Download or read book Performance Scalability and Robustness in Distributed File Tree Copy written by Christopher Robert Sutton and published by . This book was released on 2018 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: "As storage needs continually increase, and network file systems become more common, the need arises for tools that efficiently copy to and from these types of file systems. Traditional copy tools like the Linux cp utility were originally created for traditional storage systems, where storage is managed by a single host machine. cp uses a single-threaded approach to copying files. Using a multi-threaded approach would likely not provide an advantage in this system since the disk accesses are the bottleneck for this type of operation. In a distributed file system the disk accesses are spread across multiple hosts, and many accesses can be served simultaneously. Volumes in a distributed file system still look like a single storage device to the operating system of a client machine, so traditional tools like cp can still be used, but they cannot take advantage of the performance increase offered by a distributed, multi-node approach. While some research has been done in this area and some tools have been created there are still shortcomings in the area, particularly when it comes to scalability and robustness to process failure. The research presented here attempts to adress these shortcomings. The software created in this project was tested in a variety of enviornments and compared to other other tools that have attempted to make improvements in these areas. In the area of scalability, this software performed well from a small cluster to large high-performance-computing cluster. In comparisons to other tools, the performance was comparable to or better than the other tools measured. The unique contribution of this project is in the area of robustness, which other tools have not attempted to address. The software allows the use to specify a minimum number of processes that can fail without losing progress or requiring a restart of the copy job. This means process death can be tolerated, or resources can be diverted after the start of the copy job. This is especially helpful in very large, long-running jobs. Many clusters are made with low-cost, consumer-grade hardware which is susceptible to failure. A study entitled 'Failure Trends in a Large Disk Drive Population' [2], published in the proceedings of the USENIX FAST'07 conference, looked at the failure rate of disk drives across Google's various services. It found that a large number of drives fail within a few years. Drive failure rate was somewhat high within the first few months, weeding out the lower quality drives, but at the two and three year mark as many as eight percent of drives failed per year. This high rate shows the importance of software like this that can tolerate these types of failures."--Boise State University ScholarWorks.

Download or read book Understanding Directory Services written by Beth Sheresh and published by Sams Publishing. This book was released on 2002 with total page 646 pages. Available in PDF, EPUB and Kindle. Book excerpt: Book Description Understanding Directory Servicesclarifies the complex topic of directory services, starting with basic theory and archetypes, and then working its way up to the current directory service implementations. It describes the basic idea behind directory services, explaining the underlying conceptual models, design characteristics, and methods of managing distributed information. The book begins with an overview of directory services and their core characteristics, highlighting critical aspects of directory information, distribution, and storage. The evolving nature of the information the directory contains, and the factors involved in organizing and managing it are discussed in detail, and then methods of information distribution and storage are examined at length. After exploring the basics of directory service, the book progresses to in-depth chapters on each of the critical technologies being used to implement directory services: * The X.500standards are explained to help you understand the foundations of directory services and provide a basis for comparison of the other directory technologies. *Lightweight Directory Access Protocol(LDAP) and its emerging role as a directory access standard is described in detail, with thorough explanations of models, naming, and operations. *The Domain Name System(DNS) is examined from a directory service perspective, noting parallels in structures and operations. This knowledge of directory services is then used to describe the design of X.500 and LDAP based directory service products, as well as NDS eDirectory and Active Directory, highlighting the architectural and operational implications of vendor's design decisions. This book: * Explores X.500-based directory products (eTrust, DirX, Nexor), and highlights implementation approaches and capabilities. * Describes the LDAP-based directory products (OpenLDAP, SecureWay, iPlanet), identifying similarities and differences between them. * ExplainsNDS eDirectorydescribing the underlying directory architecture and its foundations in X.500, and its evolution from an NOS-based directory to a general purpose directory service. * Examines howActive Directoryintegrates NT 4, LDAP, and DNS technologies into a directory service that leverages established Windows networks. * Explores the information management issues that meta-directories (Siemens DirXmetahub, iPlanet meta-directory, Microsoft Meta-directory Services, Novell DirXML) are designed to address, and characteristics of different types of meta-directory solutions (as well as Radiant Logic'sRadiant Onevirtual directory server). * Identifies the design of XML-based directory markup languages that map directory schema, objects, and operations providing directory interoperability. The final chapter is focused on helping you evaluate directory services in the context of your business and network environment. Information, business, and network control factors are identified, and key factors in directory service assessment are explained. Understanding Directory Servicesis an excellent reference for directory service technologies that includes extensive references and aglossarycontaining 385 directory service terms. By explaining key directory technologies, and the integration of those technologies, this book provides the information you need to understand the design and operations involved in all directory services. From the Back Cover Understanding Directory Servicesis the most in-depth resource available on directory services theory, architecture, and design. It provides the conceptual framework and critical technical information for IT professionals who are using directory services in their networks or e-business solutions. The 1st edition of this book covered the underlying directory service technologies (X.500, LDAP, DNS), and integrated the information from a networking perspective with a special focus on eDirectory and Active Directory. The 2nd Edition extends this coverage to the LDAP-based directories (such as iPlanet and SecureWay) and the X.500-based enterprise directory services (including eTrust, DirX, and Nexor), as well as the emerging meta-directory technologies and products which are crucial to the integration of the multiple directories in an enterprise networking environment. By explaining the origins and technologies of directory services, and clarifying the integration of key directory technologies into network and e-commerce platforms,Understanding Directory Servicesgives you the information you need to understand the underlying design and operations involved in all directory services. Reviews of the first edition Warren E. Wyrostek -- MCP Magazine ...superb, comprehensive...highly recommend it to all network professionals...a must read for anyone wrestling with deploying a directory service... Douglas Ludens -- About.com ...clearly organized and well written...a great book, I highly recommend it...essential to doing well with Windows 2000...

