[Staff] [Faculty] [Colloquium] Yanlei Diao Today 3/7/05

[Nita Yack]

COMPUTER SCIENCE
The University of Chicago
TALK



Monday, March 7, 2005
2:30 p.m.
Ryerson 251

Yanlei Diao
University of California - Berkeley
http://www.cs.berkeley.edu/~diaoyl/

Title: Query Processing for Large-Scale XML Message Brokering

Abstract: Emerging distributed information systems such as Web 
services, personalized content delivery, and event monitoring require 
increasingly flexible and adaptive infrastructures. Recently, the 
publish/subscribe model has gained acceptance as a solution for the 
loose coupling of systems at the communication level. Meanwhile, at the 
content level, XML (Extensible Markup Language) is becoming a de facto 
standard for online data exchange. I propose an approach that 
integrates publish/subscribe and XML and, in particular, exploits 
declarative XML queries to offer high flexibility and functionality in 
distributed systems. This approach is based on building XML message 
brokers, which I define as middleware components that perform three 
main functions: filtering, transformation, and routing of XML messages 
based on client-specified queries.

In this talk, I present YFilter, an XML message brokering system, that 
provides the three functions for large numbers of queries on high 
volumes of messages. The key innovation has been to identify 
commonalities among queries and share their processing. I will 
summarize YFilter’s shared filtering techniques, focus on its shared 
transformation techniques, and present an overview of its third 
component on routing. I will also report on the results of a thorough 
performance study, showing that YFilter can provide efficient message 
processing for tens of thousands of queries while preserving the 
flexibility to support a wide variety of message types and query 
workloads.



Host:  Gina-Anne Levow
*The talk will be followed by refreshments in Ryerson 255*
Persons who need assistance should call 773-702-6614
Nita Yack
Departmental Administrator
Computer Science Department
1100 E. 58th Street - Room 151
Chicago, IL 60637
(773) 702-6019
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