Verifying Cloud Systems using a Bigraphical Maude-based Model Checker

Formal methods are system design techniques based on rigorous mathematical models to build software systems. Our aim in this paper is to define formal specifications of cloud systems and offer analysis support to formally model check their inherent properties. Hence, we define a formal semantic framework, based on Bigraphical Reactive Systems (BRS), for specifying cloud architectures and their shape shifting to ensure service availability and quick scalability. Then, we propose a Bigraphical Maude-based Model Checker to formally verify some properties.31

A Theoretical Approach for Modelling Cloud Services Composition

International audienceCloud services are designed to provide remote and scalable access to applications and resources. They are inclined to be composed for creating more complex value-added services. Cloud Services Composition (CSC) has become an increasingly active area in both research topics and technological fields. An important and challenging issue in this area is how to model Cloud services for supporting services composition with all its facets. Relying heavily on mathematical definitions, formal methods may be applied in this context to provide a precise model of Cloud Services Composition. This paper investigates the use of Milner's bigraphs for modelling Cloud Services Composition. As its main result, we first present a meta-model for Cloud Services Composition. Then, we define a Bigraph model for Cloud Services Composition (BiG-CSC), which associates a formal semantic to the meta-model. Finally, a graphical environment based on the Eclipse Modelling Framework is proposed to validate our modelling methodology for Cloud Services Composition. \textcopyright 2016 IEEE