In partial fulfillment of the Requirements for the Degree of
Master of Science
Zhubin Zhang
will defend his thesis
Adaptive Proxy Caching for Web Servers
in Soft Real-Time
Applications
Abstract
An adaptive cache proxy is developed to improve the performance of web access
in soft real-time applications. It consists of client proxies and cooperative
proxy servers with a server-side pushing schema. The large amount of
heterogeneous data will be stored in the proxy server and delivered to clients
through computer networks to reduce the response time and network traffic. The
adaptive proxy pre-fetches and replaces heterogeneous data dynamically in
consideration of network cost, data size, data change rate, data coherency,
etc. Simulation of this adaptive cache proxy is implemented to investigate its
efficiency and data coherency using adaptive strategies.
The simulation results show that the modified LUV algorithm has better performance in terms of hit rate, byte hit rate, and delay saving rate. With the cooperative proxy caching, it is shown that the performance of proxy caching is more predictable if proxies need to deal with a variety of data. The modified adaptive TTL algorithm has better performance in terms of the combination of temporal coherency and system overheads.
Date: Thursday, December 5, 2002
Time: 5:00 PM
Place: 550-PGH
Faculty, students, and the general public are invited.
Thesis Advisor: Dr. Albert Cheng