A Load-balancing method for network GISs in a heterogeneous cluster-based system using access density

► Access to localized data and unbalanced server performance are the two factors. ► Adapts to the intensity of user access to obtain higher system throughput. ► Solves the lowest processing cost to obtain optimal response time. ► Distributes data requests according to content and servers' forwarding probability. ► The method increases the server performance and efficiency for large-scale traffic.