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Load balance is an important problem of cluster. The core of cluster task distribution is the load balance algorithm. LVS load balance technology is introduced briefly, the known load balancing algorithms and their merits and demerits are discussed in this paper; A Residual Load Rate based the combination of static and dynamic balance strategy is proposed after analyzing static balance technology and dynamic balance technology on the purpose of improving the performance of cluster systems. The balance strategy combination of static and dynamic balance algorithm, not only to overcome the static load balancing does not take into account real-time loads and reduces times of dispatching assignments between nodes, prevents the servers to be skew, and improves the performance of cluster systems.