Data processing equipment, data management apparatus, data processing method, data management method, data processing programs, data management program and information system,

摘要

PPROBLEM TO BE SOLVED: To enable a data processing apparatus that uses data on a database by replication to efficiently detect an update on the database. PSOLUTION: The data processing apparatus comprises a cache part for acquiring and caching a single cluster of data elements and cluster update information about the single cluster from a data management apparatus for storing a plurality of data elements by classification into a plurality of clusters, a cluster group update information acquisition part for acquiring cluster group update information about a cluster group of two or more clusters from the data management apparatus, a cluster group update information calculation part for calculating cluster group update information about the cluster group from two or more pieces of cluster update information, and an update determination part for, if the calculated cluster group update information matches the cluster group update information acquired from the data management apparatus, determining that the cached data elements in the cluster group is the latest. PCOPYRIGHT: (C)2006,JPO&NCIPI