Download or read book A Framework for Customizing Coherence Protocols of Distributed File Caches in Lucas File System written by Tōkyō Daigaku. Dept. of Information Science and published by . This book was released on 1994 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: "In cooperative applications such as group CAD and group software development systems, multiple processes communicate with each other by sharing complex data consisting of nested structures and pointers. Although the sharing of complex data structures in the distributed environment is achieved through the technology of distributed shared memory, a single cache coherence protocol cannot efficiently serve various access patterns generated by cooperative applications. By having a framework for allowing cooperative applications to customize coherence protocols according to their behaviors, hence, significant improvement of run-time efficiency is expected. This paper describes a framework of protocol customization for the sharing of volatile and persistent data in cooperative applications. The major obstacle in user-level customization of protocols is that there are too many states and state transitions in an unabstracted protocol to enable average users to describe them. The protocol customization system (PCS) in this paper solves this problem by introducing high-level model for protocol description that abstracted away non-determinism of messages, synchronization among hosts, and local paging actions. Consequently, users can define with brief descriptions cache coherence protocols that are adapted for particular applications. The ability of PCS to describe different kinds of protocols is examined in this paper, and its run-time performance and memory usages are investigated."
Download or read book Model Checking Cache Coherence Protocols for Distributed File Systems written by Mandana Vaziri-Farahani and published by . This book was released on 1995 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: "Debugging complex software systems is a major problem. Proving properties of software systems can be thought of as a debugging tool. If a system S must satisfy property P but we can prove that it does not, then S has bugs in it. On the other hand, if S is proved to satisfy P then this is just a confirmation that a certain aspect of S is correct. We can prove properties of software systems at any stage of development. If we do these proofs early in the design stage, we can prevent errors from propagating to later development stages and therefore save time, money, and human effort. The traditional approach to proving properties of software systems is theorem proving. This approach has several pragmatic drawbacks. The size of the programs that we can prove correct is not very large. Theorem proving must be done by highly skilled experts in the field. Our approach to proving properties of software systems is model checking, which consists of proving the property by automatically checking every state in the system. Model checking is a technique successfully used in hardware verification. The model checking tool we use is SMV, which takes as input a finite state machine (FSM) and a property P expressed in Computation Tree Logic (CTL) and outputs true if the FSM satisfies P or false otherwise. If the outcome is false then SMV also outputs a counterexample. Because software systems are not, in general, finite state machines, model checking seems to be inadequate at first glance. However, we can overcome this problem by abstracting the system and checking a finite model of it. We use this method to check cache coherence protocols for distributed systems. The protocols we use are those of the Andrew File System and the Coda File System. We check a cache coherence invariant on the specifications of these protocols, which are natural abstractions of the systems. We perform other abstractions to reduce the size of the systems to manageable finite state machines. SMV checked our cache coherence invariant successfully and indicated that the protocol specifications satisfy this property. For our most complicated protocol, SMV took less than 1 second to check a finite state machine with over 43,600 reachable states."
Download or read book Report written by and published by . This book was released on 1998 with total page 604 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Software Techniques for Customizable Distributed Shared Memory written by Satish Chandra and published by . This book was released on 1997 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Model Checking Cache Coherence Protocols for Distributed File Systems written by Mandana Vaziri-Farahani and published by . This book was released on 1995 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: "Debugging complex software systems is a major problem. Proving properties of software systems can be thought of as a debugging tool. If a system S must satisfy property P but we can prove that it does not, then S has bugs in it. On the other hand, if S is proved to satisfy P then this is just a confirmation that a certain aspect of S is correct. We can prove properties of software systems at any stage of development. If we do these proofs early in the design stage, we can prevent errors from propagating to later development stages and therefore save time, money, and human effort. The traditional approach to proving properties of software systems is theorem proving. This approach has several pragmatic drawbacks. The size of the programs that we can prove correct is not very large. Theorem proving must be done by highly skilled experts in the field. Our approach to proving properties of software systems is model checking, which consists of proving the property by automatically checking every state in the system. Model checking is a technique successfully used in hardware verification. The model checking tool we use is SMV, which takes as input a finite state machine (FSM) and a property P expressed in Computation Tree Logic (CTL) and outputs true if the FSM satisfies P or false otherwise. If the outcome is false then SMV also outputs a counterexample. Because software systems are not, in general, finite state machines, model checking seems to be inadequate at first glance. However, we can overcome this problem by abstracting the system and checking a finite model of it. We use this method to check cache coherence protocols for distributed systems. The protocols we use are those of the Andrew File System and the Coda File System. We check a cache coherence invariant on the specifications of these protocols, which are natural abstractions of the systems. We perform other abstractions to reduce the size of the systems to manageable finite state machines. SMV checked our cache coherence invariant successfully and indicated that the protocol specifications satisfy this property. For our most complicated protocol, SMV took less than 1 second to check a finite state machine with over 43,600 reachable states."
Download or read book The International Conference on Distributed Computing Systems written by and published by . This book was released on 1996 with total page 800 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of the 16th International Conference on Distributed Computing Systems written by and published by . This book was released on 1996 with total page 822 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Design of a High Performance High Availability Distributed File System written by Chetan Ahuja and published by . This book was released on 2001 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Adaptive Caching in a Distributed File System written by Swee Boon Lim and published by . This book was released on 1995 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt: Effective file system caching reduces local disk accesses and remote file server accesses significantly. Traditional file systems use fixed strategies to control caching. This thesis shows that a file system with adaptive caching achieves better performance than traditional file systems. Our file system implements multiple caching strategies and permits performance tuning through customized caching strategies. It adapts to the computing environment by selecting strategies suitable for the environment. It observes file accesses and uses the observed behaviors to anticipate and predict future behaviors. It adapts to different file access behaviors by modifying caching strategies. It does not depend on the application or the user for caching hints but will utilize hints when provided. Experiments with two large workloads having distinct file access characteristics show that adaptive file caching consistently outperforms non-adaptive caching. Adaptive file caching can reduce runtime by 36.6%, cache misses by 20.6%, and network load by 24.2%. In addition, this work also includes innovations in file system architecture. They include continuations for highly-concurrent asynchronous remote accesses, and zombies for efficient memory reclamation.
