The key to client/server computing. Transaction processing techniques are deeply ingrained in the fields of databases and operating systems and are used to monitor, control and update information in modern computer systems. This book will show you how large, distributed, heterogeneous computer systems can be made to work reliably. Using transactions as a unifying conceptual framework, the authors show how to build high-performance distributed systems and high-availability applications with finite budgets and risk. The authors provide detailed explanations of why various problems occur as well as practical, usable techniques for their solution. Throughout the book, examples and techniques are drawn from the most successful commercial and research systems. Extensive use of compilable C code fragments demonstrates the many transaction processing algorithms presented in the book. The book will be valuable to anyone interested in implementing distributed systems or client/server architectures.
Master SQL Server´s Concurrency Model so you can implement high-throughput systems that deliver transactional consistency to your application customers. This book explains how to troubleshoot and address blocking problems and deadlocks, and write code and design database schemas to minimize concurrency issues in the systems you develop. SQL Server´s Concurrency Model is one of the least understood parts of the SQL Server Database Engine. Almost every SQL Server system experiences hard-to-explain concurrency and blocking issues, and it can be extremely confusing to solve those issues without a base of knowledge in the internals of the Engine. While confusing from the outside, the SQL Server Concurrency Model is based on several well-defined principles that are covered in this book. Understanding the internals surrounding SQL Server´s Concurrency Model helps you build high-throughput systems in multi-user environments. This book guides you through the Concurrency Model and elaborates how SQL Server supports transactional consistency in the databases. The book covers all versions of SQL Server, including Microsoft Azure SQL Database, and it includes coverage of new technologies such as In-Memory OLTP and Columnstore Indexes. What You´ll Learn Know how transaction isolation levels affect locking behavior and concurrency Troubleshoot and address blocking issues and deadlocks Provide required data consistency while minimizing concurrency issues Design efficient transaction strategies that lead to scalable code Reduce concurrency problems through good schema design Understand concurrency models for In-Memory OLTP and Columnstore Indexes Reduce blocking during index maintenance, batch data load, and similar tasks Who This Book Is For SQL Server developers, database administrators, and application architects who are developing highly-concurrent applications. The book is for anyone interested in the technical aspects of creating and troubleshooting high-throughput systems that respond swiftly to user requests.
Mit SystemC, einer auf C++ aufbauenden Bibliothek, können digitale elektronische Systeme modelliert und simuliert werden, insbesondere auf der sogenannten Transaktionsebene (Transaction-Level-Modeling: TLM). SystemC hat sich über einen Zeitraum von etwa zehn Jahren zur Reife entwickelt, wurde in jüngster Zeit standardisiert und findet zunehmend Verbreitung in der Hochschullehre und der Industrie. Dieses Lehrbuch bietet eine leicht verständliche und praxisnahe Einführung in die Modellierung von digitalen Systemen mit SystemC nach dem IEEE Standard 1666-2011. Im Vordergrund steht dabei die Modellierung auf der Transaktionsebene. Die Lerninhalte werden anhand einer Vielzahl von anschaulichen und nachvollziehbaren Beispielen vermittelt. Übungsaufgaben am Ende jedes Kapitels dienen der Vertiefung des Erlernten. Alle Programmbeispiele und die Lösungen zu den Übungen stehen zum Download zur Verfügung.
