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I. Breskovic, M. Maurer, V. Emeakaroha, I. Brandic, S. Dustdar:
"Cost-Efficient Utilization of Public SLA Templates in Autonomic Cloud Markets";
Talk: Fourth IEEE International Conference on Utility and Cloud Computing, UCC 2011, Melbourne, Victoria, Australia; 2011-12-05 - 2011-12-07; in: "Proceedings of the 2011 Fourth IEEE International Conference on Utility and Cloud Computing, UCC 2011", R. Buyya, S. Pallickara, G. Fox (ed.); IEEE Computer Society, (2011), ISBN: 978-0-7695-4592-9; 229 - 236.

Dynamic and self-adaptable markets are fundamental for the successful implementation of the Cloud computing paradigm where computing resources are provided on demand and dynamically to the heterogeneous user base. Usually, in Cloud markets, contracts between traders are established using Service Level Agreements (SLAs), which include objectives of service usage. However, Cloud markets face challenges,
which are usually not evident in other market types, such as
non-standardized goods and large variety of resource types
offered on the market, resulting in low number of matches
of consumers´ bids and providers´ asks. Moreover, existing
Cloud market mechanisms are usually static and cannot react
on dynamic change of user requirements. To counteract these
problems, we propose an adaptive approach for autonomically
deriving public SLA templates (i.e., templates for generation
of electronic contracts) based on user requirements. Although
this approach brings many benefits, it also incurs cost to users,
since they must adapt specifications of their requirements in
order to match automatically generated public SLA templates.
In this paper, we reduce this cost by autonomically modifying
specifications of user requirements. We introduce a method for
adapting public SLA templates not only in respect to definitions
of SLA attributes, but also to attribute values. Based on an
appropriate utility and cost model, we evaluate the approach
and show that it significantly improves the performance of the
adaptive SLA template technique.

Service Level Agreement; SLA management; SLA mapping; Cloud economics; electronic markets

http://dx.doi.org/10.1109/UCC.2011.38

Project Head Ivona Brandic:
Foundations of Self-governing ICT Infrastructures