Based on the base/deputy version technology, this paper presents a heterogeneous distributed fault tolerance schedule model and HDL algorithin is given.The algorithm overcomes instability problems of the previous algorithm to balance the load before and after failure, and a certain extent achieves a balanced controllability, while the covariance-based load balance approaches are given in simulation experiment.Experimental results show the load balance of the algorithm is stabile before and after a failure occurs.%基于基/副版本技术提出一种异构分布式容错调度模型,并在该模型上提出HDL算法.该算法克服了以前算法在故障发生前后负载均衡性不稳定问题,并在一定程序上实现均衡可控性,同时在模拟实验中给出一种基于协方差反映负载均衡性的方法.实验结果证明,该算法的负载均衡性在故障发生前后是稳定的.
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