Report on IEPM PPDG efforts for PPDG for the
quarter October - December 2003
Report prepared by Les Cottrell, January 24, 2004
Collaboration with IEPM, Network Performance Monitoring
The new IEPM-BW Oracle backend database now provides easier ways to search through the IEPM-BW data.
We followed this up by providing Grid services access to the data utilizing the GGF
naming recommendations. To demonstrate the utilization we created a
to interactively access the IEPM-BW data via the Grid services
interface. More information on the Grid services access can be found at
the IEPM Web
Services page. Our next steps will be to provide similar access to the
PingER data.Lee anmd Paul Meallor) to discuss and understand the OGSI schema.
Following this Warren worked on porting the
to an OGSI type grid service using the
We co-authored and submitted the GGF NMWG recommendation entitled
Hierarchy of Network Performance Characteristics for Grid Applications and
Data Presentation and Visualization
We extended our traceroute visualization tool to add: drill down to view
available bandwidth time-series for the selected path; and to allow navigation
through the historical archives of traceroutes. We wrote, submitted and had
accepted an extended abstract short abstract on
Correlating Internet Performance Changes and Route Changes to Assist in
Trouble-shooting from an End-user Perspective, that describes this work.
There is increasing interest from the HENP and other scientific communities
to understand and do something about the Digital Divide, i.e. the difference
in Internet performance to developing and developed countries. Since 10-20%
of HEP collaborators on the major experiments come from countries in
developing nations, this is very important to HENP.
We prepared the
January 2004 Report of the ICFA-SCIC Monitoring Working Group for
In preparation for the WSIS in Geneva and the ICFA/SCIC Digital Divide meeting
in Rio de Janiero in Feb 2004, we extended the number of remote sites monitored
by about 10%. This was focused on providing better information on the Internet
performance to developing countries. We also worked with NIIT Pakistan to
successfully install a monitoring node there. This brings the number of countries
with monitoring hosts to 13.
results for NIIT were provided to the director of NIIT for a presentation
recommending upgrading their connectivity.
High speed networking
We attended and
exhibited our monitoring projects at the SLAC/FNAL booth at
SC2003. In addition, we
once again participated in the
Challenge. SLAC's challenge, in collaboration with Caltech and LANL, this
Distributed Particle Physics Analysis using Ultra High Speed TCP on the Grid
and it captured the SuperComputing 2003 Bandwidth Challenge award for the most
data transferred (6.6TBytes in under 50 minutes)..
We co-authored a paper with LANL and Caltech on
Optimizing 10-Gigabit Ethernet in Networks of Workstations, Clusters, and Grids: A Case Study
that was accepted and presented at SC2003.
As co-chair of the 2nd
Protocols for Fast
Long Distance Networks to be held in Chicago in February 2004, we organized
a review team, and reviewed and selected papers to be presented.
We started to work on automated fault finding by looking at the IEPM-BW
monitoring data. We presented
Meaurement and fault finding using MAGGIE and PIPES at the Internet2
Member meeting, Indianapolis Oct.13-16.
Advanced TCP STack Evaluation
With the emergence of many new advanced TCP
Westwood+ ...) stacks that are trying to
provide high-, fair-, stable-, responsive-performance on fast long-distance
paths without needing to resort to using multiple parallel streams, it is
important to evaluate and compare these stacks on high-speed production links to
understand their domains of applicability etc. We made measurements on
three different length production Internet paths to understand and compare the
performance of seven different TCP stacks. We submitted and had accepted by
PFLDnet a paper entitled
Advanced TCP Stacks on Fast Long-Distance Production Networks.
To facilitate the installation and testing of HSTCP-LP (a fusion of HS-TCP
and TCP-LP) Aleksander Kuzmanovic, a student from Rice University, spent 3
fruitful weeks at SLAC assisting with the installation and providing
fixes, enhancements as we tested and found out more
about the stack on our fast, production links. We also submitted and had
accepted by PFLDnet a paper entitled
Protocal for Low-Priority Bulk Data Transfer in High-Speed High-RTT Networks
We submitted and had accepted two pre-proposals to the DoE Office of Science:
- Measurement and Analysis for the Global Grid and Internet End-to-end
performance (MAGGIE) - with LBNL, Internet2, PSC, and U Delaware
- INCITE Ultra – New Protocols, Tools, Security, and Testbeds for Ultra
High-Speed Networking - with Rice and LANL
We also worked with eJDS on putting together a proposal for PingER funding for
Following renewed interest in IPv6 to support large numbers of IP
addresses that will be needed as more and more objects (phones, soldiers,
mines, personal devices etc.) are networked, we revived our IPv6 monitoring
effort. Paola prepared
a presentation on IPv6 for the
Internet2 Joint Techs Workshop in August at Lawrence, Kansas.
We added two
Network Problem Case studies. One was on
to Hangzhou China, the other on
routing resulting a reduction of performance by a factor of 5 between SLAC and