Timothy Wood - home

Tim Wood
Timothy W. Wood
Assistant Professor
timwood@gwu.edu
SEH Room 4580
(202) 994-1918 (office)
CV

I'm on: Google Scholar View Timothy Wood's LinkedIn profile

I am a computer science Assistant Professor at The George Washington University and one of the directors of the Cloud Systems Lab. I teach and do research in the general areas of operating systems and distributed systems. I am particularly interested in how new virtualization technologies can provide application agnostic tools that improve performance, efficiency, and reliability in cloud computing data centers and software-based networks. My research focuses on practical, systems-level challenges created by emerging technologies in these areas.

Prior to joining GW I was a Ph.D. student at the University of Massachusetts Amherst working with Prashant Shenoy. Before that I was an ECE undergraduate at Rutgers University and did research with Yanyong Zhang in the WINLAB.

I primarily work in the fields of operating systems and networking; my current projects include:

Software Defined Network Function Virtualization: We are designing the software infrastructures and management algorithms needed to transition network services like routers, firewalls, and intrusion detection systems from running on hardware to more flexible, software-based environments. The basis for our research is OpenNetVM (NSDI 14, HotMiddlebox 16), a high performance NFV platform that we have released as open source to the research community. Through careful optimizations at the systems-level, OpenNetVM can achieve packet processing rates of nearly 70Gbps, while retaining a flexible, SDN-controlled design. We have recently demonstrated the power of this platform with a self-managing, high speed load balancer for memcached clusters (ICAC 16 Best Paper). This work is supported in part by NSF CNS-1422362. More info here!

Efficient, Flexible, and Dependable Clouds: Modern data centers rely on virtualization to partition servers into isolated components. My early work on "black-box" and "gray-box" virtual machine management (NSDI 07) sought to evaluate the benefits and drawbacks of sending information across the virutalization abstraction layer for resource management. Since then we've explored how carefully puncturing the virtualization abstraction layer can be used to dynamically manage memory (VEE 09 Best Paper, Usenix ATC 12, VEE 14), storage (SC 15, IC2E 16) and CPU (IWQoS 12 Best Paper, CCGrid 14). We've also investigated the challenges with defending cloud services from both natural disasters (SoCC 11) and malicious attacks (EuroSys 11, HotCloud 16). This work is supported in part by NSF CNS-1525992, an NSF CAREER Award, the Comcast Technology Research and Development Fund, and a Google Faculty Award.

My full publication list is available below, or on Google Scholar. Here is a short bio.

News

A condensed timeline of events:

  • 7/11/2016: Our ICAC 16 paper on using NFV to speed up Memcached load balancing by nearly 100X has been selected as a Best Paper Candidate! UPDATE: We won the inaugural Karsten Schwan Best Paper Award!
  • 6/20/2016: My student Sundaresan Rajasekaran will be presenting our paper on Scalable Cloud Security at HotCloud 16. I've been invited to speak at the Cloud Control Workshop organized by Umeå University.
  • 5/25/2016: This summer my students Grace Liu will intern at Hewlett Packard Labs and Wei Zhang will intern at AT&T Labs Research.
  • 12/7/2015: I gave the keynote at the Virtualization Technologies workshop colocated with Middleware 2015. The talk discussed how carefully puncturing abstraction layers can be beneficial both in server virtualization and network function virtualization.
  • 11/15/2015: Our paper on collaboration between the hypervisor and virtual machines to optimize I/O has been published at Super Computing 2015.
  • 9/1/2015: I have received a grant from NSF's Secure and Trustworthy Cyberspace division. The project, titled EVADE: Evidence Assisted Detection and Evasion of Security Vulnerabilities is a joint effort with Emery Berger from the University of Massachusetts Amherst and will explore operating system and virtualization layer techniques to efficiently detect attacks before they are able to adversely affect a system.
  • 8/30/2015: Together with Howie Huang from GW's ECE department, I have received a Comcast Technology Research and Development Fund award for our project on "Automated Management of Flexible Resource Pools in Cloud Data Centers".
  • 2/12/2015: I just returned from the Dagstuhl Seminar on Distributed Cloud Computing. Very interesting!
  • 12/3/2014: Congrats to my Ph.D. student Grace Liu for winning the HP Women of Openstack Scholarship!
  • 9/12/2014: My NSF grant Software Defined Network Function Virtualization (SDNFV) - Flexible, High Performance Network and Data Center Virtualization has been approved. This work will be a collaboration with KK Ramakrishnan from UC Riverside.
  • 3/19/2014: I received the GW SEAS Outstanding Teacher Award for Assistant Professors.
  • 2/20/2014: I have been awarded a Google Faculty Research Award to fund a collaboration with Haris Gavranovic of the International University of Sarajevo on optimizing the placement of applications in distributed data centers.
  • 1/5/2014: Our paper NetVM: High Performance and Flexible Networking Using Virtualization on Commodity Platforms has been accepted at NSDI 2014!
  • 11/12/2013: My first Ph.D. student, Jinho Hwang has defended his thesis! Jinho will be starting a Post Doc at IBM Research TJ Watson next month.
  • 1/14/2013: My NSF Career Award: Application-Agnostic, Distributed-Aware Cloud Platforms has been funded!
  • 6/5/2012: Jinho presented our paper at IWQoS and won a Best Student Paper award!
  • 10/24/2011: My PhD dissertation has been selected for an Outstanding Dissertation Award by the UMass Computer Science department (sponsored by Yahoo). It was also nominated for the ACM's Doctoral Dissertation Award.
  • 8/1/2011: I began as an assistant professor at George Washington University after finishing my Ph.D. at University of Massachusetts Amherst.

Full News Timeline

Teaching

In Fall 2015-Spring 2016 I will teach CSCI 6421 Distributed Systems and CSci 4243/4244 Senior Design.

The full list of courses I have taught is available here.

I'm proud to have been selected as the GW ACM Professor of the Year Award in 2015, recipient of the GW SEAS Outstanding Teacher Award for an Assistant Professor in 2014, and the GW Engineer’s Council CS Professor of the Year in 2013.

Publications

Google Scholar reports that my papers have been cited over 4000 times, with an h-index of 21.

Click to expand publication list

This list is also available as bibtex entries.

MS Advising

If I am listed as your MS advisor, I can help you plan your degree. However, before sending me email you should check this MS Advising FAQ. It will answer the vast majority of your questions.

Service

I have been or will be a member of the program committee for the following conferences:

Past service

I have acted as an external reviewer for a number of conferences and journals including:

  • NSDI, HotCloud, SenSys, Usenix ATC, EuroSys, IEEE TPDS, IEEE TCC, IEEE TC, IEEE TAAS, IEEE TNSM, IEEE TR, IEEE/ACM ToN, ACM Computing Surveys, Elsevier JPDC, VLDB Journal, and Sigops Operating Systems Review

I also run an outreach program to local high schools that teaches students how the popular websites they use are actually built. Contact me if you are interested in this program.

Brain Dump

Perhaps these will be useful for others as well…

If you are currently a student at GW or are applying to the Ph.D. program, contact me if you are interested in working on distributed systems or cloud computing problems. You can read more about what I expect from potential graduate students here.

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