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Service-based systems that are dynamically composed at runtime to provide complex, adaptive functionality are currently one of the main development paradigms in software engineering. However, the Quality of Service (QoS) delivered by these systems remains an important concern, and needs to be managed in an equally adaptive and predictable way. To address this need, we introduce a novel, tool-supported...
The CONNECT European project that started in February 2009 aims at dropping the interoperability barrier faced by todaypsilas distributed systems. It does so by adopting a revolutionary approach to the seamless networking of digital systems, that is, synthesizing on the fly the connectors via which networked systems communicate. CONNECT then investigates formal foundations for connectors together...
The software underpinning today's IT systems needs to adapt dynamically and predictably to rapid changes in system workload, environment and objectives. We describe a software framework that achieves such adaptiveness for IT systems whose components can be modelled as Markov chains. The framework comprises (i) an autonomic architecture that uses Markov-chain quantitative analysis to dynamically adjust...
The paper introduces a framework for the formal specification of autonomic computing policies, and uses it to define a new type of autonomic computing policy termed a resource-definition policy. We describe the semantics of resource-definition policies, explain how they can be used as a basis for the development of autonomic system of systems, and present a sample data-centre application built using...
In the past, intelligent adaptive controllers have been proposed and shown to achieve performance and safety objectives when operating within complex and highly dynamic problem domains such as Gas-Turbine Aero Engine control. The behaviour of control functions in safety critical software systems is typically bounded to prevent the occurrence of known system level hazards. These bounds are typically...
Cancer clinical trials pose significant challenges to the e-Science community. The information technology required to enable this kind of large-scale, collaborative science will need to support easy and rapid development and deployment of reliable and flexible software systems that enable syntactic, semantic and computational interoperability. CancerGrid, an e-Science consortium funded by the UK Medical...
The CancerGrid consortium is developing open- standards cancer informatics to address the challenges posed by modern cancer clinical trials. This paper presents the service-oriented software paradigm implemented in CancerGrid to derive clinical trial information management systems for collaborative cancer research across multiple institutions. Our proposal is founded on a combination of a clinical...
Based on insights from the implementation of commercial products for data-centre resource management, we identified key challenges in the development of cost-effective autonomic solutions, and best practices for overcoming these challenges. In a related paper, we proposed a generic autonomic framework that complies with these best practices, and suggested ways in which existing technologies could...
Based on insights from the development of a commercial framework for the autonomic management of data center resources, we identify some of the main challenges faced by autonomic architectures. We describe a number of best practices for overcoming or, in some cases, working around these challenges, and we propose a general-purpose autonomic architecture that complies with our best practices and builds...
It is a common phenomenon for research projects to collect and analyse valuable data using ad-hoc information systems. These costly-to-build systems are often composed of incompatible variants of the same modules, and record data in ways that prevent any meaningful result analysis across similar projects. We present a framework that uses a combination of formal methods, model-driven development and...
We present a generic architecture for developing fully-fledged autonomic systems out of non-autonomic components, and investigate how the architecture can be implemented using existing technologies. The universal policy engine at the core of the architecture is configured by means of a model of the resources placed under its control, and uses a set of flexible policies for their management.
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