Now that consumer purchases with mobile phones are on the rise, how do you design a payment app that?s safe, easy to use, and compelling? With this practical book, interaction and product designer Skip Allums provides UX best practices and recommendations to help you create familiar, friendly, and trustworthy experiences. Consumers want mobile transactions to be as fast and reliable as cash or bank cards. This book shows designers, developers, and product managers?from startups to financial institutions?how to design mobile payments that not only safeguard identity and financial data, but also provide value-added features that exceed customer expectations. * Learn about the major mobile payment frameworks: NFC, cloud, and closed loop * Examine the pros and cons of Google Wallet, Isis, Square, PayPal, and other payment apps * Provide walkthroughs, demos, and easy registration to quickly gain a new user?s trust * Design efficient point-of-sale interactions, using NFC, QR, barcodes, or geolocation * Add peripheral services such as points, coupons and offers, and money management
This book is a comprehensive and easy-to-understand guide for using the Oracle Data Provider (ODP) version 11g on the .NET Framework. It also outlines the core GoF (Gang of Four) design patterns and coding techniques employed to build and deploy high-impact mission-critical applications using advanced Oracle database features through the ODP.NET provider. The book details the features of the ODP.NET provider in two main sections: ´´Basic,´´ covering the basics and mechanisms for data access via ODP.NET; and ´´Advanced,´ covering advanced Oracle features such as globalization, savepoints, distributed transactions and how to call them via ODP.NET, advanced queueing (AQ), and promotable transactions. It takes you from the ground up through different implementation scenarios via a rich collection of C# code samples. It outlines database security and performance optimization tricks and techniques on ODP.NET that conform to best practices and adaptable design. Different GoF design patterns are highlighted for different types of ODP.NET usage scenarios with consideration of performance and security. It provides a comprehensive guide to the synergistic integration of Oracle and Microsoft technologies such as the Oracle Developer Tools for Visual Studio (18.104.22.168.10). It also details how programmers can make use of ODT to streamline the creation of robust ODP.NET applications from within the Visual Studio environment.
Principles of Computer System Design: An Introduction is the first book to identify, examine, and illustrate the fundamental principles and abstractions in computer system design that are common across operating systems, networks, database systems, distributed systems, programming languages, software engineering, and computer architecture. Through carefully analyzed case studies from each of these disciplines, it demonstrates how to apply these principles and abstractions to tackle real system design problems. To support the focus on design, the book identifies and explains abstractions that have proven successful in practice such as, names, remote procedure call, client/service organization, file systems, transactions, replication with repair, read/write coherence, and authenticated and confidential messages. These abstractions allow designers to compose systems with increasingly strong modularity, to protect against failures ranging from accidental programmer errors to malicious adversaries. This book describes how these abstractions are implemented, demonstrates how they are used in different systems, and prepares the reader to apply them in future designs.
L´émergence des services web a créé de nos jours d´importantes opportunités pour les entreprises, parallèlement à cela, les réseaux mobiles sont devenus un standard dans la vie moderne. Les services web dans les environnements sans fil constituent un nouveau challenge pour la technologie. Dans ce mémoire, nous nous sommes intéressés à l´évaluation de performance des services web. Plus particulièrement, nous avons cherché à modéliser, par le formalisme des réseaux de pétri, le comportement des services dans l´environnement mobile. Nous avons dans un premier temps étudié les services web et les technologies associées, puis nous avons, dans un second temps présenté l´environnement d´exécution des services web : l´environnement mobile, son architecture, ses caractéristiques et la gestion des transactions ainsi que le protocole WAP. Les réseaux de petri stochastiques bien formés utilisés pour la modélisation des services web dans l´environnement mobile sont ensuite présentés et enfin nous avons proposé un modèle de performance et analysé les résultats numériques grâce à l´utilitaire GreatSPN et WNSIM.
Prepare for Microsoft Exam 70-761?and help demonstrate your real-world mastery of SQL Server 2016 Transact-SQL data management, queries, and database programming. Designed for experienced IT professionals ready to advance their status, Exam Ref focuses on the critical-thinking and decision-making acumen needed for success at the MCSA level. Focus on the expertise measured by these objectives: ? Filter, sort, join, aggregate, and modify data ? Use subqueries, table expressions, grouping sets, and pivoting ? Query temporal and non-relational data, and output XML or JSON ? Create views, user-defined functions, and stored procedures ? Implement error handling, transactions, data types, and nulls This Microsoft Exam Ref: ? Organizes its coverage by exam objectives ? Features strategic, what-if scenarios to challenge you ? Assumes you have experience working with SQL Server as a database administrator, system engineer, or developer ? Includes downloadable sample database and code for SQL Server 2016 SP1 (or later) and Azure SQL Database