Introduction to IMS, An: Your Complete Guide to IBM Information Management System, 2nd Edition

ByBarbara Klein,Rick Long,Kenneth Ray Blackman,Diane Lynne Goff,Stephen P. Nathan,Moira McFadden Lanyi,Margaret M. Wilson,John Butterweck,Sandra L. Sherrill
Published Nov 18, 2011 byIBM Press.

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Description
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Description

Copyright 2012
Dimensions: 7" x 9-1/8"
Pages: 624
Edition: 2nd

eBook (Watermarked)
是BN-10: 0-13-288696-0
是BN-13: 978-0-13-288696-3

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. InAn Introduction to IMS, Second Edition, leading IBM experts present the definitive technical introduction to these versions of IMS.

超过一个完整的教程,这本书提供了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™
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

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Sample Content

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

访问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

概述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

Chapter 8 Implementing the IMS Hierarchical Database Model 89

Segments, Records, and Pointers 90

Physical Segment Design 91

IMS Hierarchical Access Methods 93

HDAM Access Method 95

HIDAM Access Method 100

PHDAM and PHIDAM Access Methods 103

Index Databases 106

Fast Path DEDBs 106

GSAM Access Method 112

HSAM and HISAM Access Methods 112

Operating System Access Methods 113

Data Set Groups 114

Choosing Between VSAM and OSAM for Data Set Groups 115

IMS Checkpoints 116

Application Program Checkpoints 116

Locking Data 118

DB2 and Deadlocks 119

Methods of Sharing Data 120

Chapter 9 Data Sharing 123

How Applications Share Data 124

DBRC and Data Sharing 125

Chapter 10 The Database Reorganization Process 127

Purpose of Database Reorganization 128

When to Reorganize Databases 128

Reactive Reorganizing 128

Proactive Reorganization 129

Monitoring the Database 130

Sample Reorganization Guidelines 130

Overview of the Database Reorganization Process 132

Reorganizing HALDBs 132

Offline Reorganization 132

Online Reorganization 146

Chapter 11 The Database Recovery Process 153

Determining When Recovery Is Needed 153

Overview of the Database Recovery Process 154

Online Programs and Recovery 155

DB Batch Update Programs and Recovery 155

IMS Backup and Recovery Utilities 155

Database Image Copy Utility 156

Database Image Copy 2 Utility 158

Online Database Image Copy Utility 159

Database Change Accumulation Utility 159

数据库恢复实用工具161

Batch Backout Utility 164

Part III: IMS Transaction Manager

Chapter 12 Overview of the IMS Transaction Manager 167

IMS TM Control Region 169

Data Communications Control Environment 169

IMS TM Network Overview 170

Required IMS TM Network Components 173

Optional IMS TM Network Components 173

Terminal Types 174

Static 174

Dynamic 174

Extended Terminal Option 174

APPC/IMS 175

APPC/IMS Application Programming Interfaces 175

MSC and ISC 176

Multiple Systems Coupling 176

Intersystem Communication 177

Comparing the Functions of MSC and ISC 178

Input Message Types 179

Input Destination 179

Message Format Service 180

Message Queuing 180

Message Queue Size and Performance Considerations 182

Multiple Message Queue Data Sets 182

Fast Path Transactions and Message Queues 183

Shared Queues 183

Operating an IMS Network 188

Master Terminal 189

Initiating a Session with IMS 192

Open Transaction Manager Access 193

OTMA Asynchronous Output 194

OTMA Security 196

OTMA Callable Interface 197

IMS Connect 198

IMS Connect OTMA Interface 199

IMS TM Resource Adapter 204

IMS Connect APIs 205

Workload Routing with the IMS Connect OTMA Interface 205

Workload Balancing with the Sysplex Distributor 205

