File Transfer over WAN
RIKEN - (Imnet) - APAN (~100 Mbps) -startap- ESnet - BNL
- Round Trip Time(RTT) for RIKEN-BNL :170 ms
- RFC1323 (TCP Extensions for high performance, May 1992) describes the method of using large TCP window-size (> 64 KB)
- FTP performance : 290 KB/s (64 KB windowsize), 640 KB/s(512KB window)
- Large TCP-window size is necessary to obtain high-transfer rate
BBFTP (http://doc.in2p3.fr/bbftp/)
- Software designed to quickly transfer files accross a wide area network.
- It has been written for the babar experiment in order to transfer big files
- transferring data through several parallel tcp streams
- RIKEN-BNL bbftp Performance (10 tcp streams for each session)
- 1.5 MB/s (1-sessinon) 3 MB/s (3-sessions)