摘要
旨在通过数据复制来提高非结构化P2P系统的数据访问效能,提出了基于访问频率的复制策略—AFRE算法,该算法通过赋予不同时间片的访问记录不同的权重,计算数据的局部访问频率,并将适量的数据副本放置到节点度较大的节点.实验证明,提出的复制策略在副本总数明显减少的情况下,能够获得较好的平均查询长度及优于其他常用复制策略的查询成功率.
This paper present AFRE, an access frequencies-based replication strategy for unstructured peer-to-peer systerns. The goal of our method is to improve data access performance for unstructured peer-to-peer systems through data replication. APRE algorithm calculates data access frequencies in local area through enduing different time intervals with different weights, then place appropriate number of replicas into peers with larger degrees. The simulation results show that AFRE successfully increases the success rate and has a better performance for average search size, when reducing total replica amounts.
出处
《微电子学与计算机》
CSCD
北大核心
2008年第10期133-136,共4页
Microelectronics & Computer
关键词
访问频率
非结构化
P2P
复制策略
access frequencies
unstructured
P2P
replication strategy
