"... The reliability and strength of internet connections can be assessed by listening to the sounds they make, according to Chris Chafe, a cellist and director of the Center for Computer Research in Music and Acoustics at Stanford University in California.
...
Chafe wondered if variations in jitter could be converted into a musical form. A musician can easily hear small changes in the tuning of a guitar string, so Chafe decided to model internet connections as guitar strings - twanging them to reveal subtle characteristics missed by pinging. ..."
Interestingly enough this is similar to the demo of "Kites" shown at the UIC EVL center during GGF6 -- only that was a visual demo of jitter and such!
Supercomputer to Use Optical Fibers
"... Highlighting a radical departure in the design of the fastest computers, the California Institute for Telecommunications and Information Technology plans to announce on Monday that it will use an optical router designed by a Texas company as the heart of a campus-wide supercomputer that will be woven together with optical fibers.
The new design will turn some traditional computing ideas upside down. In the past, computer processors have been the fastest part of a supercomputer, while memory and disk storage have been bottlenecks. In the new design, the communications lines will be the fastest part of the computer and the processors will become slower "peripherals."
The new style of supercomputing is called an "optiputer" and it will be housed at the University of California at San Diego. The optiputer will initially consist of about 500 processors linked via the optical switching system that will permit parts of the computer to share information at the speed of light. Each of the clusters is based on Intel microprocessors and runs the Linux operating system.
The optiputer is an example of a new trend in advanced computing, known as grid computing, which permits solving complex problems by linking processors that may be separated by thousands of miles.
Chiaro Networks, the maker of the optical router at the heart of the optiputer, is is a start-up in Richardson, Tex. ..."
February 2-5, 2003
FLORIDA INTERNATIONAL UNIVERSITY
Miami, Florida
"... As with previous Joint Techs Meetings, the agenda will include a combination of advanced technology, infrastructure updates, and case study sessions. Special focus areas for this meeting will be announced. Birds-of-a-Feather (BOF) meetings will again be encouraged. Please contact one of the Co-chairs, Janet Brown (brown@psc.edu), or Paul Love (epl@internet2.edu) if you would like to schedule a BOF. ..."
Ohio Gigapop Traffic measurements a presentation by Mark Fullmer about flows and NetFlow.
"... The flow-capture utility will receive and store NetFlow exports to disk. The flow files are rotated rotationstimes per day and expiration of old flow files can be configured by number of files or total space utilization. Files are stored in workdir and can optionally be stored in additional levels of directories. Active files created by flow-capture begin with 'tmp'. Files that are complete begin with 'ft'. ..."
from Mark Fullmer @ OSU
The OSU Flow-tools Package and Cisco NetFlow Logs
"... Many Cisco routers and switches support NetFlow services which provides a detailed source of data about network traffic. The Office of Information Technology Enterprise Networking Services group (OIT/ENS) at The Ohio State University (OSU) has written a suite of tools called flow-tools to record, filter, print and analyze flow logs derived from exports of NetFlow accounting records. We use the flow logs for general network planning, performance monitoring, usage based billing, and many security related tasks including incident response and intrusion detection. This paper describes what the flow logs contain, the tools we have written to store and process these logs, and discusses how we have used the logs and the tools to perform network management and security functions at OSU. We also discuss some related projects and our future plans at the end of the paper. ..."
Ars Technica: Understanding Bandwidth and Latency - Page 1 - (11/2002)
"... From the bygone debates over DDR vs. RDRAM to the current controversy over Apple's DDR implementations, one issue is commonly misunderstood in most discussions of memory technology: the nature of the relationship between bandwidth and latency. This article aims to give you a basic grasp of the complex and subtle interaction between bandwidth and latency, so that the next time you see bandwidth numbers quoted for a system you'll be able to better understand how those numbers translate into real-world performance. ..."
CCR solicits papers on the broad topic of tools and technologies that support networking research and education. Example topics of interest include:
Highly scalable simulators and simulation algorithms - parallel,
multi-level abstraction, etc.
Networking testbeds and testbed support technologies
Tools for visualization of network behavior or performance
Modular, extensible router and switching platforms (software or hardware)
Rapid prototyping environments for network protocols
Special purpose and application-specific network simulation tools
Measurement and instrumentation strategies and platforms