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Dataset Fragmentation Introduction
13-2 User Reference
Introduction
Dataset Fragmentation
When you create a dataset with a large primary allocation, there may not be a large enough
free space in the pool to contain the entire primary extent. BIM-EPIC can respond to this
condition by allocating the largest contiguous free space to the primary extent and allocating
secondary extents when the primary extent becomes full. This process is called dataset
fragmentation.
Fragmentation can be enabled globally by specifying the configuration option FRAG=YES.
Fragmentation can be enabled for an individual dataset by:
• Specifying the “F” option on a DLBL statement
• Specifying the MXIG or ALX subparameter in the SPACE parameter on a DD
statement
•
Allowing the operator to respond FRAG to the EP038 message
Description
- BIM-EPIC 1
- This documentation applies to 2
- Contents 3
- Contents v 5
- Contents vii 7
- Contents ix 9
- Trademark Information 10
- Preface xiii 13
- Related Publications 14
- Introduction 15
- BIM-EPIC Fundamentals 16
- Controlled Datasets 17
- Start Track 1 Datasets 18
- DSN Catalog Entries 20
- DSN Catalog Management 21
- DSN Catalog Maintenance 22
- 1-10 User Reference 24
- EDD Tape Information 26
- EDD Disk Information 28
- Version Information 30
- 1-18 User Reference 32
- Automatic Cataloging 33
- 1-20 User Reference 34
- Rules for Dataset Retention 36
- 1-24 User Reference 38
- Overriding Standard Retention 39
- Automatic Generation Purge 40
- The Recorder File 41
- LUB Allocation 42
- Managing Tape Devices 43
- 1-30 User Reference 44
- Managing Disk Devices 45
- 1-32 User Reference 46
- Creating Reports 47
- The BIM-EPIC Environment 48
- BIM-EPIC JCL 50
- 1-38 User Reference 52
- BIM-EPIC Job Control 53
- Tape Processing 54
- 1-44 User Reference 58
- BIM-EPIC Online Manager 59
- 2-2 User Reference 60
- Overview 61
- 2-4 User Reference 62
- 2-6 User Reference 64
- Using the Online Manager 65
- 2-8 User Reference 66
- 2-10 User Reference 68
- Maintaining User Profiles 70
- Customizing the EDD Display 71
- 2-14 User Reference 72
- Using Online Manager Help 74
- 2-20 User Reference 78
- Managing EDDs 79
- 2-22 User Reference 80
- Creating a Dataset Definition 81
- Using TSIDMNT 82
- Updating a Dataset Definition 83
- Locking a Dataset Definition 84
- 2-28 User Reference 86
- Deleting a Dataset Definition 87
- Managing Dataset Versions 88
- 2-32 User Reference 90
- Displaying Version Attributes 91
- Adding Version Information 92
- Locking a Version 93
- Releasing a Locked Version 94
- Unlocking a Version 95
- Closing a Version 96
- Managing Tapes 98
- 2-42 User Reference 100
- Purging a Tape Volume 102
- Recording Tape Cleaning 103
- Retention and Scratching 104
- 2-48 User Reference 106
- Cycling a Dataset Version 108
- Scratching a Dataset Version 110
- 3-2 User Reference 112
- Command Summary 113
- BIM-EPIC System Requirements 114
- CA-EPIC for CMS Requirements 115
- TSIDMNT Commands 116
- PASSWORD 117
- TSIDMNT Commands ADD 119
- ADD TSIDMNT Commands 120
- 3-10 User Reference 120
- CAPACITY 121
- TSIDMNT Commands CATALOG 123
- CATALOG TSIDMNT Commands 124
- 3-14 User Reference 124
- 3-16 User Reference 126
- TSIDMNT Commands CYCLE 131
- DELETE TSIDMNT Commands 132
- 3-22 User Reference 132
- DELETE ' 132
- TSIDMNT Commands DEQ 133
- DEQ (no parameters) 133
- TSIDMNT Commands DISPLAY 135
- DISPLAY TSIDMNT Commands 136
- 3-26 User Reference 136
- DISPLAY ALL,ACTIVE,JOB=AR8000 136
- DIS 'AP.BALANCE' 136
- TSIDMNT Commands ENQ 137
- ENQ (no parameters) 137
- MCATALOG 139
- OFFLINE (VSE Only) 141
- ONLINE (VSE Only) 142
- QUIESCE (VSE Only) 144
- RETAIN TSIDMNT Commands 148
- 3-38 User Reference 148
- SCRATCH TSIDMNT Commands 150
- 3-40 User Reference 150
- TRANSFER 151
- TSIDMNT Commands UPDATE 153
- UPDATE TSIDMNT Commands 154
- 3-44 User Reference 154
- Accessing the DSN Catalog 155
- Examples 158
- TSIDAC2 Calling Procedure 160
- ADDRESS EPIC 165
- TLBL Statements 168
- 5-4 User Reference 170
- TLBL Options 172
- TLBL Statements TLBL Options 173
- DLBL Statements 174
- DLBL Options 176
- DLBL Statements DLBL Options 177
- DLBL Options DLBL Statements 178
- 5-12 User Reference 178
- BIM-EPIC DD Statements 179
- Specifying the DD Statement 180
- DD Statement Syntax 181
- Special DD Names 183
- 6-6 User Reference 184
