公开(公告)号：US11543989B2

公开(公告)日：2023-01-03

申请号：US17208129

申请日：2021-03-22

Applicant: Hitachi, Ltd.

Inventor： Kazuki Matsugami ,  Tomohiro Kawaguchi ,  Akira Yamamoto

IPC: G06F12/02 ,  G06F3/06

Abstract: In a case of exchanging a migration source storage controller and a migration destination storage controller sharing one storage medium during replacement of storage devices, when hardware configurations or data management forms of the storage controllers are different, data in the storage medium cannot be shared even when data management information can be copied. Accordingly, a storage system, having a storage control unit and a storage drive provided with a storage medium, includes data management information for accessing data in the storage drive. A first storage control unit copies data management information about the data in the storage drive to a second storage control unit. When a write request is received from a host after copying of the data management information begins, each of the first storage and second storage control units stores write data related to the write request in a separate storage area of the storage drive.

公开(公告)号：US11201788B2

公开(公告)日：2021-12-14

申请号：US17015336

申请日：2020-09-09

Applicant: Hitachi, Ltd.

Inventor： Ryosuke Tatsumi ,  Akira Yamamoto ,  Shugo Ogawa ,  Yoshinori Ohira ,  Koji Hosogi

IPC: G06F15/173 ,  H04L12/24 ,  H04L29/08

Abstract: In a distributed computing system, a bottleneck for performance of a network is avoided and a high-performance scalable resource management function is achieved. The distributed computing system includes a plurality of components connected to each other via a network. Each of the components includes a plurality of compute nodes, a plurality of drive casings, and a plurality of storage devices. The network includes a plurality of network switches and is configured in layers. When a storage region is to be allocated to a compute node among the compute nodes, a managing unit selects, from the storage devices, a storage device related to the storage region to be allocated or selects, from the drives, a drive casing related to the storage region to be allocated, based on a network distance between two of the compute node, the storage device, and the drive casing.

公开(公告)号：US11003368B2

公开(公告)日：2021-05-11

申请号：US16814545

申请日：2020-03-10

Applicant: Hitachi, Ltd.

Inventor： Akira Yamamoto ,  Miho Imazaki

IPC: G06F3/06

Abstract: One or more storage systems are connected to one or more storage boxes comprising multiple storage devices. Multiple storage areas provided by one or more storage boxes include an allocated area, which is a storage area that is allocated to a virtual volume, and an empty area, which is a storage area that is not allocated to any logical volume. Multiple owner rights corresponding to multiple storage areas are set in one or more storage systems. A storage system having an empty area owner right changes an empty area to the allocated area by allocating the empty area. In a case where a configuration change (a relative change in the number of storage boxes with respect to the number of storage systems) is performed, a first storage system that exists after the configuration change sets, in the first storage system, either more or fewer owner rights than the owner rights, which have been allocated to the first storage system before the configuration change.

公开(公告)号：US10747440B2

公开(公告)日：2020-08-18

申请号：US15121785

申请日：2014-09-24

Applicant: Hitachi, Ltd.

Inventor： Kazuei Hironaka ,  Akira Yamamoto ,  Yoshihiro Yoshii ,  Mitsuo Hayasaka

IPC: G06F12/02 ,  G06F3/06

Abstract: It is provided a storage system comprising at least one controller and a storage device. The at least one controller verifies, for each predetermined storage area within a logical volume provided to the host computer, whether data of the each predetermined storage area is duplicated to another storage area. The storage device holds unshared data associated only with the storage area and shared data associated with the storage area and the another storage area in the case where the data of the each predetermined storage area is identical to the data of the another storage area. The at least one controller reads the unshared data in the case where a request to read the data is received under a state in which the unshared data and the shared data are held, and releases an area in which the unshared data is stored at predetermined timing.

公开(公告)号：US10572171B2

公开(公告)日：2020-02-25

申请号：US15769424

申请日：2016-02-29

Applicant: Hitachi, Ltd.

Inventor： Nobumitsu Takaoka ,  Akira Yamamoto ,  Tomohiro Kawaguchi ,  Yasuo Watanabe ,  Yoshihiro Yoshii ,  Kazuki Matsugami

IPC: G06F3/06

Abstract: A storage system according to an aspect of the present invention includes one or more storage devices for storing write data to which a write request from a host computer is directed, and a storage controller that provides one or more volumes to the host computer. Further, the storage system manages the time when a write request is last received from the host computer for each partition within the volume. Then, the storage controller performs a deduplication process upon detecting the partition not receiving a write request for a predetermined time or more from the time when the write request is last received.

公开(公告)号：US10452292B2

公开(公告)日：2019-10-22

申请号：US15039983

申请日：2014-03-07

Applicant: HITACHI, LTD.

Inventor： Naoko Ikegaya ,  Nobuhiro Maki ,  Akira Yamamoto

IPC: G06F3/06

Abstract: In a scale-out type storage in which multiple physical storage systems are provided collectively as a single virtual storage system, a logical path is established between the host computer and the virtual storage system so that input/output performance of the storage is not deteriorated, wherein during allocation of a volume to the virtual storage system, if a logical control unit (logical CU) establishing a logical path to a volume is unallocated, a logical CU and a volume is generated to a storage system having either a small number of allocated logical CUs or a small amount of used storage capacity. On the other hand, if there is a storage system having a logical CU already allocated thereto, a volume is generated in that storage system.

公开(公告)号：US10067882B2

公开(公告)日：2018-09-04

申请号：US15540681

申请日：2015-01-13

Applicant: Hitachi, Ltd.

