关键词: 副本技术，ARMS，均衡，随机因子

Abstract: Replication technology is one of the main technologies to improve the data availability, data access efficiency of the structured P2P networks. Though ARMS can choose the stable nodes, it also causes the problem that the replicas are in imbalance distribution. In order to choose stable nodes and avoid too many replicas saved by one node, based on analyzing the disadvantage of the ARMS, this paper presented the randonrand-age-based replication maintenance strategy(RARMS). I}his strategy adds the random factor on the ARMS, in this way the replica can keep on stable and be distributed uniformly in some area. The theoretical analysis and experimental verification demonstrate that this strategy combines the advantages of the random neighbor selection strategy and the ARMS, and can achieve the desired effect a hove. In addition, after analyzing the selected value of the random factor s，this paper got the conclusion that when the value L/r is equalled by the s,it can be better.

Key words: Replication technology, ARMS, Balance, Random factor