1. DataGrid WP7 Meeting Amsterdam Nov 01 R. Hughes-Jones Manchester 1 UDPmon Measuring Throughput with UDP  Send a burst of UDP frames spaced at regular intervals  Vary the frame size and the frame transmit spacing  Record  The time to send and the time to receive the frames  The number received, the number lost, number out of order  The received inter-packet spacing Zero stats OK done ●●● Get remote statistics Send statistics Send data frames at regular intervals ●●● Time to send Time to receive Inter-packet time

2. DataGrid WP7 Meeting Amsterdam Nov 01 R. Hughes-Jones Manchester 2 UDPmon – Status  Tool operational at Manchester  RAL UCL Bologna Lyon NBI CERN SARA  And CERN  MAN RAL Bologna Lyon SARA  Cgi script to generate web.gif display – based on Pinger  Web page rather primitive – will include Antony’s  Cgi script for LDAP access discussed – simple mod!  Cgi script for extraction of data for comparison half discussed!!

3. DataGrid WP7 Meeting Amsterdam Nov 01 R. Hughes-Jones Manchester 3 Ping & UDP throughput MAN-CERN From 20 Oct 01 PingER rtt (ms) dl – cern 1000 byte packet Forecast UDPmon throughput Mbit/s man – cern 300 * 1400 byte frames

4. DataGrid WP7 Meeting Amsterdam Nov 01 R. Hughes-Jones Manchester 4 iperf & UDP throughput MAN-CERN From 20 Oct 01 Iperf throughput ucl – cern 262144 byte buffer Forecast UDPmon throughput Mbit/s man – cern 300 * 1400 byte frames

5. DataGrid WP7 Meeting Amsterdam Nov 01 R. Hughes-Jones Manchester 5 UDP Loss & throughput MAN-Lyon From 20 Oct 01 UDPmon packet loss man – lyon 300 * 1400 byte frames UDPmon throughput Mbit/s man – lyon 300 * 1400 byte frames

6. DataGrid WP7 Meeting Amsterdam Nov 01 R. Hughes-Jones Manchester 6 Ping & UDP throughput MAN-Lyon From 20 Oct 01 PingER rtt (ms) dl – Lyon 1000 byte packet Forecast UDPmon throughput Mbit/s man – Lyon 300 * 1400 byte frames

7. DataGrid WP7 Meeting Amsterdam Nov 01 R. Hughes-Jones Manchester 7 Ping & UDP throughput MAN-RAL From 20 Oct 01 PingER rtt (ms) dl – RAL 1000 byte packet Forecast UDPmon Zero packet loss! UDPmon throughput Mbit/s man – RAL 300 * 1400 byte frames

8. DataGrid WP7 Meeting Amsterdam Nov 01 R. Hughes-Jones Manchester 8 UDP Loss & throughput MAN-SARA From 20 Oct 01 UDPmon packet loss man – SARA 300 * 1400 byte frames UDPmon throughput Mbit/s man – SARA 300 * 1400 byte frames

9. DataGrid WP7 Meeting Amsterdam Nov 01 R. Hughes-Jones Manchester 9 Ping & UDP throughput MAN-SARA From 20 Oct 01 PingER rtt (ms) dl – sara 1000 byte packet Forecast UDPmon throughput Mbit/s man – sara 300 * 1400 byte frames

10. DataGrid WP7 Meeting Amsterdam Nov 01 R. Hughes-Jones Manchester 10 iperf & UDP throughput MAN-SARA From 20 Oct 01 Iperf throughput ucl – sara 262144 byte buffer Forecast UDPmon throughput Mbit/s man – sara 300 * 1400 byte frames

11. DataGrid WP7 Meeting Amsterdam Nov 01 R. Hughes-Jones Manchester 11 Other comparisons

12. DataGrid WP7 Meeting Amsterdam Nov 01 R. Hughes-Jones Manchester 12 UDP Frame Jitter

13. DataGrid WP7 Meeting Amsterdam Nov 01 R. Hughes-Jones Manchester 13 iperf & Pinger UK-Bologna From 20 Oct 01 Iperf throughput ucl – Bologna 262144 byte buffer Forecast PingER rtt (ms) dl – Bologna 1000 byte packet Forecast

14. DataGrid WP7 Meeting Amsterdam Nov 01 R. Hughes-Jones Manchester 14 iperf & Pinger UK-Bologna From 20 Oct 01 Iperf throughput ucl – Bologna 262144 byte buffer Forecast PingER rtt (ms) dl – Bologna 100 byte packet Forecast

15. DataGrid WP7 Meeting Amsterdam Nov 01 R. Hughes-Jones Manchester 15 RIPE 1-way & TCP throughput UK-Bologna RIPE 1-way time ms Bologna  RAL 20 Oct 01 RIPE 1-way time ms RAL  Bologna TCP Iperf + prediction Mbit/s UCL  Bologna

16. DataGrid WP7 Meeting Amsterdam Nov 01 R. Hughes-Jones Manchester 16 RIPE 1-way & TCP throughput UK-SARA RIPE 1-way time ms Sara  RAL 20 Oct 01 RIPE 1-way time ms RAL  Sara TCP Iperf + prediction Mbit/s UCL  Sara