公开(公告)号：US20230090897A1

公开(公告)日：2023-03-23

申请号：US17682511

申请日：2022-02-28

Applicant: Hitachi, Ltd.

Inventor： Shigenori MATSUMOTO ,  Hiromitsu NAKAGAWA ,  Kunihiko HARADA ,  Tsuyoshi TANAKA

IPC: G06F16/901 ,  G06F16/903 ,  G06F16/9038

Abstract: A data analysis requirement definition aid apparatus includes a processor configured to execute a program; and a storage device configured to store a plurality of nodes that each include a character string, and an edge indicating a relationship between two nodes among the plurality of nodes, and wherein the processor configures to receive input of a to-be-analyzed node; retrieve, from among the plurality of nodes, a similar node including a character string similar to the character string of the to-be-analyzed node; acquire a directed graph structure constituted of a group of nodes including the similar node, and an edge between two nodes among the group of nodes; search for a path including the similar node from the directed graph structure; and output, in a displayable manner, the directed graph structure so as to display a path in a different format.

公开(公告)号：US20160203180A1

公开(公告)日：2016-07-14

申请号：US14911137

申请日：2014-10-29

Applicant: HITACHI, LTD.

Inventor： Tomohiro HANAI ,  Kazutomo USHIJIMA ,  Tsuyoshi TANAKA ,  Hideo AOKI ,  Atsushi TOMODA

IPC: G06F17/30 ,  G06F9/355 ,  G06F9/30

Abstract: An index tree search method, by a computer, for searching an index tree included in a database provided by the computer which includes processors executing a plurality of threads and a memory, the index tree search method comprising: a first step of allocating, by the computer, search ranges in the index tree to the plurality of threads; a second step of receiving, by the computer, a search key; a third step of selecting, by the computer, a thread corresponding to the received search key; and a fourth step of searching, by the computer, the index tree with the selected thread using the received search key.

Abstract translation: 一种索引树搜索方法，由计算机搜索包括在由包括处理器执行多个线程和存储器的计算机提供的数据库中的索引树，所述索引树搜索方法包括：第一步骤，通过 计算机，索引树中的搜索范围到多个线程; 计算机接收搜索关键字的第二步骤; 计算机选择对应于所接收的搜索关键字的线程的第三步骤; 以及第四步骤，使用所接收的搜索关键字，利用计算机搜索具有所选线程的索引树。

公开(公告)号：US20210397745A1

公开(公告)日：2021-12-23

申请号：US17196048

申请日：2021-03-09

Applicant: Hitachi, Ltd.

Inventor： Yohsuke ISHII ,  Tsuyoshi TANAKA ,  Kazuhiko MIZUNO

IPC: G06F21/62 ,  G06F16/28 ,  G06F16/2457 ,  G06F16/22

Abstract: When anonymized data is used for data analysis purposes, it is required to try a plurality of anonymized data by trial and error. In this case, it is required to prevent re-identification (deterioration in an anonymity level) caused by collation of the plurality of anonymized data regardless of the intention of a worker.
Information on a use condition of use target data (an anonymization method and an importance level of each attribute) is acquired from a data user, a processing data candidate is generated based upon the acquired information, and when a collation result formed of a plurality of any pieces of a processing data candidate group (data obtained by processing a value of each attribute to a lower limit value of a generalized hierarchy definition level and combining the data with each other) satisfies the use condition, a processing data group is provided as a processing data providable group.

公开(公告)号：US20200301585A1

公开(公告)日：2020-09-24

申请号：US16566278

申请日：2019-09-10

Applicant: HITACHI, LTD.

Inventor： Kazuhiko MIZUNO ,  Tsuyoshi TANAKA ,  Yohsuke ISHII

IPC: G06F3/06 ,  G06F16/11

Abstract: Provided is a data management system capable of properly managing data to undergo masking processing in the secondary use of data. This data storage management system is equipped with a storage unit which stores masked data of real data at a first point in time, and a data control unit which extracts data of a storage area that has not been masked from update data based on first information representing a masked storage area in the masked data and second information representing a masked storage area in the masked data of update data, which is data obtained by updating the real data from the first point in time to a second point in time, extracts data of the masked storage area, from which the same masked data has been removed, from the masked data of the update data, and generates the extracted data as difference data.

公开(公告)号：US20180217875A1

公开(公告)日：2018-08-02

申请号：US15747785

申请日：2016-02-17

Applicant: Hitachi, Ltd.

Inventor： Tadashi TAKEUCHI ,  Hideo AOKI ,  Tsuyoshi TANAKA ,  Yuuya ISODA

IPC: G06F9/50 ,  G06F9/48

CPC classification number: G06F9/5088 ,  G06F9/4856 ,  G06F2209/501

Abstract: A data processing system in which application nodes capable of executing a program are provided at sites at a plurality of locations, and storage nodes for storing data are also provided at the plurality of locations, with these locations being coupled to one another via a network, wherein: a first application node stores a program I/O history; a second application node reproduces I/O events on the basis of the I/O history, thereby estimating data processing performance; and the first application node determines, on the basis of the data processing performance estimation, whether or not to transfer the program to the second application node.

公开(公告)号：US20170039110A1

公开(公告)日：2017-02-09

申请号：US15303293

申请日：2014-04-23

Applicant: Hitachi, Ltd.

Inventor： Tsuyoshi TANAKA ,  Yuuya ISODA ,  Atsushi TOMODA ,  Tomohiro HANAI ,  Hideo AOKI

IPC: G06F11/14 ,  G06F12/0875 ,  G06F17/30 ,  G06F3/06

CPC classification number: G06F11/1458 ,  G06F3/061 ,  G06F3/0656 ,  G06F3/0685 ,  G06F12/0875 ,  G06F16/215 ,  G06F16/2308 ,  G06F16/2379 ,  G06F2212/60

Abstract: A computer for executing processing through use of a database, the computer comprising: a processor including a cache memory; and a non-volatile memory coupled to the processor, the non-volatile memory having the database constructed thereon. The computer comprises: a database management module configured to execute processing on the database; and a write processing module configured to write data stored in the cache memory into the database. The write processing module writes data that is operated in the transaction processing into the database among data stored in the cache memory, in a case of receiving a commit request for transaction processing that uses the database.

Abstract translation: 一种用于通过使用数据库执行处理的计算机，所述计算机包括：包括高速缓存存储器的处理器; 以及耦合到所述处理器的非易失性存储器，所述非易失性存储器具有在其上构造的数据库。 所述计算机包括：数据库管理模块，被配置为对所述数据库执行处理; 以及写处理模块，被配置为将存储在所述高速缓冲存储器中的数据写入所述数据库。 在接收到使用数据库的事务处理的提交请求的情况下，写处理模块将在事务处理中操作的数据写入存储在高速缓冲存储器中的数据中。