摘要： 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。

关键词: 异构分布式系统, HDL算法, 负载均衡, 容错

Abstract: Based on the base/deputy version technology, this paper presents a heterogeneous distributed fault tolerance schedule model and HDL algorithm 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.

Key words: heterogeneous distributed systems, HDL algorithm, load balance, fault tolerance

中图分类号: 

• TP311