Patent ID: 7171401

Claim:
A data processing system for performing data processing in response to a process request input from an external source, comprising: a main database for receiving and storing data, said data comprising at least part of sub-database data stored in a sub-database of another data processing system, from said another data processing system; a main processor for performing a process based on said process request and said data stored in said main database; a data transceiver for transferring from said data processing system to said another data processing system, in an asynchronous manner, change information in said data stored in said main database resulting from the process performed by said main processor, wherein said data transceiver outputs said change information to said another data processing system in response to a data request provided from said another data processing system; and a communication controller for assigning the process request input from the external source to either said data processing system or said another data processing system based on predetermined time of day criteria.