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A. Kertesz, G. Kecskemeti, I. Brandic:
"An interoperable and self-adaptive approach for SLA-based service virtualization in heterogeneous Cloud environments";
Future Generation Computer Systems, Volume 32 (2014), 54 - 68.

Cloud computing is a newly emerged computing infrastructure that builds on the latest achievements of diverse research areas, such as Grid computing, Service-oriented computing, business process
management and virtualization. An important characteristic of Cloud-based services is the provision of non-functional guarantees in the form of Service Level Agreements (SLAs), such as guarantees on
execution time or price. However, due to system malfunctions, changing workload conditions, hard- and software failures, established SLAs can be violated. In order to avoid costly SLA violations, flexible and adaptive SLA attainment strategies are needed. In this paper we present a self-manageable architecture
for SLA-based service virtualization that provides a way to ease interoperable service executions in a diverse, heterogeneous, distributed and virtualized world of services. We demonstrate in this paper that the combination of negotiation, brokering and deployment using SLA-aware extensions and autonomic computing principles are required for achieving reliable and efficient service operation in distributed environments.

Cloud computing, Service virtualization, SLA negotiation, Service brokering, On-demand deployment, Self-management

http://dx.doi.org/10.1016/j.future.2012.05.016