A special-purpose appliance (SPA) works in conjunction with a server farm consisting of multiple caching server appliances (CSAs) to supervise a local storage medium (i.e., a shared cache) that is accessible by all the CSAs for storing at least some of the remote objects such as web pages and their embedded...http://www.google.de/patents/US6868439?utm_source=gb-gplus-sharePatent US6868439 - System and method for supervising use of shared storage by multiple caching servers physically connected through a switching router to said shared storage via a robust high speed connection
