I joined the Laboratory for Advanced Systems Software in the Fall of 2005 to work with my advisor, Prashant Shenoy. I have also collaborated with Arun Venkataramani, David Jensen, Mark Corner, and Emery Burger while at UMASS.

I am working on the VirtX (Virtualization Technologies) project, and am particularly interested in how new virtualization technologies like Xen and VMware can allow for better performance, reliability, and security in modern data centers. My work thus far has covered topics such as:

• Reliability: Using virtualization for cheaper fault tolerant data centers
• Performance: Automatically balancing load using virtual machine migration
• Energy Costs: Consolidating servers by exploiting sharable memory between virtual machines
• Performance Modeling: Predicting the performance of complex, multi-tier data center applications
• Capacity Planning: Modeling the overheads incurred by the virtualization layer for different types of applications

I help maintain the UMass Trace Repository which collects application and resource traces and releases them for use by researchers worldwide.

I spent the summer of 2007 at HP Labs, working with Lucy Cherkasova on models of virtualized applications.

In May 2008 I passed my PhD Candidacy Exam with distinction. I am one of seventeen students to receive the "with distinction" award since 1995.

I have worked on the following publications while at UMASS.

Profiling and Modeling Resource Usage of Virtualized Applications
Timothy Wood, Ludmila Cherkasova, Kivan Ozonat, and Prashant Shenoy. To appear: Middleware 2008.

ZZ: Cheap Practical BFT Using Virtualization
Timothy Wood, Rahul Singh, Arun Venkataramani, and Prashant Shenoy. University of Massachusetts Technical Report TR14-08, 2008.

Memory Buddies: Exploiting Page Sharing for Server Consolidation in Virtualized Data Centers
Timothy Wood, Gabriel Tarasuk-Levin, Jim Cipar, Peter Desnoyers, Prashant Shenoy, Mark Corner and Emery Berger. University of Massachusetts Technical Report TR36-07, 2007.

Modellus: Automated Modeling of Complex Data Center Applications
Peter Desnoyers, Timothy Wood, Prashant Shenoy, Sangameshwar Patil, Harrick Vin. University of Massachusetts Technical Report TR31-07, 2007.

Black-box and Gray-box Strategies for Virtual Machine Migration
Timothy Wood, Prashant Shenoy, Arun Venkataramani, and Mazin Yousif. Proceedings of the Fourth Symposium on Networked Systems Design and Implementation (NSDI), Cambridge, MA, April 2007.

Efficient Data Migration in Self-managing Storage Systems
Vijay Sundaram, Tim Wood, and Prashant Shenoy. Proceedings of the Third International Conference on Autonomic Computing, Dublin, Ireland, June 2006.

As an undergraduate at Rutgers University in the ECE Department I had the following publications with my advisor, Dr. Yanyong Zhang.

Channel Surfing and Spatial Retreats: Defenses against Wireless Denial of Service
W. Xu, T. Wood, W. Trappe, Y. Zhang. ACM Workshop on Wireless Security, MobiCom, Philadelphia, PA, Fall 2004 .

The Feasibility of Launching and Detecting Jamming Attacks in Wireless Networks
W. Xu, W. Trappe, Y. Zhang, T. Wood. ACM MobiHoc, Urbana-Champaign, IL, May 2005.

Here are some of the posters and talks I've given since joining UMass.

Profiling and Modeling Resource Utilization of Virtualized Applications
Timothy Wood, Ludmila Cherkasova, Kivanc Ozonat, and Prashant Shenoy. Xen Summit 2008, Boston, June 2008. Presentation

Exploiting Sharing for Server Consolidation
Timothy Wood, Gabriel Tarasuk-Levin, James Cipar, Peter Desnoyers, Prashant Shenoy, Mark Corner, Emery Berger. VMworld 2007, San Francisco, Sept 2007. Poster

Black-box and Gray-box Strategies for Virtual Machine Migration
The slides from my NSDI 2007 talk are available here.

Other sites I work on in the off chance that I have spare time.

tim-wood.net
zFacts.com