Failures under MVS p. 67 General p. 67 JCL Errors p. 68 Syntactical JCL Errors p. 68 Allocation JCL Errors p. 69 ABEND Failures p.

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1 About the Author p. vii Preface p. xv Acknowledgments p. xix Introduction p. 1 Historical Perspective p. 1 JCL Complexity p. 3 Multiprogramming and Virtual Storage p. 4 Data Set Organizations p. 8 Non-VSAM Data Set Organizations p. 8 VSAM Data Set Organizations p. 9 Record Formats p. 9 VTOC, PDS, and the Catalog p. 11 Storage Management Subsystem p. 15 Jobs, Steps, and Initiators p. 18 Types of JCL Statements p. 25 The Syntax of JCL p. 27 Discussion of JOB and EXEC Statement Parameters p. 35 The JOB Statement--General p. 35 Accounting Information p. 37 Programmer's Name p. 40 The MSGLEVEL Parameter p. 40 The ADDRSPC Parameter p. 41 The REGION Parameter p. 42 The COND Parameter p. 44 The CLASS Parameter p. 45 The PRTY Parameter p. 46 The TIME Parameter p. 47 The NOTIFY Parameter p. 48 The PERFORM Parameter p. 48 The MSGCLASS Parameter p. 49 The RESTART Parameter p. 50 The TYPRUN Parameter p. 52 The EXEC Statement--General p. 53 The PGM Parameter p. 54 The PARM Parameter p. 56 The ADDRSPC Parameter p. 58 The REGION Parameter p. 58 The COND Parameter p. 60 The TIME Parameter p. 61 The PERFORM Parameter p. 63 The ACCT Parameter p. 64

2 Failures under MVS p. 67 General p. 67 JCL Errors p. 68 Syntactical JCL Errors p. 68 Allocation JCL Errors p. 69 ABEND Failures p. 70 Bypassing Execution Because of a Return Code p. 76 Invisible Failures p. 76 Operational Considerations p. 77 Execution Before and After Failure p. 77 Immediate Visibility of Failures p. 77 Controlling Execution p. 79 General p. 79 A Return (or Condition) Code p. 80 The COND Parameter p. 82 The COND Parameter in the JOB Statement p. 82 The COND Parameter in the EXEC Statement p. 86 Practical Examples p. 93 Ordinary Examples p. 93 Conditional Execution in Job Recovery p. 93 The Warning Last Step p. 96 Innovative Ways of Controlling Execution p. 99 Discussion of DD Statement Parameters p. 103 The DD Statement--General p. 103 The DSN Parameter p. 104 How a Program Finds a Data Set p. 108 The DISP Parameter p. 108 The UNIT Parameter p. 120 The VOL Parameter p. 126 The SPACE Parameter p. 134 The SPACE Parameter for VSAM Data Sets p. 142 The LABEL Parameter p. 143 The DCB Parameter p. 147 The FREE Parameter p. 154 The EXPDT Parameter p. 155 The RETPD Parameter p. 155 The BLKSIZE Parameter p. 156 The LRECL Parameter p. 156 The RECFM Parameter p. 156 The AVGREC Parameter p. 156 The DATACLAS Parameter p. 158

