Software as a Service (SaaS) provides access to applications to end users over the Internet without upfront investment in infrastructure and software. To serve their customers, SaaS providers utilise resources of internal data centres or rent resources from a public Infrastructure as a Service (IaaS) provider. In-house hosting can increase administration and maintenance costs whereas renting from an IaaS provider can impact the service quality due to its variable performance. To overcome these limitations, we propose innovative admission control and scheduling algorithms for SaaS providers to effectively utilise public Cloud resources to maximize profit by minimizing cost and improving customer satisfaction level. Furthermore, we conduct an extensive evaluation study to analyse which solution suits best in which scenario to maximize SaaS providerʼs profit. Simulation results show that our proposed algorithms provide substantial improvement (up to 40% cost saving) over reference ones across all ranges of variation in QoS parameters.

Item Type:	Refereed Article
Keywords:	cloud computing, Service Level Agreement (SLA), admission control, Software as a Service, scalability of application services
Research Division:	Information and Computing Sciences
Research Group:	Distributed Computing
Research Field:	Distributed and Grid Systems
Objective Division:	Information and Communication Services
Objective Group:	Computer Software and Services
Objective Field:	Computer Time Leasing, Sharing and Renting Services
Author:	Garg, SK (Dr Saurabh Garg)
ID Code:	93837
Year Published:	2012
Web of Science® Times Cited:	78
Deposited By:	Information and Communication Technology
Deposited On:	2014-08-19
Last Modified:	2014-12-08
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