US Patent 9104497 Method and system for work load balancing

Method, system, and programs for balancing work load in a distributed system. A plurality of resource units in the distributed system are ranked based a plurality of multi-dimensional load metrics determined from each of the plurality of resource units. The plurality of resource units are divided into a plurality of resource unit groups based on the ranking of the plurality of resource units. At least one pair of resource unit groups is formed. Each of the at least one pair of resource unit groups is assigned with a probability of load balancing action. For each pair of resource unit groups, a load balancing action is determined based on the assigned probability of load balancing action.