Download or read book NFS Illustrated written by Brent Callaghan and published by Addison-Wesley Professional. This book was released on 2000 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt: One of the original developers of the NFS and WebNFS offers unique insight into these key technologies, for both programmers creating and debugging NFS-based applications and network engineers creating new implementations. Readers can gain a deeper understanding of how network file protocols are designed and learn how NFS is implemented on UNIX, Windows NT, Java and web browsers.

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 2005 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Distributed and Cloud Computing written by Kai Hwang and published by Morgan Kaufmann. This book was released on 2013-12-18 with total page 671 pages. Available in PDF, EPUB and Kindle. Book excerpt: Distributed and Cloud Computing: From Parallel Processing to the Internet of Things offers complete coverage of modern distributed computing technology including clusters, the grid, service-oriented architecture, massively parallel processors, peer-to-peer networking, and cloud computing. It is the first modern, up-to-date distributed systems textbook; it explains how to create high-performance, scalable, reliable systems, exposing the design principles, architecture, and innovative applications of parallel, distributed, and cloud computing systems. Topics covered by this book include: facilitating management, debugging, migration, and disaster recovery through virtualization; clustered systems for research or ecommerce applications; designing systems as web services; and social networking systems using peer-to-peer computing. The principles of cloud computing are discussed using examples from open-source and commercial applications, along with case studies from the leading distributed computing vendors such as Amazon, Microsoft, and Google. Each chapter includes exercises and further reading, with lecture slides and more available online. This book will be ideal for students taking a distributed systems or distributed computing class, as well as for professional system designers and engineers looking for a reference to the latest distributed technologies including cloud, P2P and grid computing. - Complete coverage of modern distributed computing technology including clusters, the grid, service-oriented architecture, massively parallel processors, peer-to-peer networking, and cloud computing - Includes case studies from the leading distributed computing vendors: Amazon, Microsoft, Google, and more - Explains how to use virtualization to facilitate management, debugging, migration, and disaster recovery - Designed for undergraduate or graduate students taking a distributed systems course—each chapter includes exercises and further reading, with lecture slides and more available online

Download or read book Proceedings written by and published by . This book was released on 2005 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 994 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book High Performance Modelling and Simulation for Big Data Applications written by Joanna Kołodziej and published by Springer. This book was released on 2019-03-25 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt: This open access book was prepared as a Final Publication of the COST Action IC1406 “High-Performance Modelling and Simulation for Big Data Applications (cHiPSet)“ project. Long considered important pillars of the scientific method, Modelling and Simulation have evolved from traditional discrete numerical methods to complex data-intensive continuous analytical optimisations. Resolution, scale, and accuracy have become essential to predict and analyse natural and complex systems in science and engineering. When their level of abstraction raises to have a better discernment of the domain at hand, their representation gets increasingly demanding for computational and data resources. On the other hand, High Performance Computing typically entails the effective use of parallel and distributed processing units coupled with efficient storage, communication and visualisation systems to underpin complex data-intensive applications in distinct scientific and technical domains. It is then arguably required to have a seamless interaction of High Performance Computing with Modelling and Simulation in order to store, compute, analyse, and visualise large data sets in science and engineering. Funded by the European Commission, cHiPSet has provided a dynamic trans-European forum for their members and distinguished guests to openly discuss novel perspectives and topics of interests for these two communities. This cHiPSet compendium presents a set of selected case studies related to healthcare, biological data, computational advertising, multimedia, finance, bioinformatics, and telecommunications.

