A technique for automatic, transparent, distributed, scalable and robust caching, prefetching, and replication in a computer network that request messages for a particular document follow paths from the clients to a home server that form a routing graph. Client request messages are routed up the graph...http://www.google.com/patents/US6167438?utm_source=gb-gplus-sharePatent US6167438 - Method and system for distributed caching, prefetching and replication
