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 netwo...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.展开更多
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)+3 种基金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)
文摘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.
