a Framework for Ranking of Cloud Computing Services Saurabh Kumar Garg, Steve Versteeg, Rajkumar Buyya Supervisor : Dr. Leyli Mohammadkhanli Presented By : SayedHassan Khatoonabadi Department of Computer Science
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a Framework for Ranking of Cloud Computing Services
Saurabh Kumar Garg, Steve Versteeg, Rajkumar Buyya
Supervisor : Dr. Leyli MohammadkhanliPresented By : SayedHassan Khatoonabadi
Department of Computer Science
a Framework for Ranking of Cloud Computing Services 2
Service Measurement IndexBased on ISO standards by CSIMC
Set of business-relevant KPIs AccountabilityAgilityCostPerformanceAssuranceSecurity and PrivacyUsability
a Framework for Ranking of Cloud Computing Services 3
SMICloud Framework
Decision Making Tool Service Selection
Based on QoS requirements
Service Ranking
Based on previous user experiences and performance of services
a Framework for Ranking of Cloud Computing Services 4
Quality Model for IaaSService Respond Time
Average Respond Time : ∑iTi/n
Maximum Response TimeResponse Time Failure : 100(n′/n)
SustainabilityDCIE and PUEDPPE
a Framework for Ranking of Cloud Computing Services 5
Quality Model (Cont.)Suitability
AccuracyAccuracy Frequency : Accuracy Value :
Transparency
a Framework for Ranking of Cloud Computing Services 6
Quality Model (Cont.)Interoperability
Availability
Reliability
Stability
Cost
Adaptability
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Quality Model (Cont.)Elasticity
Mean time to expand or contract capacityMaximum capacity
Usability
Throughput and efficiency
Scalability
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Quality Model AssessmentComply with IEEE Standard 1061
CorrelationPractical and computableConsistencyDiscriminative power
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Service Quality Ranking using AHP
Phase 1: hierarchy structure for cloud services based on SMI KPIs
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Service Quality Ranking using AHP (Cont.)
Phase 2: computation of relative weights of each QoS and serviceUser assigned weights using AHP’s standard method
Arbitrary user assigned weights
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Service Quality Ranking using AHP (Cont.)
Phase 3: relative value-based weights for ranking Cloud services
Boolean :
Numerical : si/sj =
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Service Quality Ranking using AHP (Cont.)
Unordered set
Essential :
Non-Essential :
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Service Quality Ranking using AHP (Cont.)
Range typeEssential :Non-Essential :
Phase 4: aggregation of relative ranking for each SMI attribute
Time complexity of AHP :
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Case Study