Cloud services representation using SLA composition

SLA-aware Cloud platforms need mechanisms to represent, store and retrieve Cloud services. Usually services changes between different platforms, custom models are built to capture this information and ad-hoc implementations used to store and retrieve it. This paper propose a generic methodology for the representation of Cloud services. This methodology uses the WS-Agreement specification for capturing and manipulation arbitrary services using SLA fragments. SLA fragments are composed on the fly in response to user request. A SLA composition algorithm enables a prototype implementation of the methodology in a SLA-aware Cloud platform. This methodology provides the genericity, extensibility and flexibility to unify the modeling of Cloud services. Finally a use case provides a quantitative measure of the utility provided by the methodology from a Cloud user and Cloud provider point of view.This work has been developed under the support of the program Formacion de Personal Investigador de Caracter Predoctoral grant number BFPI/2009/103, from the Conselleria d'Educacio of the Generalitat Valenciana and the financial support received from the Ministerio de Economia y Competitividad for the project CodeCloud (TIN2010-17804).García García, A.; Blanquer Espert, I. (2015). Cloud services representation using SLA composition. Journal of Grid Computing. 13(1):35-51. https://doi.org/10.1007/s10723-014-9295-6S3551131Cloud computing use cases white paper. Technical report, The Open Cloud Manifesto. http://opencloudmanifesto.org/Cloud_Computing_Use_Cases_Whitepaper-2_0.pdfAron, R., Chana, I.: Formal qos policy based grid resource provisioning framework. J. 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