ColloquiaAlexandros Labrinidis - talk on Monday, April 8
Margery Ishmael
marge at cs.uchicago.edu
Wed Apr 3 15:45:55 CST 2002
Monday, April 8, 2002
2:30 pm
Ryerson 251
Alexandros Labrinidis
Department of Computer Science
University of Maryland
Title: "WebView Materialization for Scalable Web Servers"
Abstract:
The frustration of broken links from the early Web has been replaced
today by the frustration of web servers stalling or crashing under the
heavy load of dynamically generated content. Even seemingly static web
pages are usually generated dynamically in order to include
personalization and advertising features. Such dynamic content has
high resource demands and poses a scalability problem for both web and
database servers.
In my work, I have used view materialization techniques to ameliorate
this scalability problem. I introduced WebViews to identify
frequently accessed web page fragments which are dynamically
generated. With materialization, these WebViews are constantly
refreshed in the background in anticipation of future requests.
WebView materialization drastically improves Quality of Service (QoS),
but poses new challenges: (1) the selection of WebViews to materialize
has to be performed in real-time, with limited knowledge of the access
and update patterns, and must adapt rapidly to changing web workloads,
(2) the Quality of Data served (QoD) must be considered during the
selection process, and, (3) scheduling the updates in the background
concurrently with user requests has a significant impact on the QoD.
In this talk, I will describe how to bridge the gap between QoS and
QoD in scalable, database-driven internet servers. I will present
success stories for WebView Materialization, describe an adaptive
Online algorithm for WebView selection, and focus on the update
scheduling problem: determine the order to refresh WebViews so that
the overall QoD is maximized.
Short Bio:
Alexandros Labrinidis is a PhD candidate at the Department of Computer
Science at the University of Maryland, College Park. He received a
Masters degree in Computer Science from the University of Maryland and
Bachelor and Masters degrees in Computer Science from the University
of Crete, Greece. His current research interests include Databases and
the Web, Quality of Service, Quality of Data, and Data Warehousing.
For more information, please visit http://www.labrinidis.org
*The talk will be followed by refreshments in Ryerson 255*
Persons with disabilities who may need assistance should call 773.834.8977
If you would like to meet with the speaker, please send e-mail to
marge at cs.uchicago.edu
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