Ports 207

Connection Types and Considerations 207

IMS Connect Load Balancing and Routing 208

Asynchronous Output and Supermember Support 210

IMS Connect Operations Manager Interface 213

IMS-to-IMS Connections over TCP/IP 213

WebSphere MQ 214

Using the WebSphere MQ API in IMS Dependent Regions 214

IMS BMP Trigger Monitor 216

WebSphere MQ IMS Bridge 216

Chapter 13 How IMS TM Processes Input 223

IMS TM Messages 223

IMS Message Format 225

Input Message Origin 226

Transaction Scheduling 226

Message Region Scheduling 226

Scheduling Conditions 228

Program and Transaction Definitions That Affect Scheduling 229

Definition Parameters That Affect Transaction Scheduling 230

Defining the Class of a Transaction 230

Defining the Priority of a Transaction 231

Processing Limit Count and Time 232

Parallel Scheduling 232

Database Processing Intent 233

Scheduling a BMP or JBP Application 233

Scheduling Fast Path Transactions 234

Fast Path-Exclusive and Fast Path-Potential Transactions 234

Scheduling in a Shared-Queues Environment 235

IMS Transaction Flow 235

OTMA Message Processing 236

Commit Mode 0 (CM0): Commit-Then-Send 236

Commit Mode 1 (CM1): Send-Then-Commit 236

Synclevel 0 (SL0): None 236

Synclevel 1 (SL1): Confirm 238

Synclevel 2 (SL2): Syncpoint 238

Synchronous Callout 239

IMS Connect Implementation of Synchronous Callout 240

Transaction Expiration 242

Part IV: IMS Application Development

Chapter 14 Application Programming Overview 243

Application Program Structure 244

An ENTRY Statement 245

A PCB or AIB 246

Some DL/I Calls 246

A Status Code Processing Section 246

A Termination Statement 246

Entry to the Application Program 246

PCB Mask 247

AIB Mask 252

Calls to IMS 254

Status Code Processing 255

Application End of Processing 256

IMS Setup for Applications 257

IMS Control Blocks 257

IMS System Definition 259

IMS Application Programming Interfaces 261

IMS Application Calls 261

Get Unique (GU) 261

Get Next (GN) 261

Get Hold Unique (GHU) and Get Hold Next (GHN) 261

Insert (ISRT) 262

Delete (DLET) 262

Replace (REPL) 262

ICAL Call 262

IMS System Service Calls 262

Testing IMS Applications 264

第15章应用课题amming for the IMS Database Manager 267

Introduction to Database Processing 267

Application Programming Interfaces to IMS 268

Processing a Single Database Record 273

IMS Database Positioning 274

Retrieving Segments 275

Updating Segments 279

Calls with Command Codes 283

Database Positioning After DL/I Calls 286

Using Multiple PCBs for One Database 287

处理GSAM数据库287

COBOL and PL/I Programming Considerations 289

COBOL Programming Considerations 289

PL/I Programming Considerations 291

Processing Databases with Logical Relationships 293

Accessing a Logical Child in a Physical Database 293

Accessing Segments in a Logical Database 293

Processing Databases with Secondary Indexes 294

Accessing Segments by Using a Secondary Index 295

Creating Secondary Indexes 297

Loading Databases 297

Overview of Loading Databases 297

Loading a Database That Has Logical Relationships 298

Loading a Database That Has Secondary Indexes 300

Using Batch Checkpoint/Restart 300

Using the Restart Call 303

Using the Checkpoint Call 305

Chapter 16 Application Programming for the IMS Transaction Manager 309

Application Program Processing 309

Role of the PSB 311

DL/I Message Calls 312

Message Segments 312

Conversational Processing 312

Output Message Processing 312

Message Switching 313

Callout Requests for External Services or Data 313

Application Program Termination 313

Logging and Checkpoint/Restart Processing 314

Program Isolation and Dynamic Logging 314

Transaction Manager Application Design 314

Online Transaction Processing Concepts 315

Online Program Design 317

