Bayesian network, and probabilistic ontology driven trust model for SLA management of Cloud services

Obed Jules, Abdelhakim Hafid, Mohamed Adel Serhani

Research output: Chapter in Book/Report/Conference proceedingConference contribution

20 Citations (Scopus)

Abstract

To provide on-demand Cloud services, Cloud providers and customers are used to sign Service Level Agreement (SLA), which is an agreement on the level of service provided and its associated cost. Unfortunately, SLA is not as dynamic as the Cloud and the criteria on which a customer relies to select a provider can be of problematic nature. The provider must optimize its resources although he cannot predict the customer behavior that can make varying requests. This can have a direct impact on the availability of resources and thus may lead to SLA violations. To cope with this issue, we propose a framework that allows the customer to choose a trusted provider based on its reputation calculated using a Bayesian network and continuously updated via a Cloud directory. Moreover, we propose a smart and dynamic SLA scheme that uses a probabilistic ontology capable of detecting potential violations of contract parameters; in addition, it alerts the service provider about these violations. To evaluate our model we used data extracted from Amazon Web Service Elastic Cloud Compute and Google Compute Engine SLAs to simulate our proposal's environment. The results of our experiments show the effectiveness of probabilistic ontology for predicting SLA violation throughout some SLA parameters applied in Cloud environment.

Original languageEnglish
Title of host publication2014 IEEE 3rd International Conference on Cloud Networking, CloudNet 2014
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages77-83
Number of pages7
ISBN (Electronic)9781479927302
DOIs
Publication statusPublished - Nov 26 2014
Event2014 3rd IEEE International Conference on Cloud Networking, CloudNet 2014 - Luxembourg, Luxembourg
Duration: Oct 8 2014Oct 10 2014

Publication series

Name2014 IEEE 3rd International Conference on Cloud Networking, CloudNet 2014

Other

Other2014 3rd IEEE International Conference on Cloud Networking, CloudNet 2014
Country/TerritoryLuxembourg
CityLuxembourg
Period10/8/1410/10/14

Keywords

  • Bayesian networks
  • Cloud
  • Cloud Service Level Agreement
  • QoS
  • SLO
  • Trust
  • probabilistic Ontology

ASJC Scopus subject areas

  • Software
  • Computer Networks and Communications

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