Using optorsim to efficiently simulate replica placement strategies  

作　　者：REN Xun-yi WANG Ru-chuan KONG Qiang 

机构地区：[1]College of Computer, Nanjing University of Posts and Telecommunications, Nanjing 210003, China [2]State Key Laboratory for Novel Software Technology, Nanjing University, Nanjing 210093, China

出　　处：《The Journal of China Universities of Posts and Telecommunications》2010年第1期111-119,共9页中国邮电高校学报（英文版）

基　　金：sponsored by the National Natural Science Foundation of China (60573141,60773041);the Hi-Tech Research and Development Program of China (2006AA01Z201,2006AA01Z439,2007AA01Z404, 2007AA01Z478);High Technology Research Program of Jiangsu Province (BG2006001);Foundation of National Laboratory for Modern Communications (9140C1105040805);Jiangsu Provincial Research Scheme of Natural Science for Higher Education Institutions (07KJB520083);Innovation Fund of Nanjing University of Posts and Telecommunications (NY208006)

摘　　要：Optorsim provides simulations of file replication strategies such as replica placement, replication scheduling, replica consistency maintenance, etc. However, to assess a replica strategy a researcher must write network configuration files and repeatedly modify parameters, which is inefficient. In this article, a scale-free algorithm is developed to generate network topology which is loaded into Optorsim, and a graphical user interface （GUI） is implemented to set all configuration parameters and algorithm parameters. Moreover, a new replica placement strategy, the replica creation （PC） algorithm, is proposed based on ＇social ability＇. Through the GUI, parameters could be conveniently modified to debug proposed algorithm. The simulation results demonstrate that the RC algorithm can reduce both processing time and storage consumption. Meanwhile, the simulation experience shows that working with Optorsim through the GUI is efficient.Optorsim provides simulations of file replication strategies such as replica placement, replication scheduling, replica consistency maintenance, etc. However, to assess a replica strategy a researcher must write network configuration files and repeatedly modify parameters, which is inefficient. In this article, a scale-free algorithm is developed to generate network topology which is loaded into Optorsim, and a graphical user interface （GUI） is implemented to set all configuration parameters and algorithm parameters. Moreover, a new replica placement strategy, the replica creation （PC） algorithm, is proposed based on ＇social ability＇. Through the GUI, parameters could be conveniently modified to debug proposed algorithm. The simulation results demonstrate that the RC algorithm can reduce both processing time and storage consumption. Meanwhile, the simulation experience shows that working with Optorsim through the GUI is efficient.

关 键 词：OPTORSIM data grid replica replacement SIMULATION 

分 类 号：TP393[自动化与计算机技术—计算机应用技术] TP311.52[自动化与计算机技术—计算机科学与技术]