Download or read book Proceedings of the Conference on Domain Specific Languages October 15 17 1997 Santa Barbara California written by USENIX Association and published by Usenix Association. This book was released on 1997 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings written by International Workshop on Object-Orientation in Operating Systems 4, 1995, Lund, Sweden and published by . This book was released on 1995 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Developing Multi Agent Systems with JADE written by Fabio Luigi Bellifemine and published by John Wiley & Sons. This book was released on 2007-03-13 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt: Learn how to employ JADE to build multi-agent systems! JADE (Java Agent DEvelopment framework) is a middleware for the development of applications, both in the mobile and fixed environment, based on the Peer-to-Peer intelligent autonomous agent approach. JADE enables developers to implement and deploy multi-agent systems, including agents running on wireless networks and limited-resource devices. Developing Multi-Agent Systems with JADE is a practical guide to using JADE. The text will give an introduction to agent technologies and the JADE Platform, before proceeding to give a comprehensive guide to programming with JADE. Basic features such as creating agents, agent tasks, agent communication, agent discovery and GUIs are covered, as well as more advanced features including ontologies and content languages, complex behaviours, interaction protocols, agent mobility, and the in-process interface. Issues such as JADE internals, running JADE agents on mobile devices, deploying a fault tolerant JADE platform, and main add-ons are also covered in depth. Developing Multi-Agent Systems with JADE: Comprehensive guide to using JADE to build multi-agent systems and agent orientated programming. Describes and explains ontologies and content language, interaction protocols and complex behaviour. Includes material on persistence, security and a semantics framework. Contains numerous examples, problems, and illustrations to enhance learning. Presents a case study demonstrating the use of JADE in practice. Offers an accompanying website with additional learning resources such as sample code, exercises and PPT-slides. This invaluable resource will provide multi-agent systems practitioners, programmers working in the software industry with an interest on multi-agent systems as well as final year undergraduate and postgraduate students in CS and advanced networking and telecoms courses with a comprehensive guide to using JADE to employ multi agent systems. With contributions from experts in JADE and multi agent technology.
Download or read book The Wealth of Networks written by Yochai Benkler and published by Yale University Press. This book was released on 2006-01-01 with total page 532 pages. Available in PDF, EPUB and Kindle. Book excerpt: Describes how patterns of information, knowledge, and cultural production are changing. The author shows that the way information and knowledge are made available can either limit or enlarge the ways people create and express themselves. He describes the range of legal and policy choices that confront.
Download or read book Computer Architecture written by John L. Hennessy and published by Elsevier. This book was released on 2012 with total page 858 pages. Available in PDF, EPUB and Kindle. Book excerpt: The computing world is in the middle of a revolution: mobile clients and cloud computing have emerged as the dominant paradigms driving programming and hardware innovation. This book focuses on the shift, exploring the ways in which software and technology in the 'cloud' are accessed by cell phones, tablets, laptops, and more
Download or read book The Use of Force in UN Peace Operations written by Trevor Findlay and published by Oxford University Press on Demand. This book was released on 2002 with total page 486 pages. Available in PDF, EPUB and Kindle. Book excerpt: One of the most vexing issues that has faced the international community since the end of the Cold War has been the use of force by the United Nations peacekeeping forces. UN intervention in civil wars, as in Somalia, Bosnia and Herzegovina, and Rwanda, has thrown into stark relief the difficulty of peacekeepers operating in situations where consent to their presence and activities is fragile or incomplete and where there is little peace to keep. Complex questions arise in these circumstances. When and how should peacekeepers use force to protect themselves, to protect their mission, or, most troublingly, to ensure compliance by recalcitrant parties with peace accords? Is a peace enforcement role for peacekeepers possible or is this simply war by another name? Is there a grey zone between peacekeeping and peace enforcement? Trevor Findlay reveals the history of the use of force by UN peacekeepers from Sinai in the 1950s to Haiti in the 1990s. He untangles the arguments about the use of force in peace operations and sets these within the broader context of military doctrine and practice. Drawing on these insights the author examines proposals for future conduct of UN operations, including the formulation of UN peacekeeping doctrine and the establishment of a UN rapid reaction force.
Download or read book Proceedings of the Applied Networking Research Workshop written by ACM Special Interest Group on Data Communication and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Handbook of Consumer Psychology written by Curtis P. Haugtvedt and published by Psychology Press. This book was released on 2018-12-07 with total page 1892 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Handbook contains a unique collection of chapters written by the world's leading researchers in the dynamic field of consumer psychology. Although these researchers are housed in different academic departments (ie. marketing, psychology, advertising, communications) all have the common goal of attaining a better scientific understanding of cognitive, affective, and behavioral responses to products and services, the marketing of these products and services, and societal and ethical concerns associated with marketing processes. Consumer psychology is a discipline at the interface of marketing, advertising and psychology. The research in this area focuses on fundamental psychological processes as well as on issues associated with the use of theoretical principles in applied contexts. The Handbook presents state-of-the-art research as well as providing a place for authors to put forward suggestions for future research and practice. The Handbook is most appropriate for graduate level courses in marketing, psychology, communications, consumer behavior and advertising.
