3 research outputs found

    Specifying Semantic Interoperability between Heterogeneous Cloud Resources with the FCLOUDS Formal Language

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    International audienceWith the advent of cloud computing, different cloud providers with heterogeneous services and Application Programming Interfaces (APIs) have emerged. Hence, building an interop-erable multi-cloud system becomes a complex task. Our idea is to design FCLOUDS framework to achieve semantic interoperability in multi-clouds, i.e., to identify the common concepts between cloud APIs and to reason over them. In this paper, we propose to take advantage of the Open Cloud Computing Interface (OCCI) standard and the Alloy formal specification language to define the FCLOUDS language, which is a formal language for specifying heterogeneous cloud APIs. To do so, we formalize OCCI concepts and operational semantics, then we identify and validate five properties (consistency, sequentiality, reversibility, idempotence and safety) that denote their characteristics. To demonstrate the effectiveness of our cloud formal language, we present thirteen case studies where we formally specify infrastructure, platform, Internet of Things (IoT) and transverse cloud concerns. Thanks to the Alloy analyzer, we verify that these heterogeneous APIs uphold the properties of FCLOUDS and also validate their own specific properties. Then, thanks to formal transformation rules and equivalence properties, we draw a precise alignment between our case studies, which promotes semantic interoperability in a multi-cloud system

    A component-based framework for certification of components in a cloud of HPC services

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    HPC Shelfis a proposal of a cloud computing platform to provide component-oriented services for High Performance Computing (HPC) applications. This paper presents a Verification-as-a-Service (VaaS) framework for component certification onHPC Shelf. Certification is aimed at providing higher confidence that components of parallel computing systems ofHPC Shelfbehave as expected according to one or more requirements expressed in their contracts. To this end, new abstractions are introduced, starting with certifier components. They are designed to inspect other components and verify them for different types of functional, non-functional and behavioral requirements. The certification framework is naturally based on parallel computing techniques to speed up verification tasks.NORTE-01-0145- FEDER-000037

    Verifying Cloud Systems using a Bigraphical Maude-based Model Checker

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    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
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