| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce communication traffic while effectively utilizing the characteristics of communication media concerning data communication between data sharing nodes maintaining and managing copy data. SOLUTION: An application program 301 of a transmission side node inserts a data object 401 to a data store 302, a data synchronizer 303 transmits an update message 403 containing differential data and a history number and a reception side node compares the history number in the received update message 403 with the history number of update history data 402 of the present node and determines whether or not the update message 403 is to be applied.</p> |
