Understanding Elasticity of Cloud Services Compositions

This paper presents a new Intention Description Layer (IDL), which supports the Provision, Assurance, and Accounting (PAA) modelling approach, to enable the weaving of a new service/component to the cloud application at runtime to achieve the elasticity nature of the cloud. The new layer aims at bridging the technical details required to be understood well before injecting any service into a running application, by the user. This will be in terms of how, why and what is done by representing the business processes managed by business rules.