Network system, cache method, cache program, management apparatus, management method, and management program

摘要

Provided is a network system capable of avoiding concentration of access to files and reducing the entire communication amount with a simple configuration. The network system includes a plurality of node devices that temporarily hold files to be transmitted and received. A node device is one of a plurality of groups for specifying a file to be held by the node device, and belongs to a group different from an adjacent node device in the network topology, and a file includes zero or more groups. Associated with the information shown. In addition, when a node device receives a file associated with information indicating a group to which the node device belongs, the node device temporarily stores the file as a cache file and a file requested by another node device. A cache transmission unit that transmits the cache file to another node device when the corresponding cache file is held.