- * //SYSABEND DD SYSOUT=A 184
- * //SYSMDUMP DD SYSOUT=A 184
- 6-8 User Reference 186
- AMP Parameter 190
- DCB Parameter 191
- 6-14 User Reference 192
- DISP Parameter 193
- • DELETE 194
- 6-18 User Reference 196
- 6-20 User Reference 198
- DSN Parameter 200
- FREE Parameter 202
- LABEL Parameter 203
- OPTION Parameter 204
- SPACE Parameter 208
- 6-32 User Reference 210
- UNIT Parameter 211
- 6-34 User Reference 212
- VOLUME Parameter 213
- 6-42 User Reference 220
- Running Jobs With BIM-EPIC 221
- JCL or DSN Catalog? 223
- Input Dataset Selection 224
- Rules For Dataset Name 226
- Disk Processing 228
- Reusing the Same Space 230
- Processing Tape Datasets 231
- 7-12 User Reference 232
- Multi-Volume Processing 233
- Multi-Dataset Processing 234
- 7-16 User Reference 236
- Example 4 241
- 7-22 User Reference 242
- Types of Datasets 244
- Direct Access Datasets 245
- ISAM Datasets 246
- 7-28 User Reference 248
- Work Datasets 249
- 7-30 User Reference 250
- Common Work Datasets (CWDS) 251
- TYPEFLE=WORK DTFs 252
- Compiler Work Datasets 253
- Uncontrolled Datasets 254
- Physical IOCS Processing 255
- 7-36 User Reference 256
- Sorting with BIM-EPIC 257
- 7-38 User Reference 258
- Sort Specifics 259
- 7-40 User Reference 260
- SORTWK Datasets 261
- 7-42 User Reference 262
- IDCAMS BACKUP and RESTORE 263
- IDCAMS REPRO 264
- IDCAMS IMPORT/EXPORT 265
- LIBR BACKUP/RESTORE 266
- VSE/POWER ACCOUNT FILE 268
- Tape Spooling 269
- 7-50 User Reference 270
- SQL/VSE Tape Output Functions 271
- Requirements with BIM-EPIC 272
- Processing with COBOL II 273
- 7-54 User Reference 274
- Choosing the Device Type 276
- Concatenating Datasets 281
- 7-64 User Reference 284
- BIM-EPIC Utilities 285
- Pre-Open Processing (TSIDASS) 286
- Deleting Datasets (TSIDDEL) 291
- 8-10 User Reference 294
- [tapemark], data, tapemark 294
- 8-12 User Reference 296
- Printing Datasets (TSIDDMP) 300
- 8-18 User Reference 302
- JMCL Statements 308
- Using Comment Statements 310
- JMCL Parameters 311
- Conditions and IF 315
- 9-10 User Reference 316
- // EXEC PHASE1 IF=(CC LT 16) 316
- Setting Values 317
- Symbolic Replacements 318
- JMCL Example 320
- Assembler 324
- TSIDJC2 Return Codes 325
- Executing CP Commands 326
- Job Scheduling 327
- Event Posting 328
- Scheduling Functions 329
- TSIDCREL) 330
- TSIDCHK or TSIDCCHK 331
- Description 331
- 10-6 User Reference 332
- Executing in Batch Jobs 334
- Executing in CICS 337
- Return Codes 338
- Processing Requirements 340
- SET PART= 341
- Job Activity Reports 343
- Recorder History Dataset 344
- EXCLUDE Control Statement 346
- TSIDARP Control Statement 347
- 11-14 User Reference 356
- 11-16 User Reference 358
- Managing Tape Volumes 359
- 12-4 User Reference 362
- Attention Routine Commands 363
- FREE and STATUS Commands 364
- Mounting Tapes 365
- Input Mounting Tapes 366
- 12-8 User Reference 366
- Initializing Tapes (TSIDINIT) 367
- 12-10 User Reference 368
- 12-16 User Reference 374
- Tape Vaulting 375
- Additional Reports 376
- Moving Volumes (TSIDVLT) 378
- Manually Controlled Vaults 380
- 12-26 User Reference 384
- Disk Space Management 385
- Secondary Allocation 387
- Truncation 388
- 13-6 User Reference 390
- VTOC Utilities 391
- Online VTOC Displays (TVTO) 395
- 13-12 User Reference 396
- 13-14 User Reference 398
- Offload System 399
- Introduction Offload System 400
- 13-16 User Reference 400
- 13-20 User Reference 404
- // RESET SYSIPT 407
- 13-28 User Reference 412
- TSIDONL Control Statements 413
- 13-32 User Reference 416
- REPT [PCT=n] 419
- CONI n n n … n 419
- CONO NV=n 419
- 13-38 User Reference 422
- Customized Reports 424
- TOJA Report Examples 425
- A-4 User Reference 426
- TSIDARP Report 428
- Activity Log Report 429
- TSIDBRP Reports 430
- Cross-Reference 431
- Report Example 431
- A-10 User Reference 432
- TSIDDIS Report 433
- TSIDJAC Report 435
- Job Time Activity 436
- TSIDLVT Report 437
- TSIDMNT Reports 439
- A-18 User Reference 440
- TSIDOFD Report 441
- TSIDOFL Report 442
- TSIDONL Report 443
- TSIDPRV Report 444
- TSIDSDS Report 445
- TSIDTAC Report 446
- Date Time Activity 447
- TSIDUTL Reports 448
- TSIDUTL ALL,DSN 450
- A-30 User Reference 452
- Display PULL 453
- Display Vault Report 454
- Display Scratch Report 455
- A-34 User Reference 456
- TSIDVLT Reports 457
- Vault Movement 458
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