Coordination between parallel TCP streams on Long Fat Pipe Network

“Data Reservoir” is a file sharing facility system which uses parallel streams for huge data transfer on Long Fat Pipe Network. While experimenting Data Reservoir system, we observed that performances of parallel streams disperse a lot, which results in damage on total performance. To equalize throughput of parallel streams, we propose “Dulling Edges of Cooperative Parallel streams(DECP)”. This paper shows our observation, implementation of interface for sharing information between streams and external scheduler, preliminary experiments to compare algorithms, then finally, experimental results of file transfer from disks to disks on one and a half round trip from Japan to U.S., for 15,000 miles, which has 350ms RTT and 8.2Gbps bandwidth in SC2003 bandwidth challenge.