Method and system for creating and utilizing common caches for internetworks

摘要

An improved method and system for accessing the most recent version of a requested data file that has been downloaded into a private network from a source external to the private network. The objects of the method and system are achieved as is now described. A network of computers is defined as private relative to one or more other networks of computers. More than one computer within said defined private network is specified as composing a "common cache." A copy of any data file entering the defined private network from a source external to the defined private network is cached at one or more computers which compose the defined "common cache." In response to a request from a computer within the defined private network for a specific data file which originates from a source external to the defined private network, a determination is made as to whether a copy of the requested specific data file is resident within the defined "common cache." The most recent version of the requested specific data file which is resident within said defined "common cache" is obtained if it was determined that a copy of the requested specific data file is resident within the defined "common cache. " The requested specific data file is obtained from a source external to the defined private network if it was determined that a copy of the requested specific data file is not resident within the defined "common cache."