Stabilising Performance in Cloud Services Composition Using Portfolio Theory

Faisal Alrebeish, Rami Bahsoon

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

1 Citation (Scopus)


The increasing number of services available in the cloud market make them plausible and attractive for building Cloud Service Compositions (CSC). However, performance instability is common in the cloud environment due to changes in supply and demand of shared computational infrastructure and resources. Candidate compositions are vulnerable to such instability. We propose a novel approach to improve performance stability by leveraging on the principles of design diversity in service composition(s). The approach uses portfolio theory to construct a diversified composition of candidate services that share lowest possible correlation for their performances. We use an exemplar to illustrate the applicability of the approach. Controlled experiments are used to test the approach effectiveness in improving the performance stability of CSC. While the scalability of our approach is evaluated, we report on its sensitivity and effectiveness under multiple correlation settings.
Original languageEnglish
Title of host publicationProceedings 2015 IEEE International Conference on Web Services (ICWS)
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Number of pages8
ISBN (Print)9781467372718
Publication statusPublished - 17 Aug 2015
Event2015 IEEE International Conference on Web Services (ICWS) - New York, United States
Duration: 27 Jun 20152 Jul 2015


Conference2015 IEEE International Conference on Web Services (ICWS)
Country/TerritoryUnited States
CityNew York


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