Extending WSLA for Service and Contract Composition

Antonella Longo, Marco Zappatore, Mario Bochicchio

Abstract

Cloud Services (CSs) nowadays experience constantly improving successes in IT scenarios. Dynamic allocation of network, storage and computational resources, the hiding of visibility of internal IT components, as well as the pay-per-use paradigm are becoming more and more widespread ways to provide and consume services. The complexity of CSs is often due to service chains into which third-party services are aggregated in order to satisfy user requests. This confirms the need of modeling both contracts and corresponding Service Level Agreements (SLAs) referring to services provided to customers. Similarly, time-related variability issues in CSs require run-time performance monitoring and reporting solutions capable of comparing SLAs and feeding requesters with effective resource reservation and allocation policies. A detailed analysis in contracts and SLAs management has revealed a lack of expressivity in SLA specification and a consequent inadequacy in tools for describing and managing SLAs and contract composition. Therefore, we propose an extension of WSLA, a widely known SLA description language. We aim at modeling contracts and SLAs with additional details to support contract owners during service composition and its monitoring. The proposed approach has been adopted to develop and validate a tree-graph-based tool, to simplify SLA and contract composition.

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Paper Citation


in Harvard Style

Longo A., Zappatore M. and Bochicchio M. (2015). Extending WSLA for Service and Contract Composition . In Proceedings of the 17th International Conference on Enterprise Information Systems - Volume 3: ICEIS, ISBN 978-989-758-098-7, pages 307-315. DOI: 10.5220/0005401503070315


in Bibtex Style

@conference{iceis15,
author={Antonella Longo and Marco Zappatore and Mario Bochicchio},
title={Extending WSLA for Service and Contract Composition},
booktitle={Proceedings of the 17th International Conference on Enterprise Information Systems - Volume 3: ICEIS,},
year={2015},
pages={307-315},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0005401503070315},
isbn={978-989-758-098-7},
}


in EndNote Style

TY - CONF
JO - Proceedings of the 17th International Conference on Enterprise Information Systems - Volume 3: ICEIS,
TI - Extending WSLA for Service and Contract Composition
SN - 978-989-758-098-7
AU - Longo A.
AU - Zappatore M.
AU - Bochicchio M.
PY - 2015
SP - 307
EP - 315
DO - 10.5220/0005401503070315