1. 1 PingER performance to Bangladesh Prepared by Les Cottrell, SLAC for Prof. Hilda Cerdeira May 27, 2004 Partially funded by DOE/MICS Field Work Proposal on Internet End-to-end Performance Monitoring (IEPM), also supported by IUPAP

2. 2 Methodology Use ubiquitous ping Each 30 minutes from monitoring site to target : –1 ping to prime caches –by default send11x100Byte pkts followed by 10x1000Byte pkts Low network impact + no software to install / configure / maintain at remote sites + no passwords / accounts needed = good for developing sites / regions Record loss & RTT, (+ reorders, duplicates) Derive throughput, jitter, unreachability …

3. 3 Architecture Hierarchical vs. full mesh WWW Archive Monitoring Remote FNAL Reports & Data Cache Monitoring SLAC Ping HTTP Archive 1 monitor host remote host pair ~35 ~550

4. 4 Regions Monitored Recent added NIIT PK as monitoring site White = no host monitored in country Colors indicate regions Also have affinity groups (VOs), e.g. AMPATH, Silk Road, CMS, XIWT and can select multiple groups Monitoring sites in ~ 35 countries

5. 5 Bangladesh RTT ms Loss RTT & Loss SLAC to www.ru.ac.bd Feb – May ‘04www.ru.ac.bd

6. 6 Indian sub-continent Derived throughput = packet size/(RTT * sqrt(loss))

7. 7 World Log scale so straight line shows exponential improvement Indian sub-continent 7 years behind Europe Falling behind

8. 8 More Information Contact cottrell@slac.stanford.edu to request monitoring of a host/site in Bangladeshcottrell@slac.stanford.edu –Requirements for host being monitored http://www.slac.stanford.edu/comp/net/wan-req.html PingER –http://www-iepm.slac.stanford.edu/pinger/http://www-iepm.slac.stanford.edu/pinger/ ICFA/SCIC Monitoring Report Jan 2004 –http://www.slac.stanford.edu/xorg/icfa/icfa-net- paper-jan04/http://www.slac.stanford.edu/xorg/icfa/icfa-net- paper-jan04/