3 The KEYOFF Parameter p. 159 The LIKE Parameter p. 160 The MGMTCLAS Parameter p. 161 The RECORG Parameter p. 162 The REFDD Parameter p. 163 The STORCLAS Parameter p. 164 Using the Catalog p. 167 Definitions p. 167 The ICF Catalog Entry p. 169 When and How the Catalog is Used p. 172 Non-SMS-Managed Non-VSAM Data Sets p. 174 SMS-Managed and VSAM Data Sets p. 176 Using Master/User Catalog p. 176 Adding a New Entry in the Catalog p. 182 Non-SMS-Managed Non-VSAM Data Sets p. 182 SMS-Managed and VSAM Data Sets p. 183 When an Attempt to Catalog a New Data Set Fails p. 184 Non-SMS-Managed Non-VSAM Data Sets p. 185 SMS-Managed and VSAM Data Sets p. 190 Cataloging an Existing Data Set p. 190 Non-SMS-Managed Non-VSAM Data Sets p. 190 SMS-Managed and VSAM Data Sets p. 194 Uncataloging a Tape Data Set p. 196 Retrieving Data Sets p. 201 Definition p. 201 Retrieval and the Catalog p. 202 Non-SMS-Managed Non-VSAM Data Sets p. 203 SMS-Managed Data Sets p. 207 The Logic of Allocation, Program Execution, and Step Termination for Retrieval p. 208 Disk Data Set Retrieval p. 209 Tape Data Set Retrieval p. 215 Tape Data Set Retrieval With Deferred Mounting p. 217 Retrieving and Deleting Data Sets p. 218 Retrieving Partitioned Data Sets p. 225 DISP=OLD vs. DISP=SHR p. 227 Retrieving Using NL, BLP, and LTM p. 228 Retrieving Multivolume Data Sets p. 231 Retrieving and Extending a Data Set p. 232 SMS-Managed Data Sets p. 232 Non-SMS-Managed Data Sets p. 233 Altering Secondary Allocation and Releasing Unused Space p. 237

4 DCB Considerations for Retrieval p. 239 Using Unit Affinity and FREE=CLOSE p. 242 Retrieving Concatenated Data Sets p. 244 Retrieving VSAM Data Sets p. 246 Retrieving GDG Generations p. 247 Creating Data Sets p. 249 Definition p. 249 Parameter Requirements p. 249 The Logic of Allocation for Creating Disk Data Sets p. 252 Non-VSAM Non-SMS-Managed Data Sets p. 252 SMS-Managed and VSAM Data Sets p. 254 Creating Nontemporary Sequential and Partitioned Data Sets p. 258 Creating VSAM Data Sets p. 263 Creating Temporary Disk Data Sets p. 264 Creating Direct Data Sets p. 267 SPACE Parameter Considerations p. 268 Creating Multivolume Disk Data Sets p. 280 Non-VSAM Non-SMS-Managed Data Sets p. 281 Non-VSAM SMS-Managed Data Sets p. 284 VSAM Data Sets p. 288 Public/Private Considerations p. 290 Non-SMS-Managed Volumes p. 290 SMS-Managed Volumes p. 292 The Logic of Allocation, Open, and Close for Creating Tape Data Sets p. 293 Creating SL Tape Data Sets Without and With Deferred Mounting p. 297 Creating NL Tape Data Sets p. 299 Creating Multivolume Tape Data Sets p. 300 Creating Multifile Tape Volumes p. 301 Using Unit Affinity and FREE=CLOSE p. 305 DCB Considerations for Creating Data Sets p. 307 Selecting a Proper Blocksize p. 311 Creating New GDG Generations p. 318 Passing and Receiving Data Sets p. 319 Definitions p. 319 Passing and Receiving p. 320 Passing Without Receiving p. 323 Peculiarities With PASS p. 328 Unusual Defaults for DISP=OLD p. 328 Unusual Abnormal Disposition With PASS p. 329 Passing Temporary Data Sets p. 330 When to Use PASS p. 334

