DOCSLIB.ORG

IBM DB2: the Past, Present and Future

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
IBM DB2: the Past, Present and Future IBM DB2: The Past, Present & Future Future & Present Past, The DB2: IBM The launch of DB2 on June 7, 1983, marked the birth of relational database as a cornerstone for the enterprise; 30 years later, DB2 for z/OS is still the undisputed leader in the RDBMS market and the envy of its competitors when it comes to total system availability, scalability, security, reliability, and cost effectiveness. A majority of Fortune 500® companies, including the world’s top banks, retailers, and insurance providers, store mission-critical operational data in IBM® System z® and DB2® for z/OS®. Why? It seems everyone offers a marketing bundle “just like the mainframe,” and while some of these solutions have some basic capabilities, DB2 for z/OS and System z continue to lead the way with fresh capabilities to handle rapidly changing, diverse, and unpredictable workloads while maximizing resource utilization and investment. During 2013, IBM will celebrate the 30th anniversary of DB2 with customers, business partners, users, employees, and DB2 fans all around the world. We announced DB2 11 Early Support Program in October 2012, and we expect General Availability to follow shortly. This book is packed with rich information to help you manage your IT business systems. Don Haderle, the father of DB2, shares with us the history and growth of DB2, and customer testimonials highlight DB2 memories and milestones. Next, John Campbell provides a detailed overview on the planning stage of migrating to IBM DB2 10, and finally Terry Purcell provides a technical overview of the business benefits of IBM DB2 for z/OS Optimizer. We hope you enjoy this new book. Find out why DB2 is still growing after 30 years and how it is helping our customers to reduce costs and grow. Surekha Parekh World-Wide Marketing Program Director for DB2 for z/OS http://www.facebook.com/IBMDB2forzOS MC Press Online, LLC 3695 W. Quail Heights Court Boise, ID 83703-3861 5144 Price: $17.95 US/$19.95 CAN John Campbell Don Haderle Surekha Parekh Terry Purcell MC Press Online, LLC Boise, ID 83703 IBM DB2: The Past, Present and Future: 30 Years of Superior Innovation John Campbell, Don Haderle, Surekha Parekh, and Terry Purcell First Edition First Printing—October 2012 © 2012 IBM. All rights reserved. Every attempt has been made to provide correct information. However, the publisher and the author do not guarantee the accuracy of the book and do not assume responsibility for information included in or omitted from it. “The History and Growth of IBM’s DB2” is reprinted, with permission, from IEEE Annals of the History of Computing 34, no. 3 (July–September 2012). © 2012 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. The following terms are trademarks or registered trademarks of International Business Machines Corporation in the United States, other countries, or both: IBM, AS/400, CICS, DB2, DB2 Connect, Distributed Relational Database Architecture, DRDA, IBM Watson, IMS, Informix, InfoSphere, MVS, OMEGAMON, OS/390, QMF, Smarter Banking, Smarter Commerce, Smarter Planet, System/390, System z, System z9, Tivoli, WebSphere, z10, zEnterprise, and z/OS. Netezza is a registered trademark of IBM International Group B.V., an IBM Company. Intel is a registered trademark of Intel Corporation or its subsidiaries in the United States and other countries. Linux is a registered trademark of Linus Torvalds in the United States, other countries, or both. Microsoft and Windows are trademarks of Microsoft Corporation in the United States, other countries, or both. UNIX is a registered trademark of The Open Group in the United States and other countries. Java and all Java-based trademarks and logos are trademarks or registered trademarks of Oracle and/or its affiliates. Other company, product, or service names may be trademarks or service marks of others. Printed in Canada. All rights reserved. This publication is protected by copyright, and permission must be obtained from the publisher prior to any prohibited reproduction, storage in a retrieval system, or transmission in any form or by any means, electronic, mechanical, photocopying, recording, or likewise. MC Press offers excellent discounts on this book when ordered in quantity for bulk purchases or special sales. MC Press Online, LLC, 3695 W Quail Heights Court, Boise, ID 83703-3861 USA Customer Service: Toll Free: (877) 226-5394; [email protected] Permissions and Special Orders: [email protected] ISBN: 978-1-58347-378-8 About the Authors • iii About the Authors John Campbell ([email protected]) is an IBM® Distinguished Engineer reporting to the Director for z/OS® Development at the IBM Silicon Valley Lab. He has extensive experience of DB2® in terms of systems, database, and applications design. John specializes in design for high performance and data sharing. He is one of IBM’s foremost authorities for implementing high-end database/transaction- processing applications. Don Haderle ([email protected]) joined IBM in 1968 as a software developer and retired in 2005 as the software executive operating as Chief Technology Officer (CTO) for Information Management. He currently advises a couple of venture capitalists, sits on the technical advisory board for a number of companies (Aerospike, Palamida, Boardwalktech), and consults independently. Don is the father of commercial high-performance, industrial- strength relational database systems. For more than two