Heterogeneous clusters are becoming very popular for providing flexible, scalable and cost-effective solutions for high performance computing. An efficient resources utilization can significantly enhance cluster performance, specially in heterogeneous environments. So, load balancing is critical for achieving high performance in this systems. In this paper a dynamic, global, distributed, general purpose and automatically tuning itself off load balancing scheme is proposed for heterogeneous clusters. A new workload index is developed to take into account nodes heterogeneity. To verify and validate our approach, a complete set of experiments on a real heterogeneous cluster is presented too.
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