Abstract: The invention is a system and method for ensuring that a storage virtualization system performs as a trusted delegate for a user attempting to access data on an authenticated server. Data is moved from a first server to a second server by a storage virtualization system. Even though the user may have been authenticated to access the first server, the storage virtualization system which re-directs user requests to the migrated data on the second server may not be authenticated. The first time a user is re-directed to the second server, the storage virtualization system will obtain request to act as a trusted delegate for the user by communicating with a third server, such as a Kerberos domain controller. After the storage virtualization system is properly authenticated as a trusted delegate for the user, future re-directed requests will be seamless and transparent to the user.

Abstract: The invention provides a system and method for managing network routing utilizing mathematical analysis. The method includes the act of copying a current setting of link costs to a new setting and utilizing the new setting of link cost to compute the shortest path routes used for all source and destination pairs. For each of the source destination pair, corresponding traffic volume is cast to each link along the route. In case of multiple routes with equal routes, traffic is split among the routes. Next, the traffic caused by all source and destination pairs is summed up to get the utilization of each link. Then, the value of objective function of utilization and link cost is computed. If a minimum is determined, the new setting of link cost is installed. If not, the utilization of each link is mapped into a new link cost and the shortest path routes are computed over.