decades, spanning 1977–1998, he was the technical leader and chief architect of DB2, IBM’s premier database management system. Haderle led DB2’s overall architecture and development, making key personal contributions to and holding fundamental patents in all key elements, including logging primitives, memory management, transaction fail-save and recovery techniques, query processing, data integrity, sorting, and indexing. Beyond his personal engineering contributions, as IBM CTO for Information Management, Haderle collaborated with researchers to establish and incubate new product directions for the information management industry, including federated DB, information integration (structured and unstructured data), and business document content management. Don was appointed IBM Fellow in 1989 and Vice President of Advanced Technology in 1991 with a worldwide team of researchers and developers. In 2000, he was appointed ACM Fellow in recognition of his impact on database technology. In 2008, Don was elected to the National Academy of Engineering for his contributions to the management of high-performance relational databases and leadership in founding the relational database-management industry. Don is a graduate of UC Berkeley, with a BA in Economics 1967. iv • IBM DB2: The Past, Present, & Future Surekha Parekh ([email protected]) is IBM’s World- Wide Marketing Program Director for DB2 for z/OS and also leads the Social Media Strategy for Information Management on System z. She is responsible for market strategy and planning of DB2 on System z® and building social media communities for Informa- tion Management System z. Based in Warwick, United Kingdom, Surekha is a passionate marketer with proven results. She has over 25 years of business experience, and she is also passionate about Information Management. Surekha represents IBM on the IDUG committee. IDUG is an independent DB2 user group with more than 16,000 members in more than 100 countries. Terry Purcell ([email protected]) is a Senior Technical Staff Member with the IBM Silicon Valley Lab, where he is lead designer for the DB2 for z/OS Optimizer. Terry has two decades of experience with DB2 in database administration and application development as a customer, consultant, and DB2 developer. Table of Contents • v Contents About the Authors ...........................................................................................................iii Foreword by Don Haderle..............................................................................................vii Introduction by Surekha Parekh ....................................................................................ix 30 Years of Innovation ....................................................................................................xi The Vision of DB2 .........................................................................................................xix The History and Growth of IBM’s DB2 by Donald J. Haderle and Cynthia M. Saracco ..........................................................1 Abstract .......................................................................................................................1 Database Management in the 1970s ............................................................................2 The DB2 Decision for Mainframe ..............................................................................2 Stage 1: Development and Delivery of DB2 Version 1 ..............................................3 Stage 2: “Ready for Prime Time”................................................................................8 Stage 3: Availability, Performance, and Distributed Databases ................................ 11 Stage 4: Sysplex and Open Systems .........................................................................13
Load more

Recommended publications
  • Cloud Enabling CICS
    Front cover Cloud Enabling IBM CICS Discover how to quickly cloud enable a traditional IBM 3270-COBOL-VSAM application Use CICS Explorer to develop and deploy a multi-versioned application Understand the benefits of threshold policy Rufus Credle Isabel Arnold Andrew Bates Michael Baylis Pradeep Gohil Christopher Hodgins Daniel Millwood Ian J Mitchell Catherine Moxey Geoffrey Pirie Inderpal Singh Stewart Smith Matthew Webster ibm.com/redbooks International Technical Support Organization Cloud Enabling IBM CICS December 2014 SG24-8114-00 Note: Before using this information and the product it supports, read the information in “Notices” on page vii. First Edition (December 2014) This edition applies to CICS Transaction Server for z/OS version 5.1, 3270-COBOL-VSAM application. © Copyright International Business Machines Corporation 2014. All rights reserved. Note to U.S. Government Users Restricted Rights -- Use, duplication or disclosure restricted by GSA ADP Schedule Contract with IBM Corp. Contents Notices . vii Trademarks . viii IBM Redbooks promotions . ix Preface . xi Authors. xii Now you can become a published author, too! . .xv Comments welcome. .xv Stay connected to IBM Redbooks . xvi Part 1. Introduction . 1 Chapter 1. Cloud enabling your CICS TS applications . 3 1.1 Did you know?. 4 1.2 Business value . 4 1.3 Solution overview . 5 1.4 Cloud computing in a CICS TS context. 6 1.5 Overview of the cloud-enabling technologies in CICS TS V5 . 11 1.5.1 Platform overview . 12 1.5.2 Application overview . 13 Chapter 2. GENAPP introduction. 15 2.1 CICS TS topology . 16 2.2 Application architecture. 17 2.2.1 GENAPP in a single managed region.
