SLAng: A Language for Defining Service Level Agreements

  • Authors:
  • D. Davide Lamanna;James Skene;Wolfgang Emmerich

  • Affiliations:
  • -;-;-

  • Venue:
  • FTDCS '03 Proceedings of the The Ninth IEEE Workshop on Future Trends of Distributed Computing Systems
  • Year:
  • 2003

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Abstract

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 specification to support the processing of images across multiple domains and we evaluate our language based on it.