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Distinguished Professor Emeritus

Research interestsJohnny Wong

Professor Wong's research interests are in the areas of resource management in cloud computing and performance analysis of systems that support electric vehicles. Many organizations today are offering services over the Internet. Of interest is a scenario where an organization, referred to as a subscriber, acquires resources from an infrastructure provider to deploy its applications and pays for these resources on an as-needed basis. Such a strategy is attractive because the subscriber does not have to operate its own data center; it can also adjust the resource level as demand changes. From the subscriber’s perspective, it is desirable to acquire enough, but not an excessive amount of resources to provide an acceptable quality of service, which is measured by how well a given performance target is met. Queueing theoretic models are used to determine the resources required to meet a performance target based on response time. The accuracy of this model is evaluated using data obtained from running a web application on an experimental system. A PhD student, Ali Rajabi, is working on this topic under Professor Wong’s supervision.

Systems that support the operation of electric vehicles have received considerable attention in recent years. In collaboration with Professor S. Keshav and his PhD student Tommy Carpenter, solutions to the problem of sizing a pool of internal combustion vehicles that an electric vehicle dealer would like to offer its customers to use for long trips have been obtained. Another topic under investigation is performance analysis of charging strategies for electric vehicles.

Degrees and awards

BS, MS, PhD (California, Los Angeles)

Ross & Muriel Cheriton Faculty Fellowship, University of Waterloo (2005-2008); Faculty of Mathematics Fellow, University of Waterloo (2001-2004)

Industrial and sabbatical experience

Professor Wong has spent three sabbatical leaves at the IBM Zurich Research Laboratory (1981 to 1982, 1988 to 1989, and 1995 to 1996), working on token ring performance, gigabit per second local and metropolitan area networks, and Internet telephony, respectively. From 1996 to 2012, he was a visiting scientist at the IBM Toronto Laboratory Centre for Advanced Studies.

Representative publications

A. Rajabi and J.W. Wong. MMPP Characterization of Web Application Traffic. Proc. 20th International Symposium on Modeling, Analysis and Simulation of Computer and Telecommunication Systems, Washington DC, 2012.

T. Carpenter, S. Keshav and J.W. Wong. Sizing Finite Population Vehicle Pools. IEEE Transactions on Intelligent Transportation Systems, 15(3):1134-1144, 2014.

M. Litoiu, M. Woodside, J.W. Wong, J. Ng and G. Iszlai. A Business Driven Cloud Optimization Architecture. Proc. 25th ACM Symposium on Applied Computing, Sierre, Switzerland, 2010.

M. Kwok and J.W. Wong. Scalability Analysis of the Hierarchical Architecture for Distributed Virtual Environments. IEEE Transactions on Parallel and Distributed Systems, 19(3):408-417, 2008.

Affiliation: 
University of Waterloo
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