    [Show full text]
  • Oracle Database Gateway for Adabas User's Guide, 11G Release 2 (11.2) E12074-01
    Oracle® Database Gateway for Adabas User’s Guide 11g Release 2 (11.2) E12074-01 July 2009 Oracle Database Gateway for Adabas User's Guide, 11g Release 2 (11.2) E12074-01 Copyright © 2008, 2009, Oracle and/or its affiliates. All rights reserved. Primary Author: Jeanne Wiegelmann Contributing Author: Maitreyee Chaliha, Sami Zeitoun, Oussama Mkaabal Contributor: Vira Goorah, Peter Wong This software and related documentation are provided under a license agreement containing restrictions on use and disclosure and are protected by intellectual property laws. Except as expressly permitted in your license agreement or allowed by law, you may not use, copy, reproduce, translate, broadcast, modify, license, transmit, distribute, exhibit, perform, publish, or display any part, in any form, or by any means. Reverse engineering, disassembly, or decompilation of this software, unless required by law for interoperability, is prohibited. The information contained herein is subject to change without notice and is not warranted to be error-free. If you find any errors, please report them to us in writing. If this software or related documentation is delivered to the U.S. Government or anyone licensing it on behalf of the U.S. Government, the following notice is applicable: U.S. GOVERNMENT RIGHTS Programs, software, databases, and related documentation and technical data delivered to U.S. Government customers are "commercial computer software" or "commercial technical data" pursuant to the applicable Federal Acquisition Regulation and agency-specific supplemental regulations. As such, the use, duplication, disclosure, modification, and adaptation shall be subject to the restrictions and license terms set forth in the applicable Government contract, and, to the extent applicable by the terms of the Government contract, the additional rights set forth in FAR 52.227-19, Commercial Computer Software License (December 2007).
    [Show full text]
  • Netezza EOL: IBM IAS Is a Flawed Upgrade Path Netezza EOL: IBM IAS Is a Flawed Upgrade Path
    Author: Marc Staimer WHITE PAPER Netezza EOL: What You’re Not Being Told About IBM IAS Is a Flawed Upgrade Path Database as a Service (DBaaS) WHITE PAPER • Netezza EOL: IBM IAS Is a Flawed Upgrade Path Netezza EOL: IBM IAS Is a Flawed Upgrade Path Executive Summary It is a common technology vendor fallacy to compare their systems with their competitors by focusing on the features, functions, and specifications they have, but the other guy doesn’t. Vendors ignore the opposite while touting hardware specs that mean little. It doesn’t matter if those features, functions, and specifications provide anything meaningfully empirical to the business applications that rely on the system. It only matters if it demonstrates an advantage on paper. This is called specsmanship. It’s similar to starting an argument with proof points. The specs, features, and functions are proof points that the system can solve specific operational problems. They are the “what” that solves the problem or problems. They mean nothing by themselves. Specsmanship is defined by Wikipedia as: “inappropriate use of specifications or measurement results to establish supposed superiority of one entity over another, generally when no such superiority exists.” It’s the frequent ineffective sales process utilized by IBM. A textbook example of this is IBM’s attempt to move their Netezza users to the IBM Integrated Analytics System (IIAS). IBM is compelling their users to move away from Netezza. In the fall of 2017, IBM announced to the Enzee community (Netezza users) that they can no longer purchase or upgrade PureData System for Analytics (the most recent IBM name for its Netezza appliances), and it will end-of-life all support next year.
