Cloud Computing - Resource Allocation and Scheduling Issues

Dr. Helen Karatza
Professor Emeritus
Department of Informatics
Aristotle University of Thessaloniki, Greece

Chaired by
Dr TAN Soon Huat, Gary, Associate Professor, School of Computing

  11 Apr 2018 Wednesday, 10:30 AM to 12:00 PM

 Executive Classroom, COM2-04-02


Cloud computing has been continuously growing, offering computational services to many scientists, consumers and enterprises as utilities, on a pay-per-use approach.

Clouds performance became very important due to the increase of users and applications. Effective management of cloud resources is crucial to use effectively the power of these systems and achieve good performance. The scheduling algorithms must seek a way to maintain a good response time to leasing cost ratio.

There are important issues that must be addressed for cloud systems, such as: performance, resource allocation, efficient scheduling, energy conservation, reliability, cost, availability, quality. Complex multiple-task applications may have precedence constraints and specific deadlines and may impose several restrictions and QoS requirements. Therefore energy-efficient job scheduling is a difficult task in clouds where there are many alternative heterogeneous computers. Advanced modeling and simulation techniques are a basic aspect of performance evaluation that is needed before the costly prototyping actions required for complex distributed systems such as clouds.

In this talk we will present state-of-the-art research covering a variety of concepts on resource allocation and job scheduling in cloud systems. Complex workloads will be examined including real-time jobs and scientific workflows, and performance metrics will be presented. Future directions in the area of cloud performance will be also provided.


Helen Karatza is a Professor Emeritus in the Department of Informatics at the Aristotle University of Thessaloniki, Greece, where she teaches courses in the postgraduate and undergraduate level, and supervises doctoral and postdoctoral research. Dr. Karatza's research interests include Computer Systems Modeling and Simulation, Performance Evaluation, Grid and Cloud Computing, Energy Efficiency in Large Scale Distributed Systems, Resource Allocation and Scheduling and Real-time Distributed Systems.

Dr. Karatza has authored or co-authored over 210 technical papers and book chapters including four papers that earned best paper awards at international conferences. She is a senior member of IEEE, ACM and SCS, and she served as an elected member of the Board of Directors at Large of the Society for Modeling and Simulation International. She served as Chair and Keynote Speaker in International Conferences.

Dr. Karatza is the Editor-in-Chief of the Elsevier Journal "Simulation Modeling Practice and Theory" and Senior Associate Editor of the "Journal of Systems and Software" of Elsevier. She was Editor-in-Chief of "Simulation Transactions of The Society for Modeling and Simulation International" and Associate Editor of "ACM Transactions on Modeling and Computer Simulation". She served as Guest Editor of Special Issues in International Journals.

Her publications list is provided in: http://agent.csd.auth.gr/~karatza/Publications-List.pdf