ET SIG: New ideas in Distributed Architectures



  • "Extreme Overload and Concurrency in Internet Services" and "Why Grid Computing Will Take Over the World".

    Extreme Overload and Concurrency in Internet Services

    Matt Welsh (bio), Senior Researcher - Intel Research
    Click here to view Matt's meeting presentation.

    Why Grid Computing Will Take Over the World

    Frank Siebenlist (bio), Senior Software Architect - Globus Project
    Click here to view Frank's meeting presentation.


    Presentation Overview

    Extreme Overload and Concurrency in Internet Services

    Internet services -- such as search engines, stock trading, e-commerce, and news sites -- are subject to enormous variations in load. The well-documented "Slashdot effect" demonstrates what happens to an Internet service when it suddenly becomes very popular: typically, the service buckles under the overload, giving the impression that it has crashed. Distributed denial-of-service attacks, software bugs, and hardware failures can all result in serious overload conditions, often resulting in outages, angry users, and sometimes even lawsuits.

    Managing the performance a busy Internet service is a major challenge, though most operating systems and Web servers do very little to solve this problem. For example, many Web servers use threads or processes to manage concurrency, though these techniques tend not to scale and yield little control over resource usage.

    In this talk, I will discuss recent work dealing with overload using the staged event-driven architecture (SEDA), a new design for large-scale servers that supports massive concurrency, an event-driven programming model, and adaptive resource management. SEDA has been adopted by several large Internet services as well as a few startups. I have demonstrated a SEDA-based Web server, implemented in Java, that outperforms two popular Web servers (Apache and Flash) that are implemented in C. The SEDA code is open source and is available online.

    Why Grid Computing Will Take Over the World

    There is an awful amount of hype about Grid Computing, and the word "Grid" is now part of the standard vocabulary of every vendor's marketeers. We'll be soon plugging our palm-pilots, toasters and fridge into the "Grid", where we will share all the unused cpu-cycles to give us all unlimited compute power. This presentation will try to explain what the "real" Grid is, where its technology is going, and why you should care. Technical details of the Open Grid Services Architecture (OGSA) will be discussed, and how it embraces and extends Web Services.


    About the Presenters


    Matt Welsh, Senior Researcher at Intel Research

    Matt Welsh is a senior researcher at Intel Research in Berkeley, California, and will be joining the Computer Science faculty at Harvard University in July. His research interests span many aspects of complex distributed systems. At Intel Research, Matt is currently working on novel OS and language support for sensor networks -- consisting of thousands of tiny wireless "motes" each with a low-power CPU, radio, and a little memory. He is also a long-time Linux hacker and is the author of "Running Linux", published by O'Reilly and Associates. Matt holds a Ph.D. in Computer Science from UC Berkeley.


    Frank Siebenlist, Senior Software Architect at Globus Project

    Frank Siebenlist is a senior software architect at the Argonne National Laboratory on the Globus team, who spends most of his time on the development of the Open Grid Services Architecture (OGSA). Frank has a Ph.D. in Physics from the University of Amsterdam. He has extensive experience with distributed computing and security.

    Frank has worked for major financial institutions (VP at Citibank and Senior Consultant at J.P. Morgan) in Hong Kong and New York. He has also worked for a number of technology companies, including start-ups in Silicon Valley (Chief Architect at DASCOM and Chief Security Architect at Eazel), and at IBM as a Senior Security Architect.

    Dr. Siebenlist authored a number of security related standards at X/Open (Open Group), and influenced and contributed to numerous others at the IETF and OMG. Frank lives with his family in Los Gatos, California.


    Event Logistics


    Cubberley Community Center
    4000 Middlefield Road, Room H-1
    Palo Alto, CA


    6:30-7:00pm registration/networking/refreshments/pizza
    7:00-8:00pm first presentation
    8:00-9:00pm second presenation


    $15 at the door for non-SDForum members
    No charge for SDForum members
    Free for AAMA members for the month of Feb 2003
    Please call 408.494.8378 for student memberships
    No registration required

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