    [Show full text]
  • SAP Database Administration with IBM
    André Faustmann, Michael Greulich, André Siegling, Benjamin Wegner, and Ronny Zimmerman SAP® Database Administration with IBM® DB2® Bonn Boston Contents at a Glance 1 Introduction ............................................................................ 19 2 SAP System Landscapes ......................................................... 25 3 Basics and Architecture of the IBM DB2 for LUW Database ................................................................................. 71 4 Lifecycle ................................................................................. 233 5 Administration Tools Inside and Outside the SAP System .... 327 6 Backup, Restore, and Recovery .............................................. 463 7 Monitoring DB2 SAP Systems with SAP Solution Manager .................................................................................. 575 8 SAP NetWeaver Business Warehouse and IBM DB2 for LUW .................................................................................. 647 9 Common Problems and Their Solutions for DB2 Administrators ........................................................................ 697 Contents Foreword .................................................................................... 15 Acknowledgments ....................................................................... 17 1 Introduction ................................................................. 19 1.1 Who This Book Is For .................................................... 21 1.2 Focus of This Book .......................................................
    [Show full text]
  • Paper Mainframe
    Club des Responsables d’Infrastructures et de Production IT Infrastructure and Operations IT INFRAsTRucTuRE & Operations MANAgEMENT Best Practices PAPER MAINFRAME IBM zSeries Mainframe Cost Control te i Authors Laurent Buscaylet, Frédéric Didier Bernard Dietisheim, Bruno Koch, Fabrice Vallet sponsored by september 2012 Wh PAgE 2 table of contents INTRODucTION 5 1. “z” POsITIONINg AND Strategy wIThIN A Company 6 1.1 Role of the Mainframe in the eyes of cRIP’s Members 6 1.2 The Position of system z vs. Distributed systems (windows, uNIX, Linux) 6 1.3 system z - Banking/Finance/Insurance vs. general Industry sectors 7 1.4 Evolution strategies for system z 9 2. z Platform OVERVIEw 11 2.1 Technical terms of reference 11 2.1.1 Servers 11 2.1.2 SAN & Networks 12 2.1.3 Storage 13 2.1.4 Backups 15 2.1.5 technical Architecture & Organization 16 2.1.6 Business Continuity 19 2.2 Mainframe software vendors (IsV’s) analysis & positioning 20 2.2.1 the Main Suppliers (ISV’s) 22 2.2.2 the Secondary Suppliers (ISV’s) 22 2.3 survey Results 3. z PLATFORM cOsT cONTROL 28 3.1 controling software cost 28 3.1.1 IBM Contractual Arrangements 28 3.1.2 ISV negotiation strategies: holistic/generic or piecemeal/ad-hoc 31 3.1.3 ISV contractual arrangements: licensing modes & billing 35 3.1.4 MLC: Controlling the billing level 38 3.1.4.1 The IBM billing method 38 3.1.4.2 The problem of smoothing (consolidating) peak loads 41 3.1.4.3 The methods and controls for controlling the software invoice 42 3.1.4.4 Survey feedback and recommendations 43 3.1.4.5 Other Cost Saving Options 48 3.2 Infrastructure cost Reduction 50 3.2.1 Grouping and Sharing Infrastructure 50 3.2.2 Use of specialty engines: zIIP, zAAP, IFL 54 3.3 controlling operational costs 55 3.3.1 Optimization, performance & technical/application component quality 55 3.3.2 Capacity Management, tools & methods 58 4.
    [Show full text]
  • Fortran Reference Guide
    FORTRAN REFERENCE GUIDE Version 2018 TABLE OF CONTENTS Preface............................................................................................................ xv Audience Description......................................................................................... xv Compatibility and Conformance to Standards............................................................ xv Organization................................................................................................... xvi Hardware and Software Constraints...................................................................... xvii Conventions................................................................................................... xvii Related Publications........................................................................................ xviii Chapter 1. Language Overview............................................................................... 1 1.1. Elements of a Fortran Program Unit.................................................................. 1 1.1.1. Fortran Statements................................................................................. 1 1.1.2. Free and Fixed Source............................................................................. 2 1.1.3. Statement Ordering................................................................................. 2 1.2. The Fortran Character Set.............................................................................. 3 1.3. Free Form Formatting..................................................................................
