Patent ID: 6757726
Filing Date: 2004-06-29
Classification: H04L,Y10S

Abstract:
A cache server provided in an internal network, the cache server comprising:a cache-data-list table storing information concerning data retained by other cache servers on an individual cache server basis; a cache-data-list administrating unit receiving a data-inquiry request from one of said other cache servers, and searching said cache-data-list table for cache-server information indicating another one of said other cache servers retaining data regarding said data-inquiry request so as to send said cache-server information to said one of said other cache server; a relative-position information table storing information indicating a distance of at least one hop between each two of said other cache servers; and a control-data sending and receiving unit obtaining said distance between said one of said other cache servers and said another one of said other cache servers from said relative-position information table so as to order said one of said other cache servers to retain said data regarding said data-inquiry request depending on said distance; wherein said control-data sending and receiving unit orders said one of said other cache servers to retain said data regarding said data-inquiry request when said distance between said one of said other cache servers and said another one of said other cache servers is larger than a predetermined distance.