SLA BASED SERVICE BROKERING IN INTERCLOUD ENVIRONMENTS
Foued Jrad, Jie Tao, Achim Streit · 2012
The fast emerging Cloud computing market over the last years resulted in a variety of heterogeneous and less interoperable Cloud infrastructures.This leads to a challenging and urgent problem for Cloud users when selecting their best fitting Cloud provider and hence it ties them to a particular provider.A new growing research paradigm, which envisions a network of interconnected and interoperable Clouds through the use of open standards, is Intercloud computing.This allows users to easily migrate their application workloads across Clouds regardless of the underlying used Cloud provider platform.A very promising future use case of Intercloud computing is Cloud services brokerage.In this paper, we propose a generic architecture for a Cloud service broker operating in an Intercloud environment by using the latest Cloud standards.The broker aims to find the most suitable Cloud provider while satisfying the users' service requirements in terms of functional and non-functional Service Level Agreement parameters.After discussing the broker value-added services, we present in detail the broker design.We focus especially on how the expected SLA management and resource interoperability functionalities are included in the broker.Finally, we present a realistic simulation testbed to validate and evaluate the proposed architecture.