The present invention presents a method and system for upgrading a live system. With the benefits of this invention a live system can be upgraded to a new version and then tested without significant downtime. If the upgrade fails the system can continue to run on a backed-up environment until the upgraded...http://www.google.co.uk/patents/US7555751?utm_source=gb-gplus-sharePatent US7555751 - Method and system for performing a live system upgrade