    [Show full text]
  • SPSS to Orthosim File Conversion Utility Helpfile V.1.4
    SPSS to Orthosim File Conversion Utility Helpfile v.1.4 Paul Barrett Advanced Projects R&D Ltd. Auckland New Zealand email: [email protected] Web: www.pbarrett.net 30th December, 2019 Contents 3 Table of Contents Part I Introduction 5 1 Installation Details ................................................................................................................................... 7 2 Extracting Matrices from SPSS - Cut and Paste ................................................................................................................................... 8 3 Extracting Matrices from SPSS: Orthogonal Factors - E.x..c..e..l. .E..x..p..o..r.t................................................................................................................. 17 4 Extracting Matrices from SPSS: Oblique Factors - Exce.l. .E..x..p..o..r..t...................................................................................................................... 24 5 Creating Orthogonal Factor Orthosim Files ................................................................................................................................... 32 6 Creating Oblique Factor Orthosim Files ................................................................................................................................... 41 3 Paul Barrett Part I 6 SPSS to Orthosim File Conversion Utility Helpfile v.1.4 1 Introduction SPSS-to-Orthosim converts SPSS 11/12/13/14 factor loading and factor correlation matrices into the fixed-format .vf (simple ASCII text) files
    [Show full text]
  • IBM DB2 for Z/OS: the Database for Gaining a Competitive Advantage!
    Why You Should Read This Book Tom Ramey, Director, DB2 for z/OS IBM Silicon Valley Laboratory “This book is a ‘must read’ for Enterprise customers and contains a wealth of valuable information! “It is clear that there is a technology paradigm shift underway, and this is opening enormous opportunities for companies in all industries. Adoption of Cloud, Mobile, and Analytics promises to revolutionize the way we do business and will add value to a company’s business processes across all functions from sales, marketing, procurement, manufacturing and finance. “IT will play a significant role enabling this shift. Read this book and find out how to integrate the heart of your infrastructure, DB2 for z/OS, with new technologies in order to maximize your investment and drive new value for your customers.” Located at IBM’s Silicon Valley Laboratory, Tom is the director of IBM’s premiere relational database management system. His responsibilities include Architecture, Development, Service, and Customer Support for DB2. He leads development labs in the United States, Germany, and China. Tom works closely with IBM’s largest clients to ensure that DB2 for z/OS continues as the leading solution for modern applications, encompassing OLTP to mobile to analytics. At the same time he continues an uncompromising focus on meeting the needs of the most demanding operational environments on Earth, through DB2’s industry- leading performance, availability, scaling, and security capabilities. IBM DB2 for z/OS: The Database for Gaining a Competitive Advantage! Shantan Kethireddy Jane Man Surekha Parekh Pallavi Priyadarshini Maryela Weihrauch MC Press Online, LLC Boise, ID 83703 USA IBM DB2 for z/OS: The Database for Gaining a Competitive Advantage! Shantan Kethireddy, Jane Man, Surekha Parekh, Pallavi Priyadarshini, and Maryela Weihrauch First Edition First Printing—October 2015 © Copyright 2015 IBM.
    [Show full text]
  • ILE C/C++ Programmer's Guide
    IBM i 7.2 Programming IBM Rational Development Studio for i ILE C/C++ Programmer's Guide IBM SC09-2712-07 Note Before using this information and the product it supports, read the information in “Notices” on page 441. This edition applies to version 7, release 2, modification 0 of IBM Rational Development Studio for i (product number 5770-WDS) and to all subsequent releases and modifications until otherwise indicated in new editions. This version does not run on all reduced instruction set computer (RISC) models nor does it run on CISC models. This document may contain references to Licensed Internal Code. Licensed Internal Code is Machine Code and is licensed to you under the terms of the IBM License Agreement for Machine Code. © Copyright International Business Machines Corporation 1993, 2013. US Government Users Restricted Rights – Use, duplication or disclosure restricted by GSA ADP Schedule Contract with IBM Corp. Contents ILE C/C++ Programmer’s Guide..............................................................................1 PDF file for ILE C/C++ Programmer’s Guide............................................................................................... 3 About ILE C/C++ Programmer's Guide........................................................................................................5 Install Licensed Program Information................................................................................................... 5 Notes About Examples..........................................................................................................................
