SC09 Bandwidth Challenge, NetLogger monitored GridFTP servers at LLNL, NERSC, and ALCF. The graph below shows throughput from LLNL. The NetLogger analysis code summed overlapping transfers from each server (colored lines) and also summed all three servers to arrive at an estimate of overall throughput.
The graph shows the throughput from three servers at LLNL to the SC09 show floor. The colored lines are individual servers, and the grey line is the total. The server in red (gdo1) had disk problems which limited its throughput.
For more information, see:
The graph at right shows all file transfers between hosts at BNL (ending in bnl.gov) and the GridFTP server at PDSF (pdsfgrid3.lbl.gov), plotted with file-size in bytes versus achieved bandwidth in Mb/s.