Sharaf, S and Djemame, K (2014) Enabling service-level agreement renegotiation through extending WS-Agreement specification. Service Oriented Computing and Applications, 9 (2). 177 - 191. ISSN 1863-2386
Abstract
WS-Agreement is a language and protocol designed for creating service-level agreements (SLAs) based on initial offers, and for monitoring those offers at runtime. The definition of WS-Agreement protocol is very general and does not contemplate the possibility of changing an agreement at runtime. This paper presents extensions of the WS-Agreement specification to support the dynamic nature of SLAs by allowing the possibility of SLA renegotiation at runtime. The extended WS-Agreement specification has been implemented and tested. Within this implementation, the concept of renegotiation is demonstrated through the ability to create more than one SLA at runtime. An evaluation is conducted to examine the profits a service provider may gain through renegotiation, as well the savings resulting from rescuing the SLA from violations as a consequence of avoiding paying penalties. The results show that making the SLA terms adaptable and changeable is a viable mechanism that provides flexibility to the service provider and service consumer.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2014, Springer-Verlag London. This is an author produced version of a paper published in Service Oriented Computing and Applications. Uploaded in accordance with the publisher's self-archiving policy. The final publication is available at Springer via http://dx.doi.org/10.1007/s11761-014-0159-5 |
Keywords: | Dynamic service-level agreement (SLA); Fuzzy systems; Quality of service; Renegotiation; WS-Agreement |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Computing (Leeds) > Institute for Computational and Systems Science (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 12 Aug 2015 15:35 |
Last Modified: | 18 Jan 2018 06:50 |
Published Version: | http://dx.doi.org/10.1007/s11761-014-0159-5 |
Status: | Published |
Publisher: | Springer Verlag |
Identification Number: | 10.1007/s11761-014-0159-5 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:85683 |