Method and system for creating and using common cache for internetwork

摘要

Improved methods and systems have been provided for accessing the latest version of the required data file as a data file downloaded from a source outside the dedicated network to the dedicated network. The object of the method and system of the present invention is achieved by the following description. A computer network is defined as being private in relation to one or more other computer networks. One or more computers in a dedicated network as defined above are defined to constitute a common cache. Copies of all data files entering the defined dedicated network from sources outside the defined dedicated network are stored in the cache on one or more computers that make up the common cache defined above. In response to a request from a computer of the defined dedicated network for a particular data file originating from a source outside the defined dedicated network, a copy of the requested specific data file exists in the defined common cache. To judge. If it is determined that a copy of the requested specific data file exists in the defined common cache, then obtain the latest version of the requested specific data file as present in the defined common cache. If it is determined that a copy of the requested specific data file does not exist in the defined common cache, the requested specific data file is obtained from a source outside the defined dedicated network.