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Speaker:        Qiong Luo
                University of Wisconsin-Madison

Topic:          "Caching for Web-Based Database Applications"

Date:           Monday, 4 March 2002

Time:           4:00pm - 5:00pm

Venue:          Lecture Theater F
                (Leung Yat Sing Lecture Theater, near lift nos. 25/26)
                HKUST


ABSTRACT:

While web caching proxy servers are essential for improving the
performance and scalability of general web sites, their current
implementations, which only cache static web objects, are insufficient for
the web sites that are backed with database servers. To address this
problem, we explore how to add a query processing capability to proxy
servers so that they can efficiently provide caching for these web sites.

I will mainly talk about our form-based proxy caching framework. A key
observation in this work is that HTML form-based interfaces, which are
commonly provided by database-backed web sites, enable a useful variety of
query caching techniques that would be impractical or impossible for
arbitrary SQL queries. We have identified a common class of web queries,
which we term Top-N Conjunctive Keyword Queries, and studied form-based
active caching techniques for them. If time permits, I will briefly
describe my early work on active query caching in an existing research
prototype proxy as well as my most recent work on table level caching in
application servers using a commercial DBMS (DB2).



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Biography:

Qiong (Joan) Luo is a Ph.D. candidate in Computer Sciences at University
of Wisconsin-Madison, working in the database area under the guidance of
Prof. Jeff Naughton. Her dissertation research has focussed on advanced
proxy caching techniques for improving the performance and scalability of
web-based database applications.  As part of her thesis work, Qiong
participated in the DBCache Project led by Dr. C. Mohan at IBM Almaden
Research Center in the Fall of 2001. Qiong expects to earn her Ph.D. in
May 2002.


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