having user data and a virtual parcel having element data that is redundant data for repairing the user data, the virtual parcels included in the same virtual chunk is stored by mapping the virtual parcels in storage areas of k mutually different physical storage drives among N (k
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公开(公告)号：US20200125258A1
公开(公告)日：2020-04-23
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：US20200034263A1
公开(公告)日：2020-01-30
申请号：US16492051
申请日：2017-09-06
Applicant: Hitachi, Ltd.
Inventor： Hiroto EBARA , Mitsuo HAYASAKA , Takeru CHIBA
Abstract: A distributed storage system, which receives a write request from a client, includes a plurality of computers which receive power supply from a plurality of power supply units. A first computer, among the plurality of computers, which is a computer that receives the write request from the client, is configured to: cache updated data which is at least apart of data accompanying the write request; select n second computers which are n computers (n is a natural number) among computers each receiving power from a power supply unit different from a power supply unit of the first computer as transfer destinations of the updated data; and transfer the updated data to the selected n second computers, respectively. At least one of the n second computers, when caching the updated data from the first computer, is configured to return a result to the first computer.
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公开(公告)号：US20220027239A1
公开(公告)日：2022-01-27
申请号：US17497092
申请日：2021-10-08
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：US20190235792A1
公开(公告)日：2019-08-01
申请号：US16377372
申请日：2019-04-08
Applicant: Hitachi, Ltd.
Inventor： Shintaro ITO , Yuko MATSUI , Masakuni AGETSUMA , Hideo SAITO , Takeru CHIBA , Takahiro YAMAMOTO
IPC: G06F3/06
CPC classification number: G06F3/0659 , G06F3/0619 , G06F3/0631 , G06F3/064 , G06F3/0644 , G06F3/067 , G06F3/0683 , G06F11/16
Abstract: A capacity control module which manages a physical storage area provided by each of storage devices in a cluster by dividing the physical storage area into a physical storage area having a predetermined size, in a plurality of storage nodes configuring a storage system, and, a storage control module which receives an I/O request from a higher-level device are provided, two storage control modules, which are arranged in different storage nodes and configure a redundancy configuration, are managed as a storage control module pair, the capacity control module preferentially allocates each of the physical storage areas in the vicinity of an arrangement destination of each of the storage control modules configuring the storage control module pair, to the storage control module pair, and storage data is read from or is written on the physical storage area, according to a command applied from the storage control module.
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公开(公告)号：US20190163395A1
公开(公告)日：2019-05-30
申请号：US15910085
申请日：2018-03-02
Applicant: Hitachi, Ltd.
Inventor： Shintaro ITO , Yuko MATSUI , Masakuni AGETSUMA , Hideo SAITO , Takeru CHIBA , Takahiro YAMAMOTO
IPC: G06F3/06
Abstract: A capacity control module which manages a physical storage area provided by each of storage devices in a cluster by dividing the physical storage area into a physical storage area having a predetermined size, in a plurality of storage nodes configuring a storage system, and, a storage control module which receives an I/O request from a higher-level device are provided, two storage control modules, which are arranged in different storage nodes and configure a redundancy configuration, are managed as a storage control module pair, the capacity control module preferentially allocates each of the physical storage areas in the vicinity of an arrangement destination of each of the storage control modules configuring the storage control module pair, to the storage control module pair, and storage data is read from or is written on the physical storage area, according to a command applied from the storage control module.
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公开(公告)号：US20180246668A1
公开(公告)日：2018-08-30
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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公开(公告)号：US20180081757A1
公开(公告)日：2018-03-22
申请号：US15554291
申请日：2015-03-06
Applicant: HITACHI, LTD.
Inventor： Takeru CHIBA , Hiroaki AKUTSU
CPC classification number: G06F11/1076 , G06F3/0619 , G06F3/0665 , G06F3/0689
Abstract: A virtual parity group including virtual storage drives is formed. A redundant data set is stored in a virtual stripe array including virtual stripes that are virtual storage regions of a prescribed size of the respective virtual storage drives constituting the virtual parity group. The virtual stripes of the virtual stripe array are mapped to different physical storage drives, respectively. Virtual chunks including one or more virtual stripe arrays formed in the virtual parity group. Physical parity groups including the physical storage drives are formed. The virtual stripes of the virtual chunks in a distributed manner are mapped to the physical parity groups. One or more virtual chunks are selected from among the virtual chunks. Storage regions corresponding to the selected one or more virtual chunks are converted to spare regions in the physical storage region.
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公开(公告)号：US20220283938A1
公开(公告)日：2022-09-08
申请号：US17471968
申请日：2021-09-10
Applicant: Hitachi, Ltd.
Inventor： Hiroki FUJII , Yoshinori OHIRA , Takeru CHIBA , Akira DEGUCHI
Abstract: Element data stored in a selected virtual device is moved to another virtual device, a virtual parcel allocated to a specific physical device is allocated to a plurality of unallocated areas located in different physical devices, which are mapped to the virtual parcel in which the data is unstored by moving the element data, and all the specific physical devices are brought into an unallocated state.
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