Two-level dynamic load-balance algorithm based on grid

The attribute of grid system is heterogeneous,dynamic and distributed,and the amount of grid resource is huge,this makes the grid task scheduling very complex.Focusing on the attribute of grid system,a two-level dynamic load-balance algorithm is designed based on the two-level tree model of grid.According to the problem exiting algorithms only consider unitary factor that can't satisfy the demand perfectly,this algorithm use several indexes to measure the load of grid nodes.