System simulation model for clusters

To further improve the efficiency and resource utilization and reduce the research costs, we proposed a cluster system simulation model entirely implemented by software. The model focuses on features cluster shown at the system level, using network simulation software OPNET as the modeling tool which can be run in a personal computer. A series of characters of the cluster system are depicted, such as the number of nodes, numbers of processors belong to each node, inter-node communication bandwidth and data volume, user's job queue, conventional job scheduling algorithm, and scalable model interface. By working with a real small-scale cluster system, we show that the model has good simulation results and effectively reduces the hardware cost.