专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明专利

JP2004288213A Data processing system and data processing method 审中-公开
公开(公告)号：JP2004288213A
公开(公告)日：2004-10-14
申请号：JP2004149360
申请日：2004-05-19
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： TAKAYAMA HIROSHI , MASAI KAZUO
IPC分类号： G06F17/30 , G06F12/00
摘要： PROBLEM TO BE SOLVED: To improve throughput of searching processing by reducing the frequency of read from an external storage unit, for a database system in which all item search is frequently requested for the same data.
SOLUTION: In a database system of parallel execution type comprising a plurality of processing units, a dictionary administration part, a buffer administration part, and a search execution control part are provided. The buffer administration part, accompanied by reading of a new data block from the external storage unit, transfers the read data block to other processing units. The dictionary administration part administrates recording of the address information for locating the data block once read and transferred to each processing unit. The search execution control part executes and controls search on the data block in each processing unit according to the above address information. Thus, the frequency of reading from the external storage unit is reduced to improve the performance of all item search of the system.
COPYRIGHT: (C)2005,JPO&NCIPI

2. 发明专利

JPH0863479A DATA BASE SYSTEM 失效
公开(公告)号：JPH0863479A
公开(公告)日：1996-03-08
申请号：JP19425294
申请日：1994-08-18
申请人： HITACHI LTD
发明人： TAKAYAMA HIROSHI , MASAI KAZUO
IPC分类号： G06F17/30
摘要： PURPOSE: To improve the throughput of retrieval processing by lowering the frequency of reading from an external storage device as to the data base system where an all-text retrieval request for the same data is made frequently. CONSTITUTION: The parallel execution type data base system consisting of plural processors 102 is provided with a dictionary management part 106, a buffer management part 109, and a retrieval execution control part 104. The buffer management part 109 transfers a data block which is already read in to other processors 102 as a new data block are read in from an external storage device. The dictionary management part 106 records and manages address information indicating the whereabouts of a data block that is read in once and transferred to the respective processors 102. The retrieval execution control part 104 performs execution control over retrieval as to data blocks in the respective processors 102 on the basis of the address information. Consequently, the frequency of reading from the external storage device is lowered to improve the all-text retrieval performance of the system.

3. 发明专利

JPH086829A SIMULTANEOUS FULL DATA RETRIEVING METHOD FOR DATA BASE 失效
公开(公告)号：JPH086829A
公开(公告)日：1996-01-12
申请号：JP13546494
申请日：1994-06-17
申请人： HITACHI LTD
发明人： TAKAYAMA HIROSHI , MIYAZAKI MITSUO , MASAI KAZUO , YAMASHITA KUNIAKI
IPC分类号： G06F12/00 , G06F17/30
摘要： PURPOSE:To efficiently perform full data retrieval by waiting a retrieval processing for plural following full data retrieval requests until full data retrieval in execution ends, and starting their execution at the same time after the full data retrieval processing ends. CONSTITUTION:A retrieval request analysis part 104 analyzes a user's retrieval request inputted from a retrieval request input part 101 and determines a retrieving method for the data base. A request holding control part 107 decides whether or not a table decided as a current object of retrieval at a current new retrieval request is currently in full data retrieval processing and places the request in a wait state when the table is in full data retrieval at another request. After the precedent full data retrieval processing ends, the held retrieval request is started at the same time. A synchronous retrieval control part 108 decides whether or not the table decided as the current object of retrieval is currently in full data retrieval processing in response to a user's retrieval request inputted from the input part 101, sets a current access page in retrieval start position information when so, and starts the full data retrieval processing from the halfway page.

4. 发明专利

JPS63211043A SECRET PROTECTION SYSTEM FOR INTEGRATED SYSTEM 失效
公开(公告)号：JPS63211043A
公开(公告)日：1988-09-01
申请号：JP4257787
申请日：1987-02-27
申请人： HITACHI LTD
发明人： TAKAYAMA HIROSHI
IPC分类号： G06F12/14 , G06F21/22 , G06F21/24
摘要： PURPOSE:To avoid the degradation in performance due to concentration of the management load and to flexible constitute subsystems by managing secret protection management information distributed in subsystems and an integrated management system. CONSTITUTION:Check related to secret protection of resources peculiar to subsystems 3 and 4 and update of information which manages secret protection are performed by subsystems 3 and 4, and secret protection management information related to resources shared between subsystems 3 and 4 is managed by an integrated management system 1 or a secret protection management system 2 which is not included in this system 1. The integrated management system 1 uses security protection management information update means 5 and 6 for respective subsystems to request that matching of secret protection management information to subsystems 3 and 4 is kept, and secret protection management information is changed by decision of subsystems 3 and 4.

5. 发明专利

JPS61141035A Data retrieval system 失效
标题翻译：数据检索系统
公开(公告)号：JPS61141035A
公开(公告)日：1986-06-28
申请号：JP26275684
申请日：1984-12-14
申请人： Hitachi Ltd
发明人： GOSHO HIROYUKI , TAKAYAMA HIROSHI
IPC分类号： G06F7/24
摘要： PURPOSE: To process a sort request in descending and ascending orders at a high speed by installing a pointer capable of pointing data in right and left directions between nodes of the same depth on an index of a tree structure.
CONSTITUTION: The titled system is of an index model having a tree structure, and formed with a route page 1, an index page 2, leaf pages 3W5 and data 7 and 8 of one line on a table, which include a key value. In order to attain the retrieval in descending and ascending orders by such an index, the pointer capable of pointing in both directions is given between nodes on pages having the same depth. Owing to the installation of the pointer, data can be obtained by specifying one index key value, and the result sorted in the ascending or descending order can be obtained with the use of the index having the tree structure.
COPYRIGHT: (C)1986,JPO&Japio
摘要翻译：目的：通过安装指向树结构索引上相同深度的节点之间的左右方向的数据的指针，以高速递减顺序处理排序请求。标准：标题系统是具有树结构的索引模型，并且形成有一个路由页面1，索引页2，叶子页3-5以及表上的一行的数据7和8，其中包括一个键值。为了通过这样的索引以递减顺序获得检索，能够在具有相同深度的页面上的节点之间给出能够指向两个方向的指针。由于指针的安装，可以通过指定一个索引键值来获得数据，并且可以使用具有树结构的索引获得按升序或降序排序的结果。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式