The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 19, 2006
Filed:
Nov. 05, 1999
Itaru Nishizawa, Kodaira, JP;
Shinji Fujiwara, Sagamihara, JP;
Kazutomo Ushijima, Kokubunji, JP;
Shigekazu Inohara, Kokubunji, JP;
Itaru Nishizawa, Kodaira, JP;
Shinji Fujiwara, Sagamihara, JP;
Kazutomo Ushijima, Kokubunji, JP;
Shigekazu Inohara, Kokubunji, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
In order to realize a practical data warehouse system with the use of a network in a distributed environment, for example, data collectors (and) for creating/managing each replica of server data for clients (and) as shown in FIG.are connected to a network (). A data collector holds a data request condition given from a user via a client and negotiates with a server () which supplies data according to such resources as a storage unit, a CPU, etc. usable by the data collector, thereby the range and quality of the data for which a replica is to be created can be adjusted. For query processing, a part or the whole of a query from a client is processed with the use of a replica () created in the data collector. Queries which cannot be processed with any replica in the data collector are transferred to the server. Because a replica created in the data collector can be used to process a query from a client device such a way, the server load can be reduced.