Download or read book Improving Data Consistency for Mobile File Access Using Isolation only Transactions written by Carnegie-Mellon University. Computer Science Dept and published by . This book was released on 1996 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: "Disconnected operation based on optimistic replication has been demonstrated as an effective technique enabling mobile computers to access shared data in distributed file systems. To guard against inconsistencies resulted from partitioned data sharing, past research has focused on detecting and resolving write/write conflicts. However, experience shows that undetected read/write conflicts pose a subtle but serious threat to data integrity in mobile file access. Solving this problem is critical for the future success of mobile computing. This dissertation shows that isolation-only transaction (IOT), an upward compatible transaction mechanism for the Unix File System, is a viable solution to this problem. The central idea of the IOT model is imposing serializability-based isolation requirements on partitioned transaction executions. Transactions executed on a disconnected client stay in a tentative state until the client regains connection to relevant servers. They are committed to the servers as soon as they pass consistency validation. Invalidated transactions are automatically or manually resolved to ensure global consistency. Powerful resolution mechanisms such as automatic transaction re-execution and application specific resolver invocation can transparently resolve conflicts for many common Unix applications. In addition, a concise conflict representation scheme enables application semantics to be smoothly integrated for only conflict resolution and consistency validation. The practical usability of IOT is further enhanced by a flexible interactive interface, full compatibility with existing Unix applications, and the ability to retain overall file system scalability, security and transparency. A working IOT implementation in the Coda file system has been developed and used in experiments in software development and document processing applications. Quantitative evaluation based on controlled experiments and trace-driven simulations establish that the IOT model is scalable and incurs modest performance and resource overhead. The main contributions of this thesis research are the following: the design of an isolation-only transaction model specialized for improving mobile file consistency while preserving upward compatibility with existing Unix applications; the development of a working IOT implementation in the Coda file system; experimentation and evaluation demonstrating the feasibility and practicality of the IOT model."
Download or read book Improving Data Consistency in Mobile Computing Using Isolation Only Transactions written by Qi Lu and published by . This book was released on 1995 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: "Disconnected operation is an important technique for providing mobile access to shared data in distributed file systems. However, data inconsistency resulting from partitioned sharing remains a serious concern. This paper presents a new mechanism called isolation-only transaction (IOT) that uses serializability constraints to automatically detect read/write conflicts. The IOT consistency model provides a set of options for automatic and manual conflict resolution. In addition, application specific knowledge can be incorporated to detect and resolve conflicts. To preserve upward Unix compatibility, the IOT mechanism is provided as an optional file system facility and its flexible interfaces allow any existing Unix application to be executed as an IOT. This paper describes high-level system design and implementation and concludes with related work and current status."
Download or read book Improving Data Consistency in Mobile Computing Using Isolation Only Transactions written by Qi Lu and published by . This book was released on 1995 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: "Disconnected operation is an important technique for providing mobile access to shared data in distributed file systems. However, data inconsistency resulting from partitioned sharing remains a serious concern. This paper presents a new mechanism called isolation-only transaction (IOT) that uses serializability constraints to automatically detect read/write conflicts. The IOT consistency model provides a set of options for automatic and manual conflict resolution. In addition, application specific knowledge can be incorporated to detect and resolve conflicts. To preserve upward Unix compatibility, the IOT mechanism is provided as an optional file system facility and its flexible interfaces allow any existing Unix application to be executed as an IOT. This paper describes high-level system design and implementation and concludes with related work and current status."
Download or read book Advances in Mobile Commerce Technologies written by Ee-Peng Lim and published by IGI Global. This book was released on 2003-01-01 with total page 337 pages. Available in PDF, EPUB and Kindle. Book excerpt: There is substantial interest in research in developing countries, especially in the use, implementation and development of information technology and systems. Many researchers have been moving toward an understanding of indigenous social and cultural structures and how they influence the use and development of information systems. E-Commerce and Cultural Values addresses these issues and brings together scholars to share their expertise on different aspects of the social side of e-Commerce and information systems and how they impact the cultural values of a society.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book ACM Transactions on Computer Systems written by and published by . This book was released on 2002 with total page 508 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advances in Database Technologies written by Yahiko Kambayashi and published by Springer. This book was released on 2004-01-30 with total page 614 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the thoroughly refereed joint post-proceedings of three workshops held during the 17th International Conference on Conceptual Modeling, ER '98, in Singapore in November 1998. The 50 revised papers presented have gone through two rounds of reviewing and revision. The book is divided in sections on knowledge discovery, data mining, data and web warehousing, multidimensional databases, data warehouse design, caching, data dissemination, replication, mobile networks, mobile platforms, tracking and monitoring, collaborative work support, temporal data modelling, moving objects and spatial indexing, spatio-temporal databases, and video database contents.
