IBM's Definitive One-Stop Guide to IMS Versions 12, 11, and 10: for Every IMS DBA, Developer, and System Programmer
Over 90% of the top Fortune® 1000 companies rely on IBM's Information Management System (IMS) for their most critical IBM System z® data management needs: 50,000,000,000+ transactions run through IMS databases every day. What's more, IBM continues to upgrade IMS: Versions 12, 11, and 10 meet today's business challenges more flexibly and at a lower cost than ever before. In An Introduction to IMS, Second Edition, leading IBM experts present the definitive technical introduction to these versions of IMS.
More than a complete tutorial, this book provides up-to-date examples, cases, problems, solutions, and a complete glossary of IMS terminology. Prerequisite reading for the current IBM IMS Mastery Certification Program, it reflects major recent enhancements such as dynamic information generation; new access, interoperability and development tools; improved SOA support; and much more. Whether you're a DBA, database developer, or system programmer, it brings together all the knowledge you'll need to succeed with IMS in today's mission critical environments.
Coverage includes
- What IMS is, how it works, how it has evolved, and how it fits into modern enterprise IT architectures
- Providing secure access to IMS via IMS-managed application programs
- Understanding how IMS and z/OS® work together to use hardware and software more efficiently
- Setting up, running, and maintaining IMS
- Running IMS Database Manager: using the IMS Hierarchical Database Model, sharing data, and reorganizing databases
- Understanding, utilizing, and optimizing IMS Transaction Manager
- IMS application development: application programming for the IMS Database and IMS Transaction Managers, editing and formatting messages, and programming applications in Java(TM)
- IMS system administration: the IMS system definition process, customizing IMS, security, logging, IMS operations, database and system recovery, and more
- IMS in Parallel Sysplex® environments: ensuring high availability, providing adequate capacity, and balancing workloads
Autorentext
Barbara Klein, responsible for the strategy and introduction of new IMS capabilities, has held various positions in IBM Planning, Design, Development, Assurance, Systems Engineering, Marketing, and Management.
Richard Alan Long, IMS Development Level 2 Database Support Team member since 2002, began with IMS in the late 1970s working in various programming and database administration roles.
Kenneth Ray Blackman, IBM Certified IT Specialist - IMS Advanced Technical Skills, consults on IMS connectivity, IMS application modernization and System z integration architectures, and presents IMS topics at technical conferences and seminars.
Diane Lynne Goff, IBM IMS Advanced Technical Skills Senior I/T Specialist, has presented IMS topics at technical conferences and seminars, worked with IMS customers, and provided System z hardware and software support.
Stephen P. Nathan has 38 years of experience as an IMS developer, application analyst, DBA, systems programmer, and performance tuner. He has worked for IBM in IMS Level 2 Support since 2003.
Moira McFadden Lanyi has been the Technical Editor, Terminologist, and Information Architect for the IMS Information Development team since 2003, and has also worked as a Visual Designer and Project Manager at IBM.
Margaret M. Wilson, now retired from IBM, spent more than 20 years of her IBM career working with IMS and IMS Tools, testing IMS software, teaching IMS basics, and marketing IMS Tools.
John Butterweck, IBM Worldwide IMS Technical Support Team member, specializes in assisting customers with IMS installation and maintenance.
Sandra L. Sherrill, IMS Worldwide Market Manager, has spent more than 20 years working on IMS teams.
Inhalt
Acknowledgments xxv
About the Authors xxvi
Preface xxvii
Part I: Overview of IMS
Chapter 1 IMS: From Apollo to Enterprise 1
IMS and the Apollo Program 1
IMS as a Database Management System 2
IMS as a Transaction Manager 2
Who Uses IMS? 3
IMS and Enterprise Integration 4
Chapter 2 Overview of the IMS Product 5
IMS Database Manager 6
IMS Transaction Manager 8
IMS System Services 9
IMS Product Documentation 9
Hardware and Software Requirements for IMS 10
Hardware 10
Software 10
Chapter 3 Access to and from IMS 13
IMS-Managed Application Program Access 13
Accessing IMS by Using DL/I Calls 14
Accessing IMS TM 14
IMS Connect 16
Accessing IMS DB Using JDBC 16
Accessing IMS from Other Application Runtime Environments 19
Accessing IMS DB 19
Accessing IMS TM 20
Access to and from IMS Using the IMS SOA Integration Suite Components 20
IMS Enterprise Suite Connect APIs 22
IMS Enterprise Suite SOAP Gateway 22
IMS TM Resource Adapter 24
IMS MFS Web Enablement 25
MFS SOA Support 27
IMS Solutions for Java Development 27
IMS Enterprise Suite DLIModel Utility Plug-In 27
IMS Enterprise Suite Explorer for Development 27
IMS XML DB 29
IMS Web 2.0 Solutions for IMS DB and IMS TM 29
Accessing from IMS 30
Accessing to and from IMS 32
Chapter 4 IMS and z/OS 33
How IMS Relates to z/OS 33
Structure of IMS Subsystems 33
IMS Control Region 34
IMS Environments 34
IMS Separate Address Spaces 41
Internal Resource Lock Manager 48
IMS Connect 48
Advanced Program-to-Program Communications 48
Running an IMS System 49
Running Multiple IMS Systems 49
Running Multiple IMS Systems on a Single z/OS Image 49
Running Multiple IMS Systems on Multiple z/OS Images 50
How IMS Uses z/OS Services 50
Resource Access Control Facility 51
Resource Recovery Services 51
Parallel Sysplex 52
Cross-System Coupling Facility 52
Cross-System Extended Services 53
Automatic Restart Management 53
Chapter 5 Setting Up, Running, and Maintaining IMS 55
Installing IMS 55
Installing IMS Using SMP/E 56
IMS Installation Verification Program 56
Defining an IMS System 57
IMS Startup 57
Types of IMS System Starts 57
Starting Regions That Are Related to IMS 58
IMS Logging 60
IMS Utility Programs 60
IMS Recovery 60
Extended Recovery Facility 60
Remote Site Recovery 61
Database Recovery Control Facility 61
Fast Database Recovery 61
IMS Database Recovery Facility for z/OS 61
IMS Shutdown 61
Maintaining an IMS System 62
Part II: IMS Database Manager
Chapter 6 Overview of the IMS Database Manager 63
IMS Database Manager Overview 63
Implementation of IMS Databases 64
Overview of Full-Function Databases 64
Overview of Fast Path DEDBs 64
Full-Function Databases 65
Fast Path Data Entry Databases 66
Storing Data in IMS and DB2 for z/OS 66
Storing XML Data in IMS 67
Open Database Manager 67
Workload Routing and Distribution 71
Chapter 7 Overview of the IMS Hierarchical Database Model 75
IMS Hierarchical Database Basics 76
Basic Segment Types 79
Sequence Fields and Access Paths 80
Logical Relationships 81
Secondary Indexes 81
Logical Relationships 81
Secondary Index Databases 85
Chap…