公开(公告)号：US20190235755A1

公开(公告)日：2019-08-01

申请号：US16123738

申请日：2018-09-06

Applicant: HITACHI, LTD.

Inventor： Takahiro ABE ,  Ran OGATA ,  Atsushi SUTOH ,  Kensuke NARITA

IPC: G06F3/06 ,  G06F12/02

Abstract: A storage apparatus and method of controlling same which, while preventing depletion of a storage area due to the generation of garbage, also prevent a drop in response performance from the perspective of the host, are proposed. One or more storage devices which constitute a pool, and a controller which manages a log-structured write space which is a virtual logical space, compresses data of a compression target among the data which has been written to the virtual volume by the host and logs the data in the log-structured write space, and writes the post-compression data which has been logged in the log-structured write space to the storage device, are provided in a storage apparatus, the controller restricting reception of a write request from the host when a used capacity of the pool is at or above a threshold; when the data logged in the log-structured write space has been updated, the controller determines whether a predetermined condition is satisfied and, when the predetermined condition is satisfied, the controller overwrites the compressed data of the pre-update data which has been logged in the log-structured write space with the compressed data of the post-update data.

公开(公告)号：US20150356134A1

公开(公告)日：2015-12-10

申请号：US14760721

申请日：2013-05-13

Applicant: HITACHI, LTD.

Inventor： Mitsuo HAYASAKA ,  Hitoshi KAMEI ,  Atsushi SUTOH

IPC: G06F17/30

CPC classification number: G06F17/30371 ,  G06F3/0608 ,  G06F3/0641 ,  G06F3/067 ,  G06F17/30097 ,  G06F17/30159 ,  G06F17/3033 ,  G06F17/30342

Abstract: Chunk de-duplication performance is improved. A de-duplication system has a cut-out processing unit which inputs a content from a client terminal thereinto, determines a calculation range from a predetermined maximum chunk size and a predetermined minimum chunk size, divides the calculation range into at least two small calculation ranges, sets the positions of windows for rolling hash calculation so that the rolling hash calculation is continuous between the two small calculation ranges, and subjects the at least two small calculation ranges to the rolling hash calculation with shifting of the windows based on parallel processing to cut out a chunk from the content, and a de-duplication processing unit which does not store the cut-out chunk into a storage device when the chunk having the same contents as those of the cut-out chunk is already stored in the storage device.

Abstract translation: 块重复删除性能得到提高。 重复数据删除系统具有从客户终端输入内容的切出处理单元，从预定的最大块大小和预定的最小块大小确定计算范围，将计算范围划分为至少两个小的计算范围 ，设置用于滚动哈希计算的窗口的位置，使得滚动哈希计算在两个小的计算范围之间是连续的，并且基于平行处理切换窗口来移动至少两个小的计算范围到滚动哈希计算 从该内容中取出一个块，以及一个重复数据删除处理单元，当具有与切出的块相同内容的块已经存储在存储设备中时，该存储设备中不存储切出的块。

公开(公告)号：US20240354773A1

公开(公告)日：2024-10-24

申请号：US18591159

申请日：2024-02-29

Applicant: Hitachi, Ltd.

Inventor： Naoshi NISHI ,  Atsushi SUTOH

IPC: G06Q30/018

CPC classification number: G06Q30/018

Abstract: An environmental load reducing system is disclosed to enable a user desiring to contribute to reduction of environmental loads to examine a switch to a configuration reducing environmental loads. The environmental load reducing system compares configuration information associated with an operating system operated by a user with configuration information associated with a different operating system of a different user, to detect a difference between system components of these systems. The system also compares a calculation result of a carbon dioxide emission amount emitted by operation of the operating system for a fixed period of time with a calculation result of a carbon dioxide emission amount emitted by operation of the different operating system for the fixed period of time. A presentation unit presents the different system component as a low environmental load component according to the system component difference and in reference to a comparison result.

公开(公告)号：US20140250157A1

公开(公告)日：2014-09-04

申请号：US14275018

申请日：2014-05-12

Applicant: HITACHI, LTD.

Inventor： Atsushi SUTOH ,  Masanori TAKATA ,  Hitoshi KAMEI ,  Nobumitsu TAKAOKA ,  Takahiro NAKANO ,  Akio SHIMADA

IPC: G06F17/30

CPC classification number: G06F17/3012 ,  G06F17/30079 ,  G06F17/30082 ,  G06F17/30221

Abstract: Time required for a file server to determine files to be migrated from a first storage region to a second storage region is reduced. A file service system coupled to the storage system for providing a first storage region and a second storage region stores identifiers of files that have been accessed by a client, in accessed file identifier information and determines the files to be migrated from the first storage region to the second storage region based on metadata of the files stored in the first storage region and the accessed file identifier information.