Download or read book Mobile Computing written by Tomasz Imielinski and published by Springer. This book was released on 2007-08-26 with total page 736 pages. Available in PDF, EPUB and Kindle. Book excerpt: The rapid development of wireless digital communication technology has cre ated capabilities that software systems are only beginning to exploit. The falling cost of both communication and of mobile computing devices (laptop computers, hand-held computers, etc. ) is making wireless computing affordable not only to business users but also to consumers. Mobile computing is not a "scaled-down" version of the established and we- studied field of distributed computing. The nature of wireless communication media and the mobility of computers combine to create fundamentally new problems in networking, operating systems, and information systems. Further more, many of the applications envisioned for mobile computing place novel demands on software systems. Although mobile computing is still in its infancy, some basic concepts have been identified and several seminal experimental systems developed. This book includes a set of contributed papers that describe these concepts and sys tems. Other papers describe applications that are currently being deployed and tested. The first chapter offers an introduction to the field of mobile computing, a survey of technical issues, and a summary of the papers that comprise sub sequent chapters. We have chosen to reprint several key papers that appeared previously in conference proceedings. Many of the papers in this book are be ing published here for the first time. Of these new papers, some are expanded versions of papers first presented at the NSF-sponsored Mobidata Workshop on Mobile and Wireless Information Systems, held at Rutgers University on Oct 31 and Nov 1, 1994.
Download or read book Fifth Workshop on Hot Topics in Operating Systems HotOS V written by IEEE Computer Society. Technical Committee on Operating Systems and published by Institute of Electrical & Electronics Engineers(IEEE). This book was released on 1995 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: Twenty-six papers from the title workshop, held in May 1995, examine controversial topics in areas including real-time and multimedia, the Internet, OS structure, and managing data. Papers include: operating system support for mobile agents; the grand unified theory of address spaces; application of
Download or read book ECOOP 2003 Object Oriented Programming written by Luca Cardelli and published by Springer Science & Business Media. This book was released on 2003-07-09 with total page 515 pages. Available in PDF, EPUB and Kindle. Book excerpt: The refereed proceedings of the 17th European Conference on Object-Oriented Programming, ECOOP 2003, held in Darmstadt, Germany in July 2003. The 18 revised full papers presented together with 2 invited papers were carefully reviewed and selected from 88 submissions. The papers are organized in topical sections on aspects and components; patterns, architecture, and collaboration; types; modeling; algorithms, optimization, and runtimes; and formal techniques and methodology.
Download or read book Encyclopedia of Information Science and Technology First Edition written by Khosrow-Pour, D.B.A., Mehdi and published by IGI Global. This book was released on 2005-01-31 with total page 3807 pages. Available in PDF, EPUB and Kindle. Book excerpt: Comprehensive coverage of critical issues related to information science and technology.
Download or read book Mobile Computing Handbook written by Mohammad Ilyas and published by CRC Press. This book was released on 2004-12-28 with total page 1072 pages. Available in PDF, EPUB and Kindle. Book excerpt: The debut of small, inexpensive, yet powerful portable computers has coincided with the exponential growth of the Internet, making it possible to access computing resources and information at nearly any location at almost any time. This new trend, mobile computing, is poised to become the main technology driver for a decade to come. There are many
Download or read book Proceedings of the Annual ACM Symposium on Principles of Distributed Computing written by and published by . This book was released on 1996 with total page 382 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of the USENIX Annual Technical Conference written by and published by . This book was released on 1999 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of the Fifteenth Annual ACM Symposium on Principles of Distributed Computing written by ACM Special Interest Group for Automata and Computability Theory and published by Association for Computing Machinery (ACM). This book was released on 1996 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Encyclopedia of Database Technologies and Applications written by Laura C. Rivero and published by IGI Global. This book was released on 2006 with total page 794 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Encyclopedia of Database Technologies and Applications is a wide-ranging collection of a diverse coverage of topics related to database concepts, technologies, and applications. This encyclopedia provides an overview of the state-of-the-art of classical subjects. It has contributions from over 175 international researchers from 33 countries, and includes more than 970 terms and definitions and over 2,400 references, This encyclopedia also delivers clear and concise explanations of emerging issues and technologies such as multimedia database systems, data warehousing and mining, geospatial and temporal databases, and data reverse engineering. The Encyclopedia of Database Technologies and Applications is a single reference source for any library on the topic of database technologies and applications.
Download or read book ECOOP written by and published by . This book was released on 2003 with total page 528 pages. Available in PDF, EPUB and Kindle. Book excerpt:
