Steven M Hand

Steven Hand is a Senior Lecturer at the University of Cambridge 
Computer Laboratory (UK), where he is a leader of the Systems 
Research Group. He is also a co-founder and the chief architect of 
XenSource, a venture funded start-up created to commercially exploit 
the Xen Virtual Machine Monitor. XenSource was recently acquired by
Citrix Systems for US $500M. His interests lie in the areas of 
operating systems, algorithms, networking and distributed systems.

Steven received his BSc and MSc degrees from University College Dublin
in 1992 and 1993 respectively, the latter being undertaken concurrent
with a full-time position at Ericsson Research in Aachen, Germany. He
left Ericsson in 1994 to join the PhD program at the University of
Cambridge, and was awarded his PhD in 1998. He has been a Fellow at
Wolfson College Cambridge since 1998, and a faculty member at the
University of Cambridge Computer Laboratory since January 2000. He
currently advises 10 PhD students, and teaches both undergraduate- and
masters-level systems courses.

Steven was one of the people who designed and built Nemesis, a radically
different operating system designed from scratch to support continuous 
media applications. The design of Nemesis relied on the use of soft 
real-time scheduling techniques to provide "quality of service". These 
ideas strongly influenced the design of the XenoServer platform for 
globlal public computing, where similar techniques are used to guard 
against denial of service or other forms of resource abuse. 

Along with Ian Pratt, Steven was instrumental in initiating and shaping 
the XenoServer research programme. One key output of this research has 
been the Xen Virtual Machine Monitor, the world-leading open source 
solution for virtualization. Xen has been incorporated into most Linux
distributions, and is also available as a commercial offering from 
XenSource. Xen is in production use on tens of thousands of machines 
around the world, including Amazon EC2 and a number of grid sites. 

In addition to work within the XenoServer research area, Steven has
worked on inter-domain routing, peer-to-peer systems, network
architecture, hyperthreaded scheduling, and distributed search algorithms.

Selected publications
(see http://www.cl.cam.ac.uk/netos/papers for full list)


1. S.M. Hand 
   Self-Paging in the Nemesis Operating System
   Symposium on Operating Systems Design and Implementation (OSDI), Feb 1999

2. S.M. Hand, T. Harris, E. Kotsovinos and I.A. Pratt
   Controlling the XenoServer Open Platform
   IEEE Conference on Open Architectures and Network Programming, April 2003 

3. K.A. Fraser, I.A. Pratt, S.M. Hand, A.K. Warfield, 
   B. Dragovich, P.R. Barham, R. Neugebar
   Xen and the Art of Virtualization,
   Symposium of Operating Systems Principles (SOSP19), Oct 2004

4. C. Clark, K.A. Fraser, S.M Hand, J. Gorm Hansen, 
   E. Jul, C. Limpach, I.A. Pratt, A.K. Warfield
   Live Migration of Virtual Machines 
   Symposium on Networked Systems Design and Implementation (NSDI), May 2005

5. A. Ho, M. Fetterman, C. Clark, A.K. Warfield and S.M. Hand
   Practical Taint-based Protection using Demand Emulation
   European Conference on Computer Systems (EuroSys06), April 2006