公开(公告)号：US20160034476A1

公开(公告)日：2016-02-04

申请号：US14423762

申请日：2013-10-18

Applicant: HITACHI, LTD.

Inventor： Kazumasa MATSUBARA ,  Mitsuo HAYASAKA ,  Hitoshi KAMEI

IPC: G06F17/30

CPC classification number: G06F16/122 ,  G06F11/00 ,  G06F11/1448 ,  G06F16/13

Abstract: A file management method according to the present invention is based upon a file management method of making a file from a client to a storage device redundant by a certain redundant number and storing the file in the storage device, and the file management method according to the present invention includes a first step of accepting an additional file from the client to the storage device, a second step of comparing capacity of the additional file and unused physical capacity of the storage device and a third step of changing the redundant number of the already stored file, increasing the unused physical capacity and storing the additional file in the storage device when the capacity of the additional file is larger than the unused physical capacity.

Abstract translation: 根据本发明的文件管理方法基于文件管理方法，该文件管理方法将文件从客户端到存储设备冗余，并将该文件存储在存储设备中，并且根据文件管理方法 本发明包括从客户端接收附加文件到存储装置的第一步骤，比较存储装置的附加文件的容量和未使用的物理容量的第二步骤，以及改变已存储的冗余数量的第三步骤 文件，当附加文件的容量大于未使用的物理容量时，增加未使用的物理容量并将附加文件存储在存储设备中。

公开(公告)号：US20150227540A1

公开(公告)日：2015-08-13

申请号：US14178924

申请日：2014-02-12

Applicant: HITACHI, LTD.

Inventor： Wujuan LIN ,  Hirokazu IKEDA ,  Hitoshi KAMEI ,  Takayuki FUKATANI

IPC: G06F17/30

CPC classification number: G06F16/1744 ,  G06F16/221 ,  H03M7/607 ,  H03M7/6088

Abstract: Exemplary embodiments provide a data compression technique which chooses a compression method without compressing data. A storage system comprises a storage media and a controller. The controller is operable to: determine a compression method to be used to compress a data block of uncompressed data based on one or more characteristics of data content of the uncompressed data prior to compressing the data block; and compress the data block of the uncompressed data using the determined compression method. In some embodiments, the controller is operable to determine the compression method based on a compression rule which relates one or more characteristics of data content and compression methods. In specific embodiments, the storage system further comprises a flash memory device which includes the controller to determine the compression method and to compress the data block.

Abstract translation: 示例性实施例提供了在不压缩数据的情况下选择压缩方法的数据压缩技术。 存储系统包括存储介质和控制器。 所述控制器可操作以：在压缩所述数据块之前，基于所述未压缩数据的数据内容的一个或多个特征，确定要用于压缩未压缩数据的数据块的压缩方法; 并使用确定的压缩方法压缩未压缩数据的数据块。 在一些实施例中，控制器可操作以基于涉及数据内容和压缩方法的一个或多个特性的压缩规则来确定压缩方法。 在具体实施例中，存储系统还包括闪速存储器设备，其包括用于确定压缩方法并压缩数据块的控制器。

公开(公告)号：US20150220563A1

公开(公告)日：2015-08-06

申请号：US14617198

申请日：2015-02-09

Applicant: HITACHI, LTD.

Inventor： Hitoshi KAMEI ,  Takaki NAKAMURA

IPC: G06F17/30 ,  G06F3/06

CPC classification number: G06F17/30203 ,  G06F3/061 ,  G06F3/0643 ,  G06F3/065 ,  G06F3/067 ,  G06F17/30088 ,  G06F17/30117 ,  G06F17/30215 ,  G06F17/3023

Abstract: In the prior art clone creating technique of a file, a management table of a snapshot and the file was created when creating the clone file, so that a considerable amount of creation time for creating the clone file and storage capacity was required. In order to solve the problems of the prior art, the present invention provides a system wherein if a request to create a clone of a file is received, a differential file is created while inhibiting update of the file, and update data is written to the differential file. Further, when a first update request is received to the differential file after creating the differential file, a management table is created. According to the invention, a large amount of clone files can be created speedily.

Abstract translation: 在现有技术的克隆创建技术的文件中，在创建克隆文件时创建了快照的管理表和文件，从而需要大量的创建时间来创建克隆文件和存储容量。 为了解决现有技术的问题，本发明提供一种系统，其中如果接收到创建文件的克隆的请求，则在禁止更新文件的同时创建差分文件，并将更新数据写入 差异文件 此外，当在创建差分文件之后向差分文件接收到第一更新请求时，创建管理表。 根据本发明，可以快速创建大量的克隆文件。

公开(公告)号：US20210397485A1

公开(公告)日：2021-12-23

申请号：US17200417

申请日：2021-03-12

Applicant: Hitachi, Ltd.