Download or read book InfoWorld written by and published by . This book was released on 1996-12-16 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: InfoWorld is targeted to Senior IT professionals. Content is segmented into Channels and Topic Centers. InfoWorld also celebrates people, companies, and projects.

Download or read book Developing with Google App Engine written by Eugene Ciurana and published by Apress. This book was released on 2009-03-22 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: Developing with Google App Engine introduces development with Google App Engine, a platform that provides developers and users with infrastructure Google itself uses to develop and deploy massively scalable applications. Introduction to concepts Development with App Engine Deployment into App Engine

Download or read book Distributed Systems written by Andrew S. Tanenbaum and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This second edition of Distributed Systems, Principles & Paradigms, covers the principles, advanced concepts, and technologies of distributed systems in detail, including: communication, replication, fault tolerance, and security. Intended for use in a senior/graduate level distributed systems course or by professionals, this text systematically shows how distributed systems are designed and implemented in real systems.

Download or read book Modern B Tree Techniques written by Goetz Graefe and published by Now Publishers Inc. This book was released on 2011 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: Invented about 40 years ago and called ubiquitous less than 10 years later, B-tree indexes have been used in a wide variety of computing systems from handheld devices to mainframes and server farms. Over the years, many techniques have been added to the basic design in order to improve efficiency or to add functionality. Examples include separation of updates to structure or contents, utility operations such as non-logged yet transactional index creation, and robust query processing such as graceful degradation during index-to-index navigation. Modern B-Tree Techniques reviews the basics of B-trees and of B-tree indexes in databases, transactional techniques and query processing techniques related to B-trees, B-tree utilities essential for database operations, and many optimizations and improvements. It is intended both as a tutorial and as a reference, enabling researchers to compare index innovations with advanced B-tree techniques and enabling professionals to select features, functions, and tradeoffs most appropriate for their data management challenges.

Download or read book Advances in Parallel and Distributed Computing written by and published by . This book was released on 1997 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book IBM Journal of Research and Development written by and published by . This book was released on 1998 with total page 904 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Disconnected Operation in a Distributed File System written by James J. Kistler and published by Springer. This book was released on 2006-01-20 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is based on the author's PhD thesis which was selected during the 1993 ACM Doctoral Dissertation Competition as one of the three best submissions. The focus of this work is on the issue of availability in distributed file systems. It presents the important new technique called disconnected operation, in which clients mask failures and voluntary network detachments by emulating the functionality of servers where actual server-oriented solutions are inadequate. This permits client operation even under complete isolation from the server; the clean integration of mobile computers into the system is an important side-effect of the new technique. The design and implementation of disconnected file service in a working system, the Coda file system, is described in detail.

Download or read book Data Intensive Text Processing with MapReduce written by Jimmy Lin and published by Springer Nature. This book was released on 2022-05-31 with total page 171 pages. Available in PDF, EPUB and Kindle. Book excerpt: Our world is being revolutionized by data-driven methods: access to large amounts of data has generated new insights and opened exciting new opportunities in commerce, science, and computing applications. Processing the enormous quantities of data necessary for these advances requires large clusters, making distributed computing paradigms more crucial than ever. MapReduce is a programming model for expressing distributed computations on massive datasets and an execution framework for large-scale data processing on clusters of commodity servers. The programming model provides an easy-to-understand abstraction for designing scalable algorithms, while the execution framework transparently handles many system-level details, ranging from scheduling to synchronization to fault tolerance. This book focuses on MapReduce algorithm design, with an emphasis on text processing algorithms common in natural language processing, information retrieval, and machine learning. We introduce the notion of MapReduce design patterns, which represent general reusable solutions to commonly occurring problems across a variety of problem domains. This book not only intends to help the reader "think in MapReduce", but also discusses limitations of the programming model as well. Table of Contents: Introduction / MapReduce Basics / MapReduce Algorithm Design / Inverted Indexing for Text Retrieval / Graph Algorithms / EM Algorithms for Text Processing / Closing Remarks

Download or read book The Best Damn Windows Server 2008 Book Period written by Anthony Piltzecker and published by Elsevier. This book was released on 2011-08-31 with total page 821 pages. Available in PDF, EPUB and Kindle. Book excerpt: Best Damn Windows Server 2008 Book Period, Second Edition is completely revised and updated to Windows Server 2008. This book will show you how to increase the reliability and flexibility of your server infrastructure with built-in Web and virtualization technologies; have more control over your servers and web sites using new tools like IIS7, Windows Server Manager, and Windows PowerShell; and secure your network with Network Access Protection and the Read-Only Domain Controller. - Web server management with Internet Information Services 7.0 - Virtualize multiple operating systems on a single server - Hardening Security, including Network Access Protection, Federated Rights Management, and Read-Only Domain Controller