US 2006/0143213 A1 · Duplicating database contents

A data processing system for acquiring a data element from a data control system and performing data processing on the data element, the data control system categorizing a plurality of data elements into a plurality of clusters and storing the plurality of clusters, comprising:

a cache unit for acquiring from the data control system a data element belonging to a single cluster of the plurality of clusters, and cluster update information of which a data value is changed when any data element belonging to the single cluster is updated, and for caching the data element and the cluster update information thus acquired;
a group-of-clusters update information acquisition unit for acquiring, from the data control system, group-of-clusters update information which is computed by the data control system based on two or more pieces of the cluster update information stored in the data control system with respect to two or more of the clusters containing two or more of the data elements having been cached, the group-of-clusters update information pertaining to a group of clusters consisting of the two or more clusters;
a group-of-clusters update information computation unit for computing the group-of-clusters update information with respect to the group of clusters based on the two or more pieces of cluster update information having been cached;
and
an update judging unit for judging that an aforementioned data element thus cached belonging to an aforementioned cluster of the group of clusters is the most updated one in a condition where the group-of-clusters update information which is computed by the group-of-clusters update information computation unit coincides with the group-of-clusters update information which is acquired from the data control system.

2 more elements

A data processing system for acquiring a data element from a data control system and performing a data processing on the data element, the data control system categorizing a plurality of data elements into a plurality of clusters and storing the plurality of clusters, comprising:

a cache unit for acquiring from the data control system a data element belonging to a single cluster of the plurality of clusters, and cluster update information of which data value is changed when any data element belonging to the single cluster is updated, and for caching the data element and the cluster update information thus acquired;
a group-of-clusters update information computation unit for computing group-of-clusters update information pertaining to a group of clusters based on two or more pieces of the cluster update information acquired with respect to two or more of the clusters containing two or more of the data elements having been cached, the group of clusters consisting of the two or more clusters;
an update inquiry unit for transmitting to the data control system the group-of-clusters update information which is computed by the group-of-clusters update information computation unit, and for inquiring whether or not the group-of-clusters update information thus transmitted coincides with the group-of-clusters update information which is set based on two or more of the cluster update information stored in the data control system with respect to the two or more clusters;
and
an update judging unit for judging that an aforementioned data element thus cached belonging to an aforementioned cluster of the group of clusters is the most updated one, in a condition where a response is received that the group-of-clusters update information which is computed by the group-of-clusters update information computation unit coincides with the group-of-clusters update information which is based on the cluster update information stored in the data control system.

2 more elements

A data control system comprising:

a data storage unit for categorizing a plurality of data elements into a plurality of clusters and storing the plurality of clusters;
a cluster update information storage unit for storing cluster update information indicative of an update state of a data element of each of the plurality of clusters in such a way that the cluster update information is associated with the each of the plurality of clusters;
a cluster update information change unit for changing, to a different one, a data value in the cluster update information for the cluster to which the data element belongs, provided that the data element has been updated;
a data transmission unit for transmitting to a data processing system the data element and the cluster update information for the cluster to which the data element belongs in response to a request from the data processing system for acquiring the data element and performing a data processing on the data element;
a group-of-clusters update information receiving unit for receiving group-of-clusters update information which is computed by the data processing system based on the cluster update information with respect to a group of clusters consisting of two or more of the clusters, the cluster update information belonging to the group of clusters;
a group-of-clusters update information computation unit for computing the group-of-clusters update information based on the cluster update information stored in the cluster update information storage unit with respect to the two or more clusters;
and
an update informing unit for informing the data processing system that an aforementioned data element in an aforementioned cluster belonging to the group of clusters is the most updated one, the data element having been cached in the data processing system, in a condition where the group-of-clusters update information which is computed by the group-of-clusters update information computation unit coincides with the group-of-clusters update information which is transmitted from the data processing system.

