Off-campus WSU users: To download campus access dissertations, please use the following link to log into our proxy server with your WSU access ID and password, then click the "Off-campus Download" button below.

Non-WSU users: Please talk to your librarian about requesting this thesis through interlibrary loan.

Access Type

WSU Access

Date of Award

January 2010

Degree Type


Degree Name



Electrical and Computer Engineering

First Advisor

Cheng-Zhong Xu


Web and e-commerce applications have become popular and are increasingly dominating the internet usage today. They frequently experience service degradation due to high volume of traffic originating from the customers. It is important to balance the available system resources to provide satisfactory quality of services without having an adverse effect on the system due to system overloading. Prior work in this area has looked at the admission control mechanism as a means to alleviate this problem. In our approach we develop a real-time autonomous multi-tier admission control (aMAC) that includes a controller which uses operating system performance metrics to detect and trigger overload condition and accept or reject requests coming to the web site. aMAC was tested in a distributed virtualized multi-tier e-commerce environment running industry standard benchmarks. Experimental results indicate that the system is able to maintain optimal performance while avoiding overload conditions.

Off-campus Download