WAN performance test
RIKEN (12 Mbps) - IMnet - APAN (70 Mbps) -startap- ESnet - BNL
- Round Trip Time for RIKEN-BNL :170 ms
- File transfer rate is 47 kB/s for 8 kB TCP widowsize (Solaris default)
- Large TCP-window size is necessary to obtain high-transfer rate
- RFC1323 (TCP Extensions for high performance, May 1992) describes the method of using large TCP window-size (> 64 KB)
- Large ftp performance (641 kB/s = 5 Mbps) was obtained for a single ftp connection using a large TCP window-size (512 kB) over the pacific ocean (RTT = 170 ms)