Basic Screen Design 318

一般IMS TM Application Design Guidelines 320

Chapter 17 Editing and Formatting Messages 321

Message Format Service 321

MFS Components 323

Administering MFS 327

MFS Control Blocks 329

Advantages of Using MFS 331

Basic Edit Function 332

Chapter 18 Application Programming in Java 335

IMS Universal Drivers Overview 336

IMS Database Java Metadata 337

Supported SQL Keywords 340

Variable-Length Segment Support 340

Virtual Foreign Key Fields 341

IMS Support for the JVM Runtime Environment 341

Developing JMP Applications 341

JMP Applications and Conversational Transactions 344

Developing JBP Applications 344

Issuing Synchronous Callout Requests from a Java Dependent Region 346

Enterprise COBOL Interoperability with JMP and JBP Applications 346

Accessing DB2 for z/OS Databases from JMP or JBP Applications 347

Java Interoperability with MPP, IFP, and BMP Applications 348

Distributed Connectivity with the IMS Universal Drivers 348

WebSphere Application Server for z/OS Applications 349

DB2 for z/OS Stored Procedures 349

CICS Applications 349

XML Storage in IMS Databases 351

Decomposed Storage Mode for XML 351

Intact Storage Mode for XML 352

Using IMS Explorer for Development for Testing 357

Part V: IMS System Administration

Chapter 19 The IMS System Definition Process 359

Overview of the IMS System Definition Process 360

Types of IMS System Definitions 362

Stage 1 of the IMS System Definition Process 363

Stage 2 of the IMS System Definition Process 363

JCLIN Processing 364

SMP/E Maintenance 364

IMS Security 364

IMS System Definition Macros 364

Extended Terminal Option 369

ETO Terminology 370

How Structures Are Created and Used 373

Descriptors and Exit Routines 374

How Descriptors Are Created and Used 374

Summary of ETO Implementation 375

Dynamic Resource Definition and Online Change 377

Dynamic Resource Definition 377

The Online Change Process 380

Chapter 20 Customizing IMS 383

What Can Be Customized 384

Exit Routine Naming Conventions 385

Changeable Interfaces and Control Blocks 385

IMS Standard User Exit Parameter List 385

Routine Binding Restrictions 386

Registers and Save Areas 386

IMS Callable Services 386

Storage Services 386

Control Block Services 387

自动操作界面服务387年

Using Callable Services 387

Exit Routine Performance Considerations 387

Summary of IMS Exit Routines 388

Chapter 21 IMS Security 397

Overview of DB/DC and DCCTL Security 397

DB/DC and DCCTL Resources That Can Be Protected 398

Defining Security During DB/DC and DCCTL System Definition 398

Security Facilities for DB/DC and DCCTL Resources 399

Overview of DBCTL Security 401

DBCTL Resources That Can Be Protected 401

Defining Security During DBCTL System Definition 402

Security Facilities for DBCTL Resources 402

Chapter 22 IMS Logging 405

Overview of IMS System Logging 405

Database Recovery Control Facility 407

IMS System Checkpoints 407

IMS Log Data Sets 408

Online Log Data Sets 408

Write-Ahead Data Sets 412

System Log Data Sets 412

Recovery Log Data Sets 413

IMS Restart Data Set 413

IMS Log Buffers 413

Chapter 23 Database Recovery Control Facility 415

Overview of DBRC 416

DBRC Tasks 416

DBRC Components 417

RECON Data Set 417

Database Recovery Control Utility (DSPURX00) 417

Skeletal JCL 418

When to Use DBRC 418

Communicating with DBRC 419

DBRC Commands 419

DBRC API 420

DBRC Functions 420

Recording and Controlling Log Information 421

How DBRC Helps in Recovery 424

Recording Information about Opening and Updating Databases 429

Supporting Data Sharing 430

Supporting Remote Site Recovery 432

Supporting IMSplexes 433

Overview of the RECON Data Sets 433

RECON Records 434

Database-Related Information 436

IMS Systems and the RECON Data Set 436

