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In data grid, co-allocation architecture was developed to enable parallel transferring of files from multiple replicas stored in the different servers. Several dynamic file transfer strategies based on co-allocation model have been proposed and used to exploit the different transfer rates among various client-server links and to address dynamic rate fluctuations by dividing files into multiple blocks of equal sizes. These schemes, which used for concurrently downloading a file from multiple replicas stored in multiple servers, overcome the obstacle of transfer performance due to idle waiting time of faster servers in co-allocation based file transfers and therefore, provide reduced file transfer time. In this paper, a tool with user friendly interface, called cyber transformer, is implemented and used to manage file replications and download files on data grid environments in parallel. This tool integrates eight methods including the previous and our proposed algorithms. Experimental results show that cyber transformer can obtain high-performance file transfer speed and reduce the time cost of parallel download.
Date of Conference: 24-26 Oct. 2008