Described is a technology by which a web proxy server evaluates its cached objects, and when an object is invalid, performs a freshness check on that object, independent of any client requests. As a result, the cache contains objects that have a greater likelihood of being fresh when requested by a client....http://www.google.fr/patents/US20080209120?utm_source=gb-gplus-shareBrevet US20080209120 - Accelerating cache performance by active cache validation
Accelerating cache performance by active cache validation