Database Names in the RECON Data Set 436

Defining and Creating the RECON Data Sets 437

Placement of the RECON Data Sets 438

Initializing the RECON Data Sets 438

Allocating the RECON Data Sets to an IMS System 438

Maintaining the RECON Data Sets 439

Backing Up the RECON Data Sets 440

Deleting Inactive Log Records from the RECON Data Sets 440

Monitoring the RECON Data Sets 440

Reorganizing RECON Data Sets 441

Re-Creating the RECON Data Sets 442

Recommendations for RECON Data Sets 443

Chapter 24 Operating IMS 445

Controlling IMS 445

Controlling IMS with the TSO SPOC Application 445

Issuing Batch SPOC Commands 447

Modifying and Controlling System Resources 448

Modifying System Resources Online 448

List of Commands with Similar Functions for Multiple Resources 453

Modifying Dependent Regions 461

Modifying Telecommunication Lines 461

How to Modify Terminals 461

Modifying and Controlling Transactions 462

Database Control 462

Creating, Updating, Deleting, and Querying Resource Definitions Dynamically 463

Modifying ETO User IDs and Assignments of ISC Users 464

Modifying Multiple System Coupling Resources 464

Modifying Security Options 464

Displaying and Terminating Conversations 465

Modifying and Controlling Subsystems 465

Controlling OTMA Input Messages 465

Recovery During the IMSRSC Repository Data Set Update Process 465

Connecting and Disconnecting Subsystems 465

Starting IMS 466

Starting an IMSplex 467

Starting the CSL 467

Starting the IMS Control Region 467

Starting the IRLM 468

Starting the CQS 468

Starting Dependent Regions 468

Starting the IMS Transaction Manager 469

Starting IMS Connect 469

Restarting IMS 469

Cold Start 470

Warm Start 470

Emergency Restart 470

Monitoring the System 470

Monitoring IMS Connect Connections 471

IMS System Log Utilities 472

Gathering Performance-Related Data 473

IBM IMS Tools 474

Shutting Down IMS 474

Stopping the IMS Transaction Manager 475

Stopping Dependent Regions 475

Shutting Down the IMS Control Region 475

Stopping the IRLM 476

Shutting Down CQS 476

Shutting Down an IMSplex 476

IMS Failure Recovery 477

Executing Recovery-Related Functions 478

Issuing DBRC Commands 478

Dumping the Message Queues 479

Recovering the Message Queues 479

Archiving the OLDS 480

Making Databases Recoverable or Nonrecoverable 480

Running Recovery-Related Utilities 480

Controlling Data Sharing 480

Controlling Data Sharing Using DBRC 481

Monitoring the Data-Sharing System 481

Chapter 25 IMS Recovery Facilities 483

Recovery of Failing IMS Components 484

恢复使用动态拆除和批量撤销485

Recovery Using DBRC 485

Recovery in an IMSplex 486

Recovery of IMS Systems in an IMSplex 486

Recovery of CSL in an IMSplex 486

在486年一个IMSplex恢复存储库服务器

Recovery in a Parallel Sysplex Environment 487

Recovery Using InfoSphere IMS Replication for z/OS 487

Recovery Using IMS Recovery Expert for z/OS 488

Recovery Using the Extended Recovery Facility 489

Recovery Using Remote Site Recovery (RSR) 490

Chapter 26 IBM IMS Tools 493

Application Management Tools 493

IBM IMS Batch Backout Manager for z/OS 494

IBM IMS Batch Terminal Simulator for z/OS 494

IBM IMS Program Restart Facility for OS/390 495

Backup and Recovery Tools 495

IBM IMS DEDB Fast Recovery for z/OS 495

IBM IMS Recovery Expert for z/OS 495

IBM IMS Recovery Solution Pack for z/OS 496

Database Administration and Change Management Tools 497

IBM IMS High Availability Large Database Toolkit for z/OS 497

IBM IMS Sequential Randomizer Generator for OS/390 497

IBM Tools Base for z/OS 497

Data Governance/Regulatory Compliance Tools 498

IBM IMS Audit Management Expert for z/OS 498

IBM InfoSphere Guardium Data Encryption for DB2 and IMS Databases 499

Information Integration Management Tools 499

IBM IMS DataPropagator for z/OS 499