Inventor： Yuki SAKASHITA ,  Takaki NAKAMURA ,  Hitoshi KAMEI

IPC: G06F9/50 ,  H04L29/08

Abstract: In a distributed storage system, a volume classifier classifies a plurality of volumes into a plurality of groups on the basis of a fluctuation cycle of a load in each volume, a processor (a resource classifier) calculates a total load obtained by summing the loads of the plurality of volumes on the same node within a group at each time and calculates a group load on the basis of a peak of the total load, and the processor of one node (a rebalancer) calculates the group load on a movement destination node in a case where a volume as a movement candidate in rebalancing that moves the volume between nodes is moved from a movement source node to the movement destination node, determines a volume to be moved in the rebalancing and a movement destination volume on the basis of the calculated group load on the movement destination node, and performs the rebalancing.

公开(公告)号：US20180018347A1

公开(公告)日：2018-01-18

申请号：US15543935

申请日：2015-01-30

Applicant: Hitachi, Ltd.

Inventor： Kazuhito YOKOI ,  Go KOJIMA ,  Takuya ODA ,  Yasushi MIYATA ,  Masanori TAKATA ,  Hitoshi KAMEI ,  Akiyoshi TSUCHIYA

IPC: G06F17/30

CPC classification number: G06F16/188 ,  G06F16/13 ,  G06F16/16 ,  G06F16/1827 ,  G06F16/1873

Abstract: The purpose of the present invention is, in a file storage, to shorten an access response time to shared data. When a file storage apparatus receives a command for a specific manipulation of a file system, a specific apparatus determines, based on a state of the file system and a manipulation history, whether or not an unapplied manipulation affects a target of the specific manipulation, the unapplied manipulation being a manipulation which has been previously executed by another file storage apparatus among a plurality of file storage apparatuses and which has not been applied to the file system. When it is determined that the unapplied manipulation affects the target of the specific manipulation, the file storage apparatus applies the unapplied manipulation to the file system, executes the specific manipulation on the file system, and transmits, to a cloud storage apparatus, manipulation information which represents the specific manipulation.

公开(公告)号：US20160011809A1

公开(公告)日：2016-01-14

申请号：US14767066

申请日：2013-11-26

Applicant: HITACHI, LTD.

Inventor： Keiichi MATSUZAWA ,  Hitoshi KAMEI

IPC: G06F3/06 ,  G06F9/455 ,  G06F12/08

CPC classification number: G06F3/0619 ,  G06F3/065 ,  G06F3/0655 ,  G06F3/0665 ,  G06F3/067 ,  G06F3/0689 ,  G06F9/45558 ,  G06F12/0802 ,  G06F12/084 ,  G06F12/0866 ,  G06F2009/45562 ,  G06F2009/4557 ,  G06F2009/45583 ,  G06F2212/224 ,  G06F2212/284 ,  G06F2212/285

Abstract: When computers and virtual machines operating in the computers both attempt to allocate a cache regarding the data in a secondary storage device to respective primary storage devices, identical data is prevented from being stored independently in multiple computers or virtual machines. An integrated cache management function in the computer arbitrates which computer or virtual machine should cache the data of the secondary storage device, and when the computer or the virtual machine executes input/output of data of the secondary storage device, the computer inquires the integrated cache management function, based on which the integrated cache management function retains the cache only in a single computer, and instructs the other computers to delete the cache. Thus, it is possible to prevent identical data from being cached in a duplicated manner in multiple locations of the primary storage device, and enables efficient capacity usage of the primary storage device.

Abstract translation: 当在计算机中操作的计算机和虚拟机都尝试将关于辅助存储设备中的数据的缓存分配给相应的主存储设备时，防止相同的数据被独立地存储在多个计算机或虚拟机中。 计算机中的集成高速缓存管理功能可以对哪个计算机或虚拟机应该缓存二级存储设备的数据进行仲裁，而当计算机或虚拟机执行辅助存储设备的数据输入/输出时，计算机将查询集成高速缓存 管理功能，集成缓存管理功能基于该功能将缓存仅保存在单个计算机中，并指示其他计算机删除高速缓存。 因此，可以防止在主存储设备的多个位置中以重复的方式缓存相同的数据，并且实现主存储设备的高效容量使用。

公开(公告)号：US20150358408A1

公开(公告)日：2015-12-10

申请号：US14759975

申请日：2013-02-19

Applicant: HITACHI, LTD.

Inventor： Takayuki FUKATANI ,  Masanori TAKATA ,  Hitoshi KAMEI

IPC: H04L29/08

CPC classification number: H04L67/1097 ,  G06F11/1448 ,  G06F17/30174 ,  H04L67/104

Abstract: In the present invention, in order to provide an effective synchronization process control method between sites in a multi-site file system sharing through a data center, a synchronization process target file group is split into sub trees of an appropriate size, in accordance with a conflict frequency of an update file between sites, and a throughput between site-data center. Then, the split sub tree is synchronized from the one having high conflict frequency.

Abstract translation: 在本发明中，为了在通过数据中心共享的多站点文件系统中的站点之间提供有效的同步过程控制方法，根据一个同步过程目标文件组将同步过程目标文件组分解成适当大小的子树 站点之间的更新文件的冲突频率以及站点数据中心之间的吞吐量。 然后，分割子树与具有高冲突频率的分组子树同步。

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。