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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：US10579433B2
公开(公告)日：2020-03-03
申请号：US16406177
申请日：2019-05-08
Applicant: Hitachi, Ltd.
Inventor： Tsukasa Shibayama , Hiroto Ebara , Akiyoshi Tsuchiya , Tomohiro Kawaguchi
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.
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14.发明授权公开(公告)号：US12169632B2
公开(公告)日：2024-12-17
申请号：US18115917
申请日：2023-03-01
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：US11704426B1
公开(公告)日：2023-07-18
申请号：US17692375
申请日：2022-03-11
Applicant: Hitachi, Ltd.
Inventor： Takaki Nakamura , Takahiro Yamamoto , Hideo Saito , Keisuke Matsumoto , Hiroto Ebara , Naruki Kurata
IPC: G06F21/62
CPC classification number: G06F21/6218
Abstract: An object of the invention is to appropriately separate an available cluster for each user in a storage system configured by using a plurality of clusters each of which is an aggregate of nodes. A computer system includes a plurality of K8s clusters each configured by one or a plurality of K8s nodes, a storage that provides a volume, and a tenant management unit that manages the plurality of the K8s clusters and the storage. The tenant management unit creates, in the storage, a plurality of tenants respectively corresponding to the plurality of the K8s clusters. The storage, for each of the plurality of the K8s clusters, permits access from the K8s cluster to a tenant corresponding to the K8s cluster and prohibits access from the K8s cluster to a tenant not corresponding to the K8s cluster.
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Patent Agency Ranking
公开(公告)号：US20220334726A1
公开(公告)日：2022-10-20
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
IPC: G06F3/06
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：US11467907B2
公开(公告)日：2022-10-11
申请号：US17018322
申请日：2020-09-11
Applicant: Hitachi, Ltd.
Inventor： Takahiro Yamamoto , Akira Yamamoto , Masakuni Agetsuma , Yoshinori Ohira , Hiroto Ebara
Abstract: This invention provides a storage system enabling it to properly rebuild a storage device involved in failure. In the storage system, a controller repairs data for which an access request has been issued, returns a reply to the source of the access request, and stores the repaired data. As regards data for which access is not requested, the controller executes rebuilding of storage regions corresponding to rebuild management units in priority-based order and changes priority for executing the rebuilding, based on access frequencies for a first period and access frequencies for a second period that is shorter than the first period.
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公开(公告)号：US20220100547A1
公开(公告)日：2022-03-31
申请号：US17186850
申请日：2021-02-26
Applicant: Hitachi, Ltd.
Inventor： Akira Yamamoto , Hiroto Ebara , Takaki Nakamura , Yoshinori Ohira
Abstract: A compound storage system including: a storage box having a plurality of storage devices; and a plurality of servers capable of executing one or more virtual machines. The storage box stores a logical volume. The virtual machines executable by the server include an application VM and a controller VM. When a predetermined situation occurs in which an application VM of a migration source server is migrated to a predetermined migration destination server, at least one processor of the one or more servers in the compound storage system migrates the application VM to the migration destination server, and migrates a control right of a logical volume used by the application VM to a controller VM of the migration destination server.
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公开(公告)号：US20210247934A1
公开(公告)日：2021-08-12
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
IPC: G06F3/06
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：US20210200639A1
公开(公告)日：2021-07-01
申请号：US17018322
申请日：2020-09-11
Applicant: Hitachi, Ltd.
Inventor： Takahiro Yamamoto , Akira Yamamoto , Masakuni Agetsuma , Yoshinori Ohira , Hiroto Ebara
Abstract: This invention provides a storage system enabling it to properly rebuild a storage device involved in failure. In the storage system, a controller repairs data for which an access request has been issued, returns a reply to the source of the access request, and stores the repaired data. As regards data for which access is not requested, the controller executes rebuilding of storage regions corresponding to rebuild management units in priority-based order and changes priority for executing the rebuilding, based on access frequencies for a first period and access frequencies for a second period that is shorter than the first period.
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