Abstract

Cloud system is an emerging paradigm and a large pool of computing resources that makes use of existing technologies such as virtualization, service-orientation and grid computing. In cloud computing, on demand services are delivered to users depending on the service level agreements (SLA) between the service provider and the user. In order to provide scalable business services and cost allocation flexibility for customers so that they can choose their preferred services according to their budget, defining a cost-effective query execution strategy within cloud environment is utmost important. Towards this effort, a cost model for query execution at cloud computing based on both shared-disk and shared-nothing architecture is introduced in this paper. The complexity of the cost model has been analyzed considering different cost factors that are demanding for cloud computing. Finally, the cost model is illustrated with the help of an example.