Inventor： Miho Imazaki ,  Akira Yamamoto ,  Yusuke Nonaka ,  Tomohiro Yoshihara ,  Shunji Kawamura

IPC: G06F11/10 ,  G06F12/109

Abstract: A storage system manages correspondence relationships between physical addresses and logical addresses inside a storage device, as well as logical spaces provided by a plurality of storage devices, and when a determination is made as to whether first data and second data are stored in the same storage device in a case in which the first data and the second data are exchanged inside a logical space, and the determination is found to be affirmative, the storage device replaces the logical address corresponding to the first data with the logical address corresponding to the second data without changing the physical address of the physical area in which the first data is stored and the physical address of the physical area in which the second data is stored.

公开(公告)号：US09916248B2

公开(公告)日：2018-03-13

申请号：US14770567

申请日：2013-12-12

Applicant: Hitachi, Ltd.

Inventor： Sadahiro Sugimoto ,  Akira Yamamoto ,  Kazuei Hironaka

IPC: G06F12/0864 ,  G06F3/06 ,  G06F12/16 ,  G06F11/10 ,  G06F12/0804 ,  G06F12/0868 ,  G06F12/0871

CPC classification number: G06F12/0864 ,  G06F3/06 ,  G06F11/1096 ,  G06F12/0804 ,  G06F12/0868 ,  G06F12/0871 ,  G06F12/16 ,  G06F2212/1032 ,  G06F2212/1044 ,  G06F2212/262 ,  G06F2212/283 ,  G06F2212/312 ,  G06F2212/401

Abstract: The storage device of the present invention provides a decompression VOL having no corresponding relationship (mapping) with a final storage media to a superior device, and receives accesses from the superior device to the decompression VOL. Then, data written into the decompression VOL is compressed on-line in a cache memory, and the compressed data is mapped to a compression VOL which is a volume mapped to a final storage media. At the same time, by maintaining and managing a mapping information between an area in the decompression VOL where data has been written and a location in the compression VOL to which compressed data of the relevant data is mapped, when a read request is received from a superior device regarding the decompression VOL, the storage device converts a location information in the decompression VOL designated by the read request to a location information of the final storage media.

公开(公告)号：US09250809B2

公开(公告)日：2016-02-02

申请号：US13978023

申请日：2013-03-18

Applicant: Hitachi, Ltd.

Inventor： Akira Yamamoto ,  Miho Imazaki

IPC: G06F3/00 ,  G06F3/06

CPC classification number: G06F3/0631 ,  G06F3/0604 ,  G06F3/0607 ,  G06F3/0608 ,  G06F3/0629 ,  G06F3/0647 ,  G06F3/0659 ,  G06F3/0665 ,  G06F3/067 ,  G06F3/0689

Abstract: One or more storage systems are connected to one or more storage boxes comprising multiple storage devices. Multiple storage areas provided by one or more storage boxes include an allocated area, which is a storage area that is allocated to a virtual volume, and an empty area, which is a storage area that is not allocated to any logical volume. Multiple owner rights corresponding to multiple storage areas are set in one or more storage systems. A storage system having an empty area owner right changes an empty area to the allocated area by allocating the empty area. In a case where a configuration change (a relative change in the number of storage boxes with respect to the number of storage systems) is performed, a first storage system that exists after the configuration change sets, in the first storage system, either more or fewer owner rights than the owner rights, which have been allocated to the first storage system before the configuration change.

Abstract translation: 一个或多个存储系统连接到包括多个存储设备的一个或多个存储盒。 由一个或多个存储盒提供的多个存储区域包括作为分配给虚拟卷的存储区域的分配区域和作为未分配给任何逻辑卷的存储区域的空白区域。 在一个或多个存储系统中设置与多个存储区域相对应的多个所有者权限。 具有空区域所有者权限的存储系统通过分配空白区域将空白区域改变为所分配的区域。 在执行配置改变（相对于存储系统的数量的存储盒的数量的相对变化）的情况下，在配置改变之后存在的第一存储系统在第一存储系统中设置更多或 在配置更改之前已经分配给第一个存储系统的所有者权限较所有者权限更少。

公开(公告)号：US09183217B2

公开(公告)日：2015-11-10

申请号：US13643815

申请日：2012-10-18

Applicant: Hitachi, Ltd.

Inventor： Akihiko Araki ,  Akira Yamamoto ,  Kenta Shiga

IPC: G06F17/30 ,  G06F3/06

CPC classification number: G06F17/30153 ,  G06F3/0608 ,  G06F3/064 ,  G06F3/0685

Abstract: The present invention aims at improving the performance of a compression function in a storage system, and solves the prior art problem of having to decompress a whole compression unit even if a read request or a write request targets only a portion smaller than the compression unit, causing increase of overhead of decompression processing and elongation of processing time, and deteriorating performance. The present invention prevents unnecessary decompression processing and reduces the overhead of processing by suppressing the range of decompression processing to a minimum portion according to the relationship between the read/write request range and the compression unit.

Abstract translation: 本发明旨在提高存储系统中的压缩功能的性能，并且即使读请求或写请求仅针对小于压缩单元的部分，也解决了必须对整个压缩单元进行解压缩的现有技术问题， 导致减压处理的开销增加和处理时间延长，性能下降。 本发明根据读/写请求范围和压缩单元之间的关系，防止不必要的解压缩处理，并且通过将减压处理的范围抑制到最小部分来减少处理开销。