IBM InfoSphere Classic Data Event Publisher for z/OS 500

IBM InfoSphere Classic Replication Server for z/OS 500

Performance Management Tools 501

IBM IMS Buffer Pool Analyzer for z/OS 501

IBM IMS Network Compression Facility for z/OS 501

IBM IMS Performance Solution Pack for z/OS 502

IBM Tivoli OMEGAMON XE for IMS on z/OS 502

IBM Transaction Analysis Workbench for z/OS 503

Transaction Management and System Management Tools 503

IBM IMS Command Control Facility for z/OS 503

IBM IMS Configuration Manager for z/OS 503

IBM IMS Extended Terminal Option Support for z/OS 504

IBM IMS High Performance System Generation Tools for z/OS 504

IBM IMS Queue Control Facility for z/OS 505

IBM IMS Sysplex Manager for z/OS 505

IBM IMS Workload Router for z/OS 505

Utilities Management Tools 506

IBM IMS Cloning Tool for z/OS 506

IBM IMS Database Control Suite for z/OS 506

IBM IMS Database Reorganization Expert for z/OS 507

IBM IMS Database Solution Pack z/OS 507

IBM IMS Fast Path Solution Pack for z/OS 508

IBM IMS Online Reorganization Facility for z/OS 509

Miscellaneous IMS Tools 510

Part VI: IMS in a Parallel Sysplex Environment

Chapter 27 Introduction to Parallel Sysplex 511

Goals of a Sysplex Environment 512

Some Components and Terminology in a Parallel Sysplex 513

IMS Data Sharing and the Sysplex Environment 514

DBRC and Data-Sharing Support 515

Block-Level Data Sharing 515

Fast Database Recovery 516

Sysplex Data-Sharing Concepts 517

Summary of IMS Data Sharing and the Sysplex Environment 518

IMS Transaction Manager and the Sysplex Environment 520

IMS Shared Queues 520

VTAM Generic Resource Support 523

Other Workload-Routing and Workload-Balancing Capabilities 523

Summary of IMS TM and the Sysplex Environment 524

IMS Common Service Layer and the IMSplex 525

Chapter 28 IMSplexes and the IMS Common Service Layer 527

IMSplex Overview 528

IMS Components and System Services That Are Part of an IMSplex 530

Common Queue Server 530

Common Service Layer 530

Repository Server (RS) 531

Multiple Systems Coupling in an IMSplex 531

Recovering Systems in an IMSplex 531

z/OS Components and System Services Used in an IMSplex 532

Common Service Layer Overview 532

CSL Configuration Examples 533

CSL Managers 540

Overview of the CSL Open Database Manager 540

Overview of the CSL Operations Manager 540

Overview of the CSL Resource Manager 542

Overview of the CSL Structured Call Interface 543

Defining and Tailoring an IMSplex 543

Defining CQS 544

Defining the IMS Control Region 544

Defining ODBM 544

Defining OM 545

Defining RM 545

Defining SCI 545

Defining a Simplified IMSplex for the Type-2 Command Environment 545

IMS Functions That Use the IMS Common Service Layer 545

Operating an IMSplex 546

A Single SPOC Program in CSL to Control an IMSplex 547

The TSO SPOC 550

The Batch SPOC 551

Sequence for Starting CSL Address Spaces 552

Part VII: Appendixes

Appendix A Glossary 553

Appendix B Notices 567

Index 571

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We may revise this Privacy Notice through an updated posting. We will identify the effective date of the revision in the posting. Often, updates are made to provide greater clarity or to comply with changes in regulatory requirements. If the updates involve material changes to the collection, protection, use or disclosure of Personal Information, Pearson will provide notice of the change through a conspicuous notice on this site or other appropriate way. Continued use of the site after the effective date of a posted revision evidences acceptance. Please contact us if you have questions or concerns about the Privacy Notice or any objection to any revisions.

Last Update: November 17, 2020

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