5 more elements

An information system, comprising:

a data control system for categorizing a plurality of data elements into a plurality of clusters and storing the plurality of clusters;
and
a data processing system for acquiring data from the data control system and performing a data processing on the data,
wherein the data control system comprises:
a data storage unit for categorizing a plurality of aforementioned data elements into a plurality of aforementioned clusters and storing the plurality of clusters;
a cluster update information storage unit for storing cluster update information indicative of an update state of a data element of each of the plurality of clusters in such a way that the cluster update information is associated with the each of the plurality of clusters;
a cluster update information change unit for changing, to a different one, a data value in the cluster update information for the cluster to which the data element belongs, provided that the data element has been updated;
a data transmission unit for transmitting to the data processing system the data element and the cluster update information for the cluster to which the data element belongs in response to a request from the data processing system;
a first group-of-clusters update information computation unit for, in a condition where from the data processing system a referential request for the cluster update information with respect to a group of clusters consisting of two or more of the clusters is received, computing group-of-clusters update information based on the cluster update information for the two or more clusters belonging to the group of clusters;
and
an update information transmission unit for transmitting the group-of-clusters update information to the data processing system;
and
the data processing system comprises:
a cache unit for acquiring from the data control system a data element belonging to a single cluster of the plurality of clusters, and the cluster update information for the single cluster, and for caching the data element and the cluster update information thus acquired;
a group-of-clusters update information acquisition unit for transmitting to the data control system the referential request with respect to a group of clusters consisting of two or more of the clusters containing two or more of the data elements having been cached, and for acquiring from the data control system group-of-clusters update information pertaining to the group of clusters;
a second group-of-clusters update information computation unit for computing the group-of-clusters update information with respect to the group of clusters based on two or more pieces of the cluster update information having been cached;
and
an update judging means for judging that an aforementioned data element, having been cached, belonging to an aforementioned cluster of the group of clusters, is the most updated one, in a condition where the group-of-clusters update information computed by the second group-of-clusters update information computation unit coincides with the group-of-clusters update information acquired from the data control system.

15 more elements

An information system, comprising:

a data control system for categorizing a plurality of data elements into a plurality of clusters and storing the plurality of clusters;
and
a data processing system for acquiring data from the data control system and performing a data processing on the data,
wherein the data control system comprises:
a data storage unit for categorizing a plurality of data elements into a plurality of clusters and storing the plurality of clusters;
a cluster update information storage unit for storing cluster update information indicative of an update state of a data element of each of the plurality of clusters in such a way that the cluster update information is associated with the each of the plurality of clusters;
a cluster update information change unit for changing, to a different one, a data value in the cluster update information for the cluster to which the data element belongs, provided that the data element has been updated;
a data transmission unit for transmitting to the data processing system the data element and the cluster update information for the cluster to which the data element belongs in response to a request from the data processing system;
a group-of-clusters update information receiving unit for receiving group-of-clusters update information which is computed by the data processing system based on the cluster update information with respect to a group of clusters consisting of two or more of the clusters, the cluster update information belonging to the group of clusters;
a first group-of-clusters update information computation unit for computing the group-of-clusters update information based on the cluster update information stored in the cluster update information storage unit with respect to the two or more clusters;
and
an update informing unit for informing the data processing system that an aforementioned data element in an aforementioned cluster belonging to the group of clusters is the most updated one, the data element having been cached in the data processing system, in a condition where the group-of-clusters update information which is computed by the first group-of-clusters update information computation unit coincides with the group-of-clusters update information which is transmitted from the data processing system;
and
the data processing system comprises:
a cache unit for acquiring from the data control system a data element belonging to a single cluster of the plurality of clusters, and the cluster update information for the single cluster, and for caching the data element and the cluster update information thus acquired;
a second group-of-clusters update information computation unit for computing group-of-clusters update information with respect to a group of clusters based on two or more pieces of the cluster update information acquired pertaining to two or more of the clusters containing two or more of the data elements having been cached, the group of clusters consisting of the two or more clusters;
an update inquiry unit for transmitting to the data control system the group-of-clusters update information which is computed by the second group-of-clusters update information computation unit, and for inquiring whether or not the group-of-clusters update information thus transmitted coincides with the group-of-clusters update information which is set based on two or more of the cluster update information stored in the data control system with respect to the two or more clusters;
and
an update judging unit for judging that an aforementioned data element thus cached belonging to an aforementioned cluster of the group of the clusters is the most updated one, in a condition where a response is received that the group-of-clusters update information which is computed by the second group-of-clusters update information computation unit coincides with the group-of-clusters update information which is based on the cluster update information stored in the data control system.