Abstract translation: 减少文件服务器确定要从第一存储区域迁移到第二存储区域的文件所需的时间。 耦合到存储系统的用于提供第一存储区域和第二存储区域的文件服务系统存储由客户端访问的文件的标识符，并将其从第一存储区域迁移到 基于存储在第一存储区域中的文件的元数据和所访问的文件标识符信息的第二存储区域。

公开(公告)号：US20170286447A1

公开(公告)日：2017-10-05

申请号：US15507684

申请日：2014-10-30

Applicant: Hitachi, Ltd.

Inventor： Hieuhanh LE ,  Masanori TAKATA ,  Yoji NAKATANI ,  Hitoshi ARAI ,  Hitoshi KAMEI ,  Akiyoshi TSUCHIYA ,  Atsushi SUTOH

IPC: G06F17/30

CPC classification number: G06F16/1774 ,  G06F16/122 ,  G06F16/182

Abstract: A computer system for sharing objects comprises multiple front-end nodes and a back-end node for providing a namespace shared by the front-end nodes. A first front-end node that is any one of the front-end nodes manages local-lock counts for each of objects managed by the first front-end node. The local-lock count is the number of locks taken by operations to the objects including the directory and sub-objects thereof. Every time receiving a request for processing a target object from a client, the front-end node requests the back-end node to lock a parent directory of the target object if the parent directory has not been locked by the back-end node. The front-end node sends a response of the received request to the client regardless of whether or not the parent directory has been unlocked by the back-end node. If the local-lock count of the parent directory is zero, the first front-end node requests the back-end node to unlock the parent directory.

公开(公告)号：US20140358859A1

公开(公告)日：2014-12-04

申请号：US14464115

申请日：2014-08-20

Applicant: Hitachi, Ltd.

Inventor： Jun NEMOTO ,  Yohsuke ISHII ,  Atsushi SUTOH

IPC: G06F17/30

CPC classification number: G06F17/30174 ,  G06F17/30041 ,  G06F17/301 ,  G06F17/30132 ,  G06F17/30153 ,  G06F17/30168

Abstract: In a computer system according to an embodiment of the present invention, a first slave server includes copy management information associating a master file system identifier with an identifier of a slave server including a copy of the master file system identified by the master file system identifier. The first slave server acquires a copy of a part of a master file system. The copy includes a stub-state object (file or directory). The first slave server searches the copy management information for a slave server to be queried regarding information for materializing the stub-state object. If the slave server to be queried includes the information for materialization, the first slave server materializes the stub-state object using the information for materialization acquired from the queried slave server.

Abstract translation: 在根据本发明的实施例的计算机系统中，第一从服务器包括将主文件系统标识符与从服务器的标识符相关联的复制管理信息，包括由主文件系统标识符标识的主文件系统的副本。 第一个从服务器获取主文件系统的一部分的副本。 副本包括一个存根状态对象（文件或目录）。 第一个从属服务器搜索复制管理信息以查找关于实现存根状态对象的信息的待检查的从服务器。 如果要查询的从属服务器包含实现信息，则第一个从服务器将使用从查询的从属服务器获取的实现信息实现存根状态对象。

公开(公告)号：US20130318318A1

公开(公告)日：2013-11-28

申请号：US13956413

申请日：2013-08-01

Applicant: HITACHI, LTD.

Inventor： Jun NEMOTO ,  Atsushi SUTOH ,  Takaki NAKAMURA ,  Yoji NAKATANI

IPC: G06F3/06

CPC classification number: G06F3/065 ,  G06F3/0614 ,  G06F3/0683 ,  G06F11/1451 ,  G06F2201/84

Abstract: Difference information between two snapshots from a first point-in-time snapshot, which has been copied, to an N.sup.th point-in-time snapshot, which constitutes the latest point-in-time snapshot, is acquired to a memory module. The memory module stores two or more pieces of difference information. The two or more pieces of difference information comprise difference information that shows the difference between a first point-in-time snapshot and any snapshot other than the first point-in-time snapshot of N snapshots. Copy difference information, which is information that shows the difference between the first point-in-time snapshot and a specified snapshot from among N snapshots, and which is used in copying the specified snapshot, is created on the basis of the two or more pieces of difference information.

Abstract translation: 从已经被复制的第一时间点快照到构成最新时间点快照的N.supthth时间点快照的两个快照之间的差异信息被获取到存储器 模块。 存储器模块存储两个或更多个差异信息。 两条或更多条差异信息包括差异信息，其显示第一时间点快照与N个快照的第一时间点快照之外的任何快照之间的差异。 复制差异信息，它是显示N个快照中第一个时间点快照和指定快照之间的区别的信息，以及复制指定快照时使用的差异信息，是基于两个或多个部分 的差异信息。