【作者】 李钧； 王新；

【Author】 Li Jun and Wang Xin (School of Computer Science,Fudan University,Shanghai 200433)

【机构】 复旦大学计算机科学技术学院；

【摘要】 在P2P存储网络中,为保证数据安全可靠,当网络中数据丢失后需生成新的冗余数据.因此,如何快速生成新的冗余数据并保持数据的可靠性就成为评价存储网络性能的关键.网络编码作为一项新兴技术,已被证明可以提高网络吞吐率和鲁棒性.将网络编码思想引入冗余数据维持,可以加快冗余生成速度,从而提高数据可靠性.通过理论分析和仿真给出了快速修复冗余数据的方法、开销和相应的传输策略.仿真结果表明,较传统修复方式所提出的快速修复方法可以节省60%以上的传输时间.更多还原

【Abstract】 In peer-to-peer networks,new redundancy should be regenerated when there is data loss in the network in order to keep data safe and reliable.Therefore,how to regenerate new redundancy becomes a key to evaluate the performance of network storage systems.Network coding,as a novel technology,has been proved to improve the throughput and robustness of the network.In this paper, network coding is introduced into redundancy maintenance,so as to accelerate regeneration of new redundancy and improve the data reliability.By theoretical analysis,a fast method is given to regenerate new redundancy,its cost,and transmission scheme.The simulation results show that the proposed method can save transmission time in comparison with the traditional transmission scheme by more than 60%.更多还原