Transcript The PingER Project: Measuring the Digital Divide Presented by Les Cottrell, SLAC At the SIS Show Palexpo/Geneva December 2003 PingER.

The PingER Project:
Measuring the Digital Divide
Presented by Les Cottrell, SLAC
At the SIS Show Palexpo/Geneva December 2003
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PingER
History of the PingER
Project
• Early 1990’s: SLAC begins pinging nodes around the world to
evaluate the quality of Internet connectivity between SLAC
and other HEP Institutions.
• Around 1996: The PingER project was funded making it the
first Internet end-to-end monitoring tool available to the HEP
community.
• Today: Believed to be the most extensive Internet end-to-end
performance monitoring tool in the world
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PingER
PingER Today
• Today, the PingER Project includes 35 Monitoringhosts in 12 countries. They are monitoring Remotehosts in 80 countries.
• THESE COUNTRIES COVER 75% OF THE WORLD
POPULATION AND 99% OF THE INTERNET
CONNECTED POPULATION!!!
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PingER
Methodology
Internet
Monitoring
host
Measure Round Trip Time & Loss
Remote
Host
(typically
a server)
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PingER Architecture
There are three types of
hosts
• Remote-hosts:
hosts being
monitored
REMOTE
REMOTE
REMOTE
REMOTE
REMOTE
REMOTE
REMOTE
REMOTE
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PingER
PingER Architecture
There are three types of
hosts
• Remote-hosts:
hosts being
monitored
Monitoring
• Monitoring-hosts:
Monitoring
Monitoring
make ping
measurements to
REMOTE
REMOTE
remote hosts
REMOTE
REMOTE
Monitoring
REMOTE
REMOTE
REMOTE
REMOTE
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PingER
PingER Architecture
There are three types of
hosts
• Remote-hosts:
hosts being
monitored
Monitoring
• Monitoring-hosts:
Monitoring
Monitoring
Make ping
measurements to
REMOTE
REMOTE
remote hosts
REMOTE
REMOTE
REMOTE
• Archive/AnalysisREMOTE
REMOTE
hosts: gather data from
Monitoring-sites, analyze
& make reports
Archive
Archive
PingER
Monitoring
REMOTE
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Worldwide performance
• Performance is
improving
• Developed world
improving factor of
10 in 4-5 years
• S.E. Europe,
Russia, catching up
• India & Africa
worse off & falling
behind
• Developing world
3-10 years behind
• Many institutes in developing world have less performance
than a household in N. America or Europe
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Current State – Aug ‘03
(throughput Mbps)
Remote regions
Monitoring Country
• Within region performance better
– E.g. Ca|EDU|GOV-NA, Hu-SE Eu, Eu-Eu, Jp-E Asia, Au-Au, RuRu|Baltics
• Africa, Caucasus, Central & S. Asia all bad
Bad < 200kbits/s < DSL
Poor > 200 < 500kbits/s
Acceptable > 500kbits/s, < 1000kbits/s
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Good > 1000kbits/s
Loss Comparisons with
Development (UNDP)
Positive
correlation
with Human
Development
or GDP
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Network Readiness
Index vs Throughput
• NRI from Center for International Development,
Harvard U.
http://www.cid.harvard.edu/cr/pdf/gitrr2002_ch02.pdf
Internet for all focus
5.92
5.79
5.74
5.58
5.51
5.44
5.35
5.33
5.31
5.29
5.28
5.22
5.18
5.10
A&R focus
NRI Top 14
Finland
US
Singapore
Sweden
Iceland
Canada
UK
Denmark
Taiwan
Germany
Netherlands
Israel
Switzerland
Korea
• NRI correlates reasonably well with
Network Readiness
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Typical uses
•
Troubleshooting
 Discerning if a reported problem is network related
 Identify the time a problem started
 Provide quantitative analysis for Network
specialists
 Identifying step functions, periodic network
behavior, and recognize problems affecting multiple
sites.
 Setting expectations
 Identifying need to upgrade
 Providing quantitative information to Policy
makers & Funding agencies
 Seeing the effects of upgrades
PingER
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In Summary
PingER provides ongoing support for monitoring and
maintaining the quality of Internet connectivity for
the world wide scientific community.
Information is available publicly on the web
www-iepm.slac.stanford.edu/cgi-wrap/pingtable.pl
PingER also quantifies the extent of the “Digital
Divide” and provides information to policy makers
and funding agencies.
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PingER
For More Information
• We need contacts in developing countries
– (send email to [email protected])
• PingER:
– www-iepm.slac.stanford.edu/pinger/
• eJDS
– www.ejds.org/
• ICFA/SCIC Network Monitoring report, Jan03
– www.slac.stanford.edu/xorg/icfa/icfa-net-paperdec02
• Monitoring the Digital Divide, CHEP03 paper
– http://arxiv.org/ftp/physics/papers/0305/0305016.pdf
• The PingER Project: Active Internet Performance Monitoring for
the HENP Community, IEEE Communications Magazine on
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Network Traffic Measurements and Experiments.
PingER