16 more elements

A data processing method on a data processing system for acquiring a data element from a data control system and performing a data processing on the data element, the data control system categorizing a plurality of data elements into a plurality of clusters and storing the plurality of clusters, the data processing method comprising:

acquiring from the data control system a data element belonging to a single cluster of the plurality of clusters and cluster update information of which data value is changed when any data element belonging to the single cluster is updated, and caching the data element and the cluster update information thus acquired;
acquiring a group-of-clusters update information from the data control system, the group-of-clusters update information which is computed by the data control system based on two or more pieces of the cluster update information stored in the data control system with respect to two or more of the clusters containing two or more of the data elements having been cached, and the group-of-clusters update information pertaining to a group of clusters consisting of the two or more clusters;
computing a group-of-clusters update information with respect to the group of clusters based on the two or more pieces of cluster update information having been cached;
and
judging that an aforementioned data element thus cached belonging to an aforementioned cluster of the group of clusters is the most updated one, in a condition where the group-of-clusters update information which is computed in the group-of-clusters update information computation step coincides with the group-of-clusters update information which is acquired from the data control system.

2 more elements

A data processing program for a data processing system which acquires a data element from a data control system and performs a data processing on the data element, the data control system categorizing a plurality of data elements into a plurality of clusters and storing the plurality of clusters, the data processing program causing the data processing system to function as:

a cache unit for acquiring from the data control system a data element belonging to a single cluster of the plurality of clusters, and cluster update information of which data value is changed when any data element belonging to the single cluster is updated, and for caching the data element and the cluster update information thus acquired;
a group-of-clusters update information computation unit for computing group-of-clusters update information pertaining to a group of clusters based on two or more pieces of the cluster update information acquired with respect to two or more of the clusters containing two or more of the data elements having been cached, the group of clusters consisting of the two or more clusters;
an update inquiry unit for transmitting to the data control system the group-of-clusters update information which is computed by the group-of-clusters update information computation unit, and for inquiring whether or not the group-of-clusters update information thus transmitted coincides with the group-of-clusters update information which is set based on two or more of the cluster update information stored in the data control system with respect to the two or more clusters;
and
an update judging unit for judging that an aforementioned data element thus cached belonging to an aforementioned cluster of the group of clusters is the most updated one, in a condition where a response is received that the group-of-clusters update information which is computed by the group-of-clusters update information computation unit coincides with the group-of-clusters update information which is based on the cluster update information stored in the data control system.

2 more elements

A data control program for a data control system which categorizes a plurality of data elements into a plurality of clusters and stores the plurality of clusters, the data control program causing the data control system to function as:

a data storage unit for categorizing a plurality of data elements into a plurality of clusters and storing the plurality of clusters;
a cluster update information storage unit for storing cluster update information indicative of an update state of a data element of each of the plurality of clusters in such a way that the cluster update information is associated with the each of the plurality of clusters;
a cluster update information change unit for changing, to a different one, a data value in the cluster update information for the cluster to which the data element belongs, provided that the data element has been updated;
a data transmission unit for transmitting to a data processing system the data element and the cluster update information for the cluster to which the data element belongs in response to a request from the data processing system for acquiring the data element and performing a data processing on the data element;
a group-of-clusters update information receiving unit for receiving group-of-clusters update information which is computed by the data processing system based on the cluster update information with respect to a group of clusters consisting of two or more of the clusters, the cluster update information belonging to the group of clusters;
a group-of-clusters update information computation unit for computing the group-of-clusters update information based on the cluster update information stored in the cluster update information storage unit with respect to the two or more clusters;
and
an update informing unit for informing the data processing system that an aforementioned data element in an aforementioned cluster belonging to the group of clusters is the most updated one, the data element having been cached in the data processing system, in a condition where the group-of-clusters update information which is computed by the group-of-clusters update information computation unit coincides with the group-of-clusters update information which is transmitted from the data processing system.

5 more elements

Duplicating database contents

Life of this patent

Duplicating database contents

Life of this patent

Abstract

Claims26