中文摘要：

通过对分布式系统节点可靠性与负载的分析,结合增加系统可靠性和负载平衡程度的目的,设计了基于系统可靠性与负载平衡的分布式系统副本管理算法.虽然其实现较为复杂,但在平衡程度,平衡时间等性能上较已有算法有较大的提高.

英文摘要：

Through analyzing the reliability and load of the nodes in a distributing system,with increasing the reliability and the level of load balance of the distributing system,a algorithm of distributing transcript management has been proposed in this paper. It can evidently improve the performances such as the time and level of balance though its implementation is very complex.