An Introduction to IMS: Your Complete Guide to IBM's Information Management System

An Introduction to IMS: Your Complete Guide to IBM's Information Management System

By: Robert Hain (author), Dean Meltz (author), Geoff Nicholls (author), Mark Harrington (author), Rick Long (author)Paperback

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The Only Up-to-the-Minute Guide to IMS Version 9--Straight from IBM IMS Experts * Introduces IMS, one of the world's premiere software products * Thoroughly covers key IMS functions, from security to Java support* For both new and experienced IMS administrators, programmers, architects, and managers* Prerequisite reading for IBM IMS Mastery Certificate Program IMS serves more than 95 percent of Fortune 1000 companies, manages 15,000,000 gigabytes of production data, and supports more than two hundred million users per day. The brand-new IBM IMS Version 9 is not just the world's #1 platform for very large online transaction processing: it integrates with Web application server technology to enable tomorrow's most powerful Web-based applications. Now, for the first time in many years, there's a completely up-to-date guide to understanding IMS in your business environment. An Introduction to IMS covers * Installing and configuring IMS Version 9* Understanding and implementing the IMS hierarchical database model* Understanding and working with the IMS Transaction Manager* Mastering core application programming concepts, including program structure and IMS control blocks* Taking advantage of IMS 9 Java programming enhancements* Working with the IMS Master Terminal* Administering IMS: system definition, customization, logging, security, operations, and more* Running IMS in a Parallel Sysplex(r) environment Whether you've spent a career running IMS or you are encountering IMS for the first time, this book delivers the insights and skills you need to succeed--as an application designer, developer, or administrator.

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About Author

Dean H. Meltz, team lead for IMS Information Development at IBM's Silicon Valley Lab, in San Jose, California, has been an IMS technical writer for seventeen years. Rick Long, IMS systems specialist with IBM's International Technical Support Organization (ITSO), writes about IMS and teaches IMS classes worldwide. He was previously an IMS systems programmer for IBM Global Services, Australia. Mark Harrington, IMS systems programmer at IBM Global Services, UK, has spent twenty-two years working with IBM mainframes as developer, application designer, installer, and DBA. Robert Hain has been an IMS systems programmer for seventeen years. He works for IBM Global Services, Melbourne, Australia, as part of the Telstra Alliance. Geoff Nicholls, a member of IBM's Worldwide IMS Technical Support Team, works with IMS customers throughout Australia and Asia.


