Patterns for SLA Aggregation in Cloud Computing (T-0704) (MFN 4233)

Abstract

In Cloud Computing Infrastructure or other eBusiness raised areas, Service Level Agreement (SLA) is an important element as it decreases the consumer’s dependency on corresponding providers. In Service Oriented Infrastructure (SOI), Service Level Agreements are electronic contracts among service providers, consumers and its services. In this thesis, we are aiming to describe a SLA Aggregation model with hierarchal arrangements like service value chains and Business Value Network (BVN). In the hierarchy of SLAs, SLAs alongwith contractual information, are desired to be controlled for security, trust and privacy concerns; we applied our proposed SLA-ViewZone Pattern on novel business scenarios resulting in SLA aggregation patterns represented on our SLA Business Process Model Notations (BPN). Proposed SLA-ViewZone template is used to assure the trust and privacy of stakeholders in SLA Choreography as by business point of view each business has its own private information. The whole network of SLAs along with service Choreography which describes its proper approach is recognized as SLA Choreography. We introduced several SLA aggregation Patterns and extended SLA Aggregation Functions based on SLA aggregation formal and notational model. This approach makes the process of SLA aggregation corresponding to the hierarchical service composition simple and understandable. We applied our proposed notations, SLA Aggregation Patterns and Aggregation functions on several business models to fostering BVNs. Further we classify SLA Aggregation Patterns into main classes; Topological Patterns and Value Network Patterns which sortouts the aggregation patterns at hierarchical level. These SLA Aggregation Patterns and SLA Aggregation Functions play a pivotal role in the formation of inter-organizational business process management, BVNs and service value chains etc.