IEEE Transactions on Computers
Schemes for fault identification in communication networks
IEEE/ACM Transactions on Networking (TON)
Analysing software requirements specifications for performance
WOSP '02 Proceedings of the 3rd international workshop on Software and performance
Classification and Computation of Dependencies for Distributed Management
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Multicriteria Optimization
Towards highly reliable enterprise network services via inference of multi-level dependencies
Proceedings of the 2007 conference on Applications, technologies, architectures, and protocols for computer communications
Negotiation of Service Level Agreements: An Architecture and a Search-Based Approach
ICSOC '07 Proceedings of the 5th international conference on Service-Oriented Computing
Product-based workflow design for monitoring of collaborative business processes
CAiSE'11 Proceedings of the 23rd international conference on Advanced information systems engineering
Business driven BCM SLA translation for service oriented systems
MMB'12/DFT'12 Proceedings of the 16th international GI/ITG conference on Measurement, Modelling, and Evaluation of Computing Systems and Dependability and Fault Tolerance
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A Service Level Agreement (SLA) is the electronic equivalent of a real-life contract, which describes expectations from a service and governs its consumption. Ideally, a SLA provides certainty as regards customer experience and Quality of Service (QoS) received. For self-contained, isolated services this type of certainty is relatively straightforward to achieve. However, for services that are composed by others, or that rely on others to execute, such functional dependencies imply similar non-functional ones. Therefore, SLAs offered by a service to its customers are in turn depending on other SLAs, which the same service establishes in its role as a customer of the services it relies upon. In this paper we explore this dependency between different SLAs, and formalize the problem of converting an agreement for a composed service into individual agreements for the services from which it is composed.