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Summary : The problem of deadlocks in distributed systems can be handled by prevention, avoidance and detection strategies. All methods require modeling the system by Resource Allocation graphs or Transaction-Wait-For graphs. The current methods can fail to detect deadlocks in some system scenarios and also do not provide numerical values for system deadlock probability. Analysis of complex distributed systems with varying number of processes and resources requires a computerized solution. We developed a General Transaction program, based on a technique defined as Resource Allocation Arrays, which provides a framework for representing process resource interactions in the system. The State Identifier program uses this framework to develop system state space diagrams. The State Identifier program also identifies the deadlock states in the system. Models developed in OPNET simulate the system state space and provide numerical values for probability of being in any state of the system, and in effect the probability of reaching a system deadlock. Data shows that the simulation models are 99.86% accurate. The developed computerized approach substantially reduces the numerical analysis and computational time for analyzing such complex system scenarios.
Summary : Distributed deadlock in a distributed database system is a system state in which a set of concurrently running transactions are circularly waiting for each other to release resources. Over the past decade a number of algorithms have been proposed in the literature to detect such a deadlock, but not much attention has been given to their performance. Lack of understanding of the workload for such distributed algorithms has made it difficult to predict their performance prior to actually implementing them on a distributed system. In this thesis, we present an approach to distributed workload analysis which can be used as a basis for the performance study of distributed deadlock detection algorithms. In particular, the expected number of times a deadlock detection algorithm is locally initiated and the subsequent number of remote invocations are derived. Simulation work was done to validate our approach. For the performance analysis of distributed deadlock detection algorithms, we introduce three performance measures and explain how we can analytically derive them for a given system configuration. Then, we discuss some limitations of our approach and present the alternatives we took to study the performance of distributed deadlock detection algorithms using the results of the workload analysis. Finally, results from the analysis are validated using the results from the simulations and we compare the performance of two representative algorithms.
Summary : This book describes the theory, algorithms, and practical implementation techniques behind transaction processing in information technology systems.
Summary : Hardbound. The information in this book was developed within the European Strategic Programming of Research and Development in Information Technology (ESPRIT). The purpose of this volume is to propose a European systems architecture for Computer Integrated Manufacturing (CIM) - one of the aims of the ESPRIT project.There three main objectives are: to analyse and modularise a chosen CIM scenario into twenty-four separate sub-systems; to define and describe the minimum functional provisions which each sub-system must include in order to be classified as an ESPRIT specified' CIM sub-system; to identify and explain the inter-relationships which need to exist between each particular sub-system, and all other CIM sub-systems.This book is one of the first significant Functional Specifications for CIM ever to be produced, and offers invaluable support to those working in the fields of CIM and factory automation.
Summary : This volume presents the second part of the proceedings of the Mediterranean Conference on Information & Communication Technologies (MedICT 2015), which was held at Saidia, Morocco during 7–9 May, 2015. MedICT provides an excellent international forum to the researchers and practitioners from both academia as well as industry to meet and share cutting-edge development. The conference has also a special focus on enabling technologies for societal challenges, and seeks to address multidisciplinary challenges in Information & Communication Technologies such as health, demographic change, wellbeing, security and sustainability issues. The proceedings publish high quality papers which are closely related to the various theories, as well as emerging and practical applications of particular interest to the ICT community. This second volume provides a compact yet broad view of recent developments in Data, Systems, Services and Education, and covers recent research areas in the field including Control Systems, Software Engineering, Data Mining and Big Data, ICT for Education and Support Activities, Networking, Cloud Computing and Security, ICT Based Services and Applications, Mobile Agent Systems, Software Engineering, Data Mining and Big Data, Online Experimentation & Artificial Intelligence in Education, Networking, Cloud Computing and Security, ICT Based Education and Services ICT Challenges and Applications, Advances in ICT Modeling and Design ICT Developments.
Summary : This book constitutes the refereed proceedings of the Third International Conference on High Performance Computing and Communications, HPCC 2007. The 75 revised full papers address all current issues of parallel and distributed systems and high performance computing and communication, including networking protocols, embedded systems, wireless, mobile and pervasive computing, Web services and internet computing, and programming interfaces for parallel systems.
Summary : Designing distributed computing systems is a complex process requiring a solid understanding of the design problems and the theoretical and practical aspects of their solutions. This comprehensive textbook covers the fundamental principles and models underlying the theory, algorithms and systems aspects of distributed computing. Broad and detailed coverage of the theory is balanced with practical systems-related issues such as mutual exclusion, deadlock detection, authentication, and failure recovery. Algorithms are carefully selected, lucidly presented, and described without complex proofs. Simple explanations and illustrations are used to elucidate the algorithms. Important emerging topics such as peer-to-peer networks and network security are also considered. With vital algorithms, numerous illustrations, examples and homework problems, this textbook is suitable for advanced undergraduate and graduate students of electrical and computer engineering and computer science. Practitioners in data networking and sensor networks will also find this a valuable resource. Additional resources are available online at www.cambridge.org/9780521876346.
Summary : Issues for 1973- cover the entire IEEE technical literature.