Figures xiii Tables xvii Foreword xix Preface xxiii Acknowledgments xxv About the Authors xxvii Part I Overview of IMS 1 Chapter 1 IMS: Then and Now 3 History of IMS: Beginnings at NASA 3 Is IMS Still Strategic for Customers and IBM? 4 Chapter 2 Overview of the IMS Product 9 IMS Database Manager 10 IMS Transaction Manager 12 IMS System Services 13 IMS Documentation 13 Hardware and Software Requirements for IMS 13 Chapter 3 Accessing IMS 17 Accessing IMS from Application Programs 17 Accessing IMS from Other Products 22 Chapter 4 IMS and z/OS 27 How IMS Relates to z/OS 27 Structure of IMS Subsystems 28 Running an IMS System 43 Running Multiple IMS Systems 44 How IMS Uses z/OS Services 45 Chapter 5 Setting Up and Running IMS 49 Installing IMS 49 Defining an IMS System 51 IMS Startup 51 IMS Logging 54 IMS Utility Programs 54 IMS Recovery 55 IMS Shutdown 56 Part II IMS Database Manager 59 Chapter 6 Overview of the IMS Database Manager 61 Functions of the IMS Database Manager 61 Implementation of IMS Databases 62 Storing Data in IMS and DB2 UDB for z/OS 64 Storing XML Data in IMS 65 Chapter 7 Overview of the IMS Hierarchical Database Model 67 IMS Hierarchical Database Basics 68 Basic Segment Types 72 Sequence Fields and Access Paths 73 Chapter 8 Implementing the IMS Hierarchical Database Model 83 Segments, Records, and Pointers 84 IMS Hierarchical Access Methods 87 Operating System Access Methods 109 IMS Checkpoints 111 Locking Data 114 Chapter 9 Data Sharing 119 How Applications Share Data 120 DBRC and Data Sharing 121 Chapter 10 The Database Reorganization Process 123 Purpose of Database Reorganization 124 When to Reorganize Databases 124 Overview of the Database Reorganization Process 128 Chapter 11 The Database Recovery Process 151 Determining When Recovery Is Needed 151 Overview of the Database Recovery Process 152 IMS Backup and Recovery Utilities 153 Part III IMS Transaction Manager 167 Chapter 12 Overview of the IMS Transaction Manager 169 IMS TM Control Region 170 IMS TM Messages 171 IMS Transaction Flow 173 IMS TM Network Overview 175 The Data Communication Control (DCCTL) Environment 189 Operating an IMS Network 190 Chapter 13 How IMS TM Processes Input 195 Input Message Types 195 Terminal Types 197 Input Message Origin 197 Terminal Input Destination 197 Message Queuing 198 Message Scheduling 206 Transaction Scheduling 208 Part IV IMS Application Development 215 Chapter 14 Application Programming Overview 217 Java Programs 218 Application Program Structure 218 IMS Setup for Applications 230 IMS Application Programming Interfaces 235 IMS Application Calls 235 Accessing DB2 for z/OS Using a Resource Translation Table 237 IMS System Service Calls 237 Testing IMS Applications 239 Chapter 15 Application Programming for the IMS Database Manager 241 Introduction to Database Processing 241 Processing a Single Database Record 246 COBOL and PL/I Programming Considerations 261 Processing Databases with Logical Relationships 265 Processing Databases with Secondary Indexes 267 Loading Databases 269 Using Batch Checkpoint/Restart 275 Chapter 16 Application Programming for the IMS Transaction Manager 281 Application Program Processing 281 Transaction Manager Application Design 289 Chapter 17 Editing and Formatting Messages 297 Message Format Service 298 Basic Edit Function 308 Chapter 18 Application Programming in Java 311 Describing an IMS Database to the IMS Java Function 312 Supported SQL Keywords 313 Developing JMP Applications 314 Developing JBP Applications 315 Enterprise COBOL Interoperability with JMP and JBP Applications 316 Accessing DB2 UDB for z/OS Databases from JMP or JBP Applications 317 Developing Java Applications That Run Outside of IMS 317 XML Storage in IMS Databases 321 Part V IMS System Administration 327 Chapter 19 The IMS System Definition Process 329 Overview of the IMS System Definition Process 330 IMS System Definition Macros 335 The Extended Terminal Option (ETO) 338 Chapter 20 Customizing IMS 347 What You Can Customize 348 Naming the Routines 349 Changeable Interfaces and Control Blocks 349 IMS Standard User Exit Parameter List 349 Binding the Routines 349 Saving Registers 350 IMS Callable Services 350 Considering Performance 351 Summary of IMS Exit Routines 352 Chapter 21 IMS Security 361 History of IMS Security 361 Security Overview 361 Securing Resources 363 Chapter 22 IMS Logging 367 IMS System Checkpoints 367 Database Recovery Control Facility (DBRC) 368 IMS Log Components 368 Chapter 23 Database Recovery Control (DBRC) Facility 375 Overview of DBRC 376 DBRC Tasks 376 DBRC Components 377 When Should You Use DBRC? 378 Communicating with DBRC 379 DBRC Functions 381 Overview of the RECON Data Sets 395 Defining and Creating the RECON Data Sets 398 Initializing the RECON Data Sets 399 Allocating the RECON Data Sets to an IMS System 400 Maintaining the RECON Data Sets 401 Reorganizing RECON Data Sets 403 Recreating the RECON Data Sets 404 Summary of Recommendations for RECON Data Sets 404 Chapter 24 Operating IMS 405 Monitoring the System 405 Processing IMS System Log Information 406 Choosing Tools for Detailed Monitoring 413 Executing Recovery-Related Functions 419 Modifying and Controlling System Resources 421 Controlling Data Sharing 428 Controlling Log Data Set Characteristics 431 Connecting and Disconnecting Subsystems 436 Chapter 25 IMS System Recovery 439 Overview of Extended Recovery Facility (XRF) 440 Overview of Remote Site Recovery (RSR) 440 Comparison of XRF and RSR 441 Summary of When to Use XRF or RSR 442 Chapter 26 IBM IMS Tools 443 Database Administration Tools 443 Application Management Tools 447 Performance Management Tools 450 Recovery Management Tools 452 Information Integration Management Tools 455 Utilities Management Tools 456 TM Management Tools 461 Miscellaneous IMS Tools 463 Part VI IMS in a Parallel Sysplex Environment 465 Chapter 27 Introduction to Parallel Sysplex 467 Goals of a Sysplex Environment 468 IMS and the Sysplex Environment 469 Other Advantages of Running IMS TM in a Sysplex Environment 485 Chapter 28 IMSplexes 495 Components of an IMSplex 496 Requirements for an IMSplex 498 Operating an IMSplex 499 Part VII Appendixes 501 Appendix A Glossary 503 Appendix B Acronyms and Abbreviations Used in This Book 511 Appendix C Notices 517 Appendix D Bibliography 521 Index 525

Product Details

  • publication date: 30/12/2004
  • ISBN13: 9780132659529
  • Format: Paperback
  • Number Of Pages: 592
  • ID: 9780132659529
  • weight: 934
  • ISBN10: 0132659522

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