Data processing: database and file management or data structures – Database design – Data structure types
Reexamination Certificate
2006-09-19
2006-09-19
Wassum, Luke S (Department: 2167)
Data processing: database and file management or data structures
Database design
Data structure types
C707S793000
Reexamination Certificate
active
07111019
ABSTRACT:
In order to realize a practical data warehouse system with the use of a network in a distributed environment, for example, data collectors (101and102) for creating/managing each replica of server data for clients (103and104) as shown in FIG.1are connected to a network (113). A data collector holds a data request condition given from a user via a client and negotiates with a server (114, 122) 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 (123) 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.
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Fujiwara Shinji
Inohara Shigekazu
Nishizawa Itaru
Ushijima Kazutomo
Hitachi , Ltd.
Mattingly ,Stanger ,Malur & Brundidge, P.C.
Wassum Luke S
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