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Figure 68 Relational database
Figure 68 on page 238 shows a typical relational database with the structures
described below.
Data files are physical files that contain all of a database’s data. They change
randomly and can be very large. They are internally divided into pages.
Transaction logs record all database transactions before they are further processed.
Should a failure prevent modified data from being permanently written to data files,
the changes can be obtained from log files. Any kind of recovery is done in two
parts: roll forward, which applies transaction changes into the main database and
roll back, which removes uncommitted transactions.
Control files hold information about the physical structure of the database, such as,
database names, names and locations of a database’s data files and log files, and
the time stamp of the database’s creation. This control data is kept in control files.
These files are critical for the operation of the database-
The cache of the database server process contains the most-often used pages of the
data files.
The following is the standard flow of transaction processing:
Integration with database applications238
- HP Data Protector A.06.10 1
- Concepts guide 1
- Contents 3
- Concepts guide 17 17
- Concepts guide 19 19
- Publication history 21
- Publication history22 22
- About this guide 23
- About this guide24 24
- Online Help 26
- Documentation map 27
- GuideAbbreviation 28
- Integrations 29
- GuideIntegration 30
- About this guide32 32
- General information 33
- HP technical support 33
- Subscription service 34
- HP websites 34
- Documentation feedback 34
- 1 About backup and Data 35
- Protector 35
- What is a backup? 38
- What is a restore? 39
- Data Protector architecture 40
- HP Data Protector product 41
- Operations in the cell 42
- Enterprise environments 45
- Media management 48
- Backup devices 49
- User interfaces 50
- Data Protector Java GUI 52
- 2 Planning your backup 57
- Backup strategy planning 58
- Planning cells 62
- Windows domains 65
- Geographically remote cells 66
- The infrastructure 67
- Using hardware in parallel 69
- Software compression 70
- Hardware compression 70
- Full and incremental backups 71
- Object distribution to media 71
- Disk performance 72
- Planning security 73
- Data Protector users accounts 74
- Data Protector user groups 75
- Visibility of backed up data 76
- Data encryption 76
- What is backup ownership? 78
- Clustering 79
- Cluster support 82
- Example cluster environments 83
- Full backups 92
- Incremental backups 92
- Enhanced incremental backup 93
- Types of incremental backups 93
- Considering restore 96
- Data protection 99
- Catalog protection 100
- Logging level 100
- Browsing files for restore 100
- Backing up data 102
- Selecting backup objects 103
- Media sets 105
- Backup sessions 105
- Object mirrors 105
- Scheduling tips and tricks 106
- When to schedule backups 107
- Staggering full backups 107
- Optimizing for restore 107
- Duplicating backed up data 112
- Copying objects 113
- Why use object copy? 116
- Object mirroring 119
- Copying media 122
- Automated media copying 123
- Smart media copying using VLS 124
- Restoring data 125
- Selection of the media set 126
- Selection of devices 126
- Disaster recovery 128
- Disaster recovery methods 130
- 3 Media management and 133
- Media life cycle 134
- Media pools 135
- Free pools 137
- Media pool usage examples 140
- Media needed for rotation 144
- Labeling Data Protector media 145
- Location field 146
- Selecting media for backups 147
- Calculating media condition 150
- Vaulting 151
- How load balancing works 156
- Segment size 157
- Block size 158
- Number of disk agent buffers 159
- Device locking and lock names 159
- Standalone devices 160
- Small magazine devices 161
- Large libraries 162
- Enter / eject mail slots 163
- Barcode support 163
- Cleaning tape support 164
- Storage Area Networks 171
- Fibre Channel 172
- Point-to-point topology 173
- Loop topology 173
- Switched topology 174
- Device sharing in SAN 175
- Device locking 177
- Indirect Library Access 178
- Direct Library Access 179
- Device sharing in clusters 180
- Floating drives 181
- 4 Users and user groups 183
- Users and user groups 184
- Using predefined user groups 185
- Data Protector user rights 185
- Users and user groups186 186
- 5 The Data Protector internal 187
- IDB architecture 189
- Catalog Database (CDB) 191
- IDB operation 194
- During restore 195
- Exporting media 195
- Overview of IDB management 196
- IDB growth and performance 197
- IDB size estimation 203
- 6 Service management 205
- Service management206 206
- Service management208 208
- SNMP traps 210
- The monitor 210
- Reporting and notification 211
- Service management212 212
- Windows application log 213
- Java-based online reporting 213
- Service management214 214
- Service management216 216
- Data Protector OM SIP 217
- Service management218 218
- 7 How Data Protector operates 219
- Queuing of backup sessions 224
- Restore sessions 225
- Queuing of restore sessions 227
- Parallel restores 228
- Object copy sessions 229
- Object consolidation sessions 233
- Media management sessions 235
- 8 Integration with database 237
- 9 Direct backup 243
- Direct backup 244
- How direct backup works 245
- Environment 246
- About resolve 247
- About XCopy 247
- Direct backup process flow 248
- Requirements and support 249
- Supported configurations 250
- Direct backup252 252
- 10 Disk backup 253
- Disk backup benefits 254
- Disk backup256 256
- 11 Synthetic backup 257
- Synthetic backup benefits 258
- Restore and synthetic backup 260
- Synthetic backup262 262
- Synthetic backup264 264
- 12 Split mirror concepts 265
- Split mirror concepts266 266
- Split mirror concepts268 268
- Local mirror - single host 270
- Remote mirror 270
- Split mirror concepts272 272
- Other configurations 273
- Split mirror concepts274 274
- 13 Snapshot concepts 275
- Snapshot concepts 276
- Snapshot backup types 278
- Instant recovery 279
- Types of snapshots 279
- Snapshot concepts280 280
- Snapshot concepts282 282
- Snapshot concepts284 284
- Concepts guide 287 287
- Snapshot concepts288 288
- 14 Microsoft Volume Shadow 289
- Copy service 289
- A Backup scenarios 297
- Backup scenarios298 298
- Company XYZ 299
- Backup strategy requirements 302
- Proposed solution 303
- Backup scenarios304 304
- Backup scenarios306 306
- 70 GB / 7 h23 GB / 3 hEnglish 309
- 31 GB / 3 h10 GB / 1 hAdmin 309
- Backup scenarios310 310
- Backup scenarios312 312
- Company ABC 313
- Backup scenarios314 314
- Backup scenarios318 318
- 172243A*ABC Cape 319
- Backup scenarios322 322
- Backup scenarios324 324
- Backup options 328
- Backup scenarios330 330
- B Further information 331
- Further information332 332
- Incr1 backup 333
- Further information334 334
- Full backup 335
- Further information336 336
- Further information338 338
- Internationalization 340
- File name handling 341
- Browsing file names 342
- Concepts guide 343 343
- Further information344 344
- Glossary 345
- Glossary346 346
- Glossary348 348
- Glossary350 350
- Glossary352 352
- Glossary354 354
- Glossary356 356
- Glossary358 358
- Glossary360 360
- (EMC Symmetrix 361
- Glossary362 362
- Glossary364 364
- Glossary366 366
- Glossary368 368
- Glossary370 370
- Glossary372 372
- Glossary374 374
- Glossary376 376
- Glossary378 378
- Glossary380 380
- Glossary382 382
- Glossary384 384
- Glossary386 386
- Glossary388 388
- (HP StorageWorks 389
- VA and HP 389
- StorageWorks EVA 389
- Disk Array XP 390
- Glossary392 392
- (ZDB specific term) 394
- Glossary396 396
- Glossary398 398
- Glossary400 400
- Glossary402 402
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