    [Show full text]
  • Developing Embedded SQL Applications
    IBM DB2 10.1 for Linux, UNIX, and Windows Developing Embedded SQL Applications SC27-3874-00 IBM DB2 10.1 for Linux, UNIX, and Windows Developing Embedded SQL Applications SC27-3874-00 Note Before using this information and the product it supports, read the general information under Appendix B, “Notices,” on page 209. Edition Notice This document contains proprietary information of IBM. It is provided under a license agreement and is protected by copyright law. The information contained in this publication does not include any product warranties, and any statements provided in this manual should not be interpreted as such. You can order IBM publications online or through your local IBM representative. v To order publications online, go to the IBM Publications Center at http://www.ibm.com/shop/publications/ order v To find your local IBM representative, go to the IBM Directory of Worldwide Contacts at http://www.ibm.com/ planetwide/ To order DB2 publications from DB2 Marketing and Sales in the United States or Canada, call 1-800-IBM-4YOU (426-4968). When you send information to IBM, you grant IBM a nonexclusive right to use or distribute the information in any way it believes appropriate without incurring any obligation to you. © Copyright IBM Corporation 1993, 2012. US Government Users Restricted Rights – Use, duplication or disclosure restricted by GSA ADP Schedule Contract with IBM Corp. Contents Chapter 1. Introduction to embedded Include files for COBOL embedded SQL SQL................1 applications .............29 Embedding SQL statements
    [Show full text]
  • Proceedings of the Rexx Symposium for Developers and Users
    SLAC-R-95-464 CONF-9505198-- PROCEEDINGS OF THE REXX SYMPOSIUM FOR DEVELOPERS AND USERS May 1-3,1995 Stanford, California Convened by STANFORD LINEAR ACCELERATOR CENTER STANFORD UNIVERSITY, STANFORD, CALIFORNIA 94309 Program Committee Cathie Dager of SLAC, Convener Forrest Garnett of IBM Pam Taylor of The Workstation Group James Weissman Prepared for the Department of Energy under Contract number DE-AC03-76SF00515 Printed in the United States of America. Available from the National Technical Information Service, U.S. Department of Commerce, 5285 Port Royal Road, Springfield, Virginia 22161. DISTRIBUTION OF THIS DOCUMENT IS UNLIMITED ;--. i*-„r> ->&• DISCLAIMER This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, make any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof. DISCLAIMER Portions
    [Show full text]
  • 13347 CICS Introduction and Overview
    CICS Introduction and Overview Ezriel Gross Circle Software Incorporated August 13th, 2013 (Tue) 4:30pm – 5:30pm Session 13347 Agenda What is CICS and Who Uses It Pseudo Conversational Programming CICS Application Services CICS Connectivity CICS Resource Definitions CICS Supplied Transactions CICS Web Services CICS The Product What is CICS? CICS is an online transaction processing system. Middleware between the operating system and business applications. Manages the user interface. Retrieves and modifies data. Handles the communication. CICS Customers Banks Mortgage Account Reconciliations Payroll Brokerage Houses Stock Trading Trade Clearing Human Resources Insurance Companies Policy Administration Accounts Receivables Claims Processing Batch Versus Online Programs The two ways to process input are batch and online. Batch requests are saved then processed sequentially. After all requests are processed the results are transmitted. Used for order entry processing such as warehouse applications. Online requests are received randomly and processed immediately. Results are transmitted as soon as they are available. Response time tends to be sub-second. Used for applications – such as: Credit Card Authorization. Transaction Processing Requirements Large volume of business transactions to be rapidly and accurately processed Multiple users, single/sysplex or distributed With potentially: – A huge number of users – Simultaneous access to data – A large volume of data residing in multiple database types – Intense security and data integrity controls necessary The access to the data is such that: – Each user has the perception of being the sole user of the system – A set of changes is guaranteed to be logically consistent. If a failure occurs, any intermediate results are undone before the system becomes available again – A completed set of changes is immediately visible to other users A Business Transaction A transaction has a 4-character id.
    [Show full text]