5 PASS and Restart Recovery p. 335 Special DD Statements and Parameters p. 341 DD * and DD Data--Supplying Sysin Data p. 341 The SYSOUT Parameter p. 344 Parameters Used With SYSOUT p. 346 The OUTPUT Statement p. 355 Parameters Common to Both SYSOUT DD and OUTPUT Statements, but With Different Syntax p. 356 Selected Parameters Available only in the OUTPUT Statement p. 358 Examples of the OUTPUT Parameter and the OUTPUT Statement p. 361 The DUMMY Parameter p. 363 The DDNAME Parameter p. 365 The JOBLIB and STEPLIB DD Statements p. 367 The JOBLIB DD Statement p. 368 The STEPLIB DD Statement p. 369 The JOBCAT and STEPCAT DD Statements p. 371 The SYSUDUMP, SYSMDUMP, and SYSABEND DD Statements p. 371 The SYSUDUMP DD Statement p. 371 The SYSMDUMP DD Statement p. 372 The SYSABEND DD Statement p. 372 Virtual I/O (VIO) p. 373 Concatenation p. 375 Generation Data Groups p. 381 How GDGs Work p. 381 Non-SMS-Managed Generations p. 384 SMS-Managed Generations p. 386 Preparing for a GDG p. 390 Changing the Characteristics of a GDG p. 393 Changing the Limit if SMS Is Not Installed p. 393 Changing the Limit if SMS Is Installed p. 394 Using a GDG Model (Non-SMS-Managed GDG's Only) p. 395 Peculiarities of GDGs p. 397 Concatenating Generations of a GDG p. 401 Generation 9999 p. 401 Using Different Versions of a GDG Generation p. 402 Recovering from a Bad Generation p. 402 Using BLP With GDGs p. 405 Avoiding an Empty Generation p. 405 Job Restart With GDGs p. 407 Using Procedures p. 411 General p. 411 The Use of Procedure Libraries p. 412

6 Invoking a Procedure p. 413 Restrictions of a Procedure's Contents p. 414 Overriding Procedures p. 415 The Output of a Procedure p. 429 Overcoming Some Restrictions p. 432 Compile-Linkedit-Go Procedures p. 433 Referring to a Procedure from Outside p. 436 Special Overrides p. 438 Executing a Procedure More Than Once p. 445 Symbolic Parameters and Symbolic Overrides p. 449 The PROC Statement p. 453 Rules for Symbolic Overriding p. 454 Choosing Symbolic Parameters p. 458 In-Stream Procedures p. 460 Rules for In-Stream Procedures p. 462 Using In-Stream Procedures p. 463 Utilities and IDCAMS p. 467 JCL for Utilities p. 468 Utility Control Statement Syntax p. 469 The IEBGENER Utility p. 470 The IEHPROGM Utility p. 474 The IEBCOPY Utility p. 478 The IEBPTPCH Utility p. 482 The IEHLIST Utility p. 485 IDCAMS p. 487 Required JCL for IDCAMS p. 487 IDCAMS Command Syntax p. 488 Examples of IDCAMS Used With VSAM Objects p. 490 Examples of IDCAMS Used With Non-VSAM Data Sets p. 400 SMS Considerations Summary p. 511 SMS Benefits--New Features p. 511 SMS Installed--Not Activated p. 511 SMS Installed and Activated p. 514 The Benefits of SMS-Managed Data Sets p. 517 Improved Disk Volume and Space Allocation p. 517 Synchronized VTOC and Catalog Entries p. 520 JCL Compatibility p. 525 SMS-Related Problems p. 527 Retrieving With VOL Parameter p. 527 Creating With VOL Parameter p. 528 Extending a Disk Data Set to Additional Volumes p. 528

7 Deleting and Uncataloging Data Sets p. 529 JCL for Non-Existing Data Sets p. 530 Using JOBCAT and STEPCAT p. 530 Using IDCAMS p. 531 Using GDGs p. 533 Creating Multivolume Data Sets p. 536 Ignored DD Statement Parameters p. 536 Space Problem With AVGREC p. 537 Creating the Same Dsname Twice p. 538 Creating and Retrieving in the Same Step p. 539 Different DISP Defaults With SMS p. 539 SMS Messages p. 541 Allocation Messages for Data Sets, SMS and Non-SMS-Managed p. 542 Step-Termination Messages for Data Sets, SMS and Non-SMS-Managed p. 543 Common JCL Errors With and Without SMS p. 544 ABENDS Eliminated or Minimized With SMS p. 546 ABEND Failures Eliminated p. 546 ABEND Failures Minimized p. 547 Disk Characteristics p Capacity Table p Disk Capacity Table p Capacity Table p Capacity Table p. 553 Bibliography p. 555 Glossary p. 557 Index p. 565 Table of Contents provided by Blackwell's Book Services and R.R. Bowker. Used with permission.