Duplicating database contents

Details Duplicating database contents Duplicating database contents

2011-03-29

2011-03-29

Robinson, Greta L (Department: 2169)

Data processing: database and file management or data structures

Database and file access

Preparing data for information retrieval

C707S610000, C707S698000, C707S812000

Reexamination Certificate

active

07917513

ABSTRACT:
The invention provides data processing, data control and information methods and systems for efficiently duplicating contents of a database in the data control system. An example of a data processing system includes: a cache unit acquiring, from a data control system which categorizes a plurality of data elements into a plurality of clusters and stores the plurality of clusters; a group-of-clusters update information acquisition unit for acquiring from the data control system group-of-clusters update information with respect to a group of clusters consisting of two or more clusters; a group-of-clusters update information computation unit for computing group-of-clusters update information with respect to the group of clusters based on two or more pieces of cluster update information; and an update judging unit for judging that a cached data element belonging to the group of clusters is the most updated one.

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