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Lund Performance Solutions


Introduction

Intact Dynamic Rollback Software

Most of us take for granted that the data we store in TurboIMAGE is safely tucked away, protected from physical or logical corruption. In reality, whenever you make use of a data storage scheme that maintains lists of related data entries, you run the risk of damaging these relationships and losing the data. The implications of making decisions based on unreliable information are far reaching. Intact Dynamic Rollback ensures database integrity.

Program Aborts and Partial Transactions

Aborts are serious problems

Even a single program failure can cause serious damage to your databases. When a program fails while a transaction is in progress, only part of the transaction will be applied to the database.
Programs can abort as a result of the following:
  • Bounds violations
  • Illegal ASCII digits
  • Stack overflows
  • Arithmetic errors
  • Modem line Dynamic Rollbackops
  • DS line Dynamic Rollbackops
  • The BREAK key
  • Image errors
  • Head crashes
  • Aborts of job from operator console for daily-backup
  • Aborts can result in partial transactions

    When a program aborts, the MPE termination software is called to close all files and databases and release any extra data segments back to the system. This causes the program to terminate, but incomplete transactions are not removed, so the databases are logically corrupt.

    Data Replication

    Intact Dynamic Rollback is a user-transparent system utility that maintains logical data integrity in TurboIMAGE/3000 databases after a program abort. When a program aborts, the MPE process that normally calls the termination software calls Intact Dynamic Rollback instead. Intact Dynamic Rollback determines whether any databases were opened by the aborted program, then, if needed, Intact Dynamic Rollback will rollback partial and/or complete transactions according to user specifications.

    Intact Dynamic Rollback is a real time solution

    Intact Dynamic Rollback is called automatically after any program abort, providing that program has been accessing an Intact Dynamic Rollback-enabled database. Because Intact Dynamic Rollback works online, it eliminates complicated and time-consuming recovery methods.
    References are made throughout this manual to Intact Dynamic Rollback’s automatic rollout of incomplete transactions after a program abort. You may assume, unless informed otherwise, that the aborted program was accessing a database previously enabled for rollback by Intact Dynamic Rollback.

    Intact Dynamic Rollback is a multi-purpose tool

    Intact Dynamic Rollback maintains logical data integrity
    Intact Dynamic Rollback ensures that the information in your databases is reliable after any program abort, so your business decisions are always based upon valid data.
    Intact Dynamic Rollback restarts jobs easily
    If a job aborts while updating a database, Intact Dynamic Rollback simply restreams the job after the cause of the program abort has been removed.
    Intact Dynamic Rollback is a programming and development tool
    Intact Dynamic Rollback’s DBUNDO intrinsic can be used in the development of applications involving databases.
  • Changes can be made directly to the database because any changes can be removed quickly and easily by DBUNDO. For example, a telephone order clerk can remove an order just entered by pressing the “UNDO” softkey (on screen).
  • Programmers will not have to worry about designing large buffers in their programs to contain all the information entered by a user.
  • Intact Dynamic Rollback is useful in a development environment on both test databases and life databases. It eliminates the need to do a DBRESTORE of the database at the end of a test. Simply specify a rollback to the last DBOPEN at the end of the test and your database will be restored to its original state and ready for the next test run. In addition, you can thoroughly test a program in the complex environment of a live system and be confident that Intact Dynamic Rollback will protect your work.

    Product Support

    Lund Performance Solutions Main Offices

    When you purchase support from Lund Performance Solutions, you benefit from the knowledge and experience of our technical support team. We are glad to help you interpret data and resolve performance issues. Our contracted product support entitles you to receive timely updates, bug fixes, documentation and direct technical support.
    Postal Address
    Lund Performance Solutions
    240 2nd Avenue SW
    Albany OR 97321 USA
    Internet URL
    Visit the Lund Performance Solutions website at http://www.lund.com/.
    Telephone Number
    For customer and technical support, call (541) 812-7600, Monday through Friday during the hours of 8:00 A.M., to 5:00 P.M., Pacific time, excluding holidays.
    Fax Number
    Transmit fax messages to (541) 812-7611.
    E-mail Addresses
    Send e-mail messages to:


  • Sales Team
  • info@lund.com
  • Technical Support Team
  • support@lund.com
  • Documentation Team
  • documentation@lund.com
  • Certified Trainers
  • lti@lund.com
  • Consulting Team
  • lcs@lund.com


    Lund Performance Solutions Sales Team

    Lund Performance Solutions’ professional sales team is available to answer your sales and customer support questions Monday through Friday during the hours 8:00 A.M., to 5:00 P.M., Pacific time, excluding major holidays.


    Please contact your sales representative for information about the latest Lund Performance Solutions products, the Lund Software Subscription Plan, upgrade options and prices, and more.

    Lund Performance Solutions Technical Support Team

    At Lund Performance Solutions, we are working hard to provide you with intuitive software products. Additionally, we try to provide superior online and printed documentation. However, should you find yourself with a technical question that you cannot answer with the tools provided, please contact our technical support team.


    NOTE You must be a registered user to access Lund Performance Solutions’ support services. Lund Performance Solutions’ support services are subject to Lund Performance Solutions’ prices, terms, and conditions in place at the time the services are used.


    E-mail Tech Support
    Ask questions and receive detailed answers from the technical support team by sending an e- mail message to support@lund.com. Please include the product serial number with your question. You will receive a reply by e-mail.
    Telephone Tech Support
    You can reach the technical support team by phone at (541) 812-7600, Monday through Friday during the hours 8:00 A.M., to 5:00 P.M., Pacific time, excluding major holidays. Emergency technical support is also available after hours, seven days a week.


    When you call, please be at your computer, have the product documentation in hand, and be prepared to provide the following information:
  • Product name and version number.
  • Type of computer hardware you are using.
  • Software version number of your operating system(s).
  • Exact wording of any messages that appear on your screen.
  • What you were doing when the problem occurred.
  • How you tried to solve the problem.
  • Lund Performance Solutions Documentation Team

    Lund Performance Solutions makes every effort to produce the highest quality documentation for our products, and we welcome your feedback. If you have comments or suggestions about our online Help or printed guides, send an e-mail message to documentation@lund.com or contact your account manager.

    Lund Training Institute Certified Trainers

    Lund Training Institute presents system performance training courses at their corporate training center in Oregon and at various locations across the United States and Canada throughout the year. The Certified Trainer Program is designed for trainers from all educational areas, including academia, consulting, and business.


    For information about Lund Training Institute or to receive an application, please review our website, send an e-mail message to lti@lund.com, or contact your account manager.

    Lund Consulting Services IT Consultants

    Lund Consulting Services, a division of Lund Performance Solutions, offers strategic IT solutions and expert support to a wide range of businesses. Our team of experienced IT professionals provides onsite consulting, training, and project management services to help businesses optimize their computer resources and achieve long-lasting success.


    For information about Lund Consulting Services, please review our website, send an e-mail message to lcs@lund.com, or contact your account manager.

    Product Documentation

    User’s Guide

    This document accompanies the De-Frag/X Disk Manager software as a guide for the new user and as a quick reference for experienced users. This guide assumes that you have a working knowledge of the MPE operating environment.

    Online Help System

    In the online Help system, you will find explanations of the many features of De-Frag/X Disk Manager as well as tips to guide you through the program’s basic functionality.

    Lund Performance Solutions
    www.lund.com
    Voice: (541) 812-7600
    Fax: (541) 81207611
    info@lund.com
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