SLAng: A Language for Defining Service Level Agreements

D. Lamanna, J. Skene and W. Emmerich

Dept. of Computer Science,
University College London
Dept. of Computer Science
Gower Street, London, WC1E 6BT UK

Application or web services are increasingly being used across organisational boundaries. Moreover, new services are being introduced at the network and storage level. Languages to specify interfaces for such services have been researched and transferred into industrial practice. We investigate end-to-end quality of service (QoS) and highlight that QoS provision has multiple facets and requires complex agreements between network services, storage services and middleware services. We introduce SLAng, a language for defining Service Level Agreements (SLAs) that accommodates these needs. We illustrate how SLAng is used to specify QoS in a case study that uses a web services speci- fication to support the processing of images across multiple domains and we evaluate our language based on it.

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Updated on: 29/04/2003
Wolfgang Emmerich