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2012 IEEE 26th International Parallel and Distributed Processing Symposium Workshops & PhD Forum (2012)
Shanghai, China China
May 21, 2012 to May 25, 2012
ISBN: 978-1-4673-0974-5
pp: 1067-1074
In this paper, we address scheduling problems for infrastructure as a service (IaaS). In a typical IaaS scenario, an infrastructure provider offers his resources on demand and with different service levels to his customers. These service levels are mainly distinguished by the amount of computing power a customer is guaranteed to receive within a time frame. In our a model, each service level is described by a slack factor and a price for a processing time unit. If the provider accepts a job it is guaranteed to complete by its deadline, that is its submission time plus its processing time times the slack factor of assigned service level. After a job has been submitted, the provider must decide immediately and irrevocably whether he accepts or rejects the job. We suggest various algorithms and use competitive analysis to discuss different scenarios for this model. These scenarios combine fixed services levels with the single machine model or the parallel identical machines model. Particularly, we demonstrate the benefit of parallelism by showing that we can achieve better competitive factor in a parallel machine scenario than in the corresponding single machine scenario.
Silicon, Scheduling, Processor scheduling, Real time systems, Upper bound, Computational modeling, Schedules, slack factor, online scheduling, competitive factors, service levels, cloud computing

U. Schwiegelshohn and A. Tchernykh, "Online Scheduling for Cloud Computing and Different Service Levels," 2012 IEEE 26th International Parallel and Distributed Processing Symposium Workshops & PhD Forum(IPDPSW), Shanghai, China China, 2012, pp. 1067-1074.
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