Seminario: Performance of Large Scale Distributed Systems – Issues, Trends, Problems and Solutions
Data: Venerdì 21 aprile 2017 ore 10:30
Luogo: Sala del Consiglio DIMES – 5° Piano Cubo 42C – UNICAL

Speaker: Prof. Eleni Karatza

Department of Informatics, Aristotle University of Thessaloniki, Greece.

Recent advances in networks and computers have led many aspects of our daily life to depend on distributed interconnected computing resources. Large scale distributed systems such as grids and clouds are used for serving large and complex applications. Grids and clouds performance became more important due to the increase of users and applications. Effective management of distributed resources is crucial to use effectively the power of these systems and achieve high system performance.

However, there are important issues that must be addressed for large scale distributed systems, such as: performance, resource allocation, efficient scheduling, energy conservation, reliability, cost, availability, quality. Furthermore, due to the cost of electrical power consumption and the environmental impact, energy efficiency in large scale systems is a global IT concern. 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 grids and clouds where there are many alternative heterogeneous computers.

In this talk we will present state-of-the-art research covering a variety of concepts on resource allocation and job scheduling in large scale existing or simulated distributed systems that provide insight into problems solving. Advanced modelling and simulation techniques are a basic aspect of performance evaluation that is needed before the costly prototyping actions required for complex distributed systems. Queuing network models of large scale distributed systems will be described and analysed and performance metrics will be presented. Complex workloads will be examined including real time jobs and scientific workflows. We will also provide future directions in the area of grids and clouds.

Bio: Eleni Karatza is a Professor in the Department of Informatics at the Aristotle University of Thessaloniki, Greece. 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. She is senior member of SCS, IEEE and ACM, and she served as an elected member of the Board of Directors at Large of the Society for Modeling and Simulation International (2009-2011).

Professor Karatza is the Editor-in-Chief of the Elsevier Journal “Simulation Modeling Practice and Theory”, Associate Editor of the “Journal of Systems and Software” of Elsevier, and she has been Guest Editor of Special Issues in multiple International Journals.


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