Optimizing Large File Transfer on Data Grid

AMS02 science activities collaborated by Southeast university and CERN led by Samuel C.C. Ting are generating the unprecedented volume of data. The existing FTP has caused user to discomfort by delay and data loss according to network status. Therefore, it is necessary to efficiently raise transfer performance and minimize data loss. In this paper, we will introduce a new large file transfer tool based on QoS and multi-stream technologyBBFTP which is used in the AMS02 experiment. Through Monte Carol simulation data transfer experiments between SEU-SOC and ShanDong University node in ChinaGrid, we found the optimal parameters which help to promote BBFTP throughput performance. This paper focuses on related works about performance enhancement of large file transfer, which is critical to the performance of SOC (Science Operation Center).