Computer Associates BABNWUP900NE6 Administration Guide - Page 203

VLDB Maintenance Utilities

Page 203 highlights

Advanced RAIMA Very Large Database Maintenance The amount of time it takes to run the VLDB utilities varies greatly depending on the size of your database and the speed of your BrightStor ARCserve Backup server. Astpsdat is the largest part of the BrightStor ARCserve Backup VLDB. This database holds the most data and requires the most amount of time for the utilities to run. Important! We strongly encourage you to consider the time requirements before running these utilities and ensure that they will not conflict with your normal backup and restore functions. VLDB Maintenance Utilities All of the VLDB utilities are command line utilities that must be run from the BrightStor ARCserve Backup directory. Use the command prompt to access this directory and enter utilities. Dbcheck is the first VLDB utility you should run. This checks the integrity of VLDB. To run the dbcheck utility, enter the following syntax: dbcheck -a -L casdb;admin;secret [DBNAME] DBNAME is the name of the database to use for an integrity check (asjob, asmedia, asobject, asrhost, astape, astpdrv, astpsdat, asmsg, asmsgdat, or aslogerr). As dbcheck runs, information on the status of the database displays, ending with a final database summary. If a problem with the database is detected after running the dbcheck utility, you can use the following utilities to repair the corruption: ■ Dbdefrag-Run this utility only if you decreased pruning time and you want to make sure that you have as much free space as the largest database file. Important! You must run a prune job to remove records before you use the dbdefrag utility. Otherwise, the defrag will have nothing to do because there are no records marked as deleted. You can use the dbdefrag utility, followed by the keybuild utility, to compress a database after running a prune job and to repair corruption caused by broken links within VLDB entries (ex. A->B->C->...). If a link is corrupt or destroyed, VLDB cannot access data. Running this utility may remove these broken links and allow VLDB to access the data. To run the dbdefrag utility, enter the following syntax: Dbdefrag -a -L casdb;admin;secret [DBNAME] DBNAME is the name of the database that you want to defrag (asjob, asmedia, asobject, asrhost, astape, astpdrv, astpsdat, asmsg, asmsgdat, or aslogerr). ■ Keybuild-Use this utility only after you run the dbdefrag utility. This utility repairs high-level key corruption. Managing the Database and Reporting 8-17

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
  • 90
  • 91
  • 92
  • 93
  • 94
  • 95
  • 96
  • 97
  • 98
  • 99
  • 100
  • 101
  • 102
  • 103
  • 104
  • 105
  • 106
  • 107
  • 108
  • 109
  • 110
  • 111
  • 112
  • 113
  • 114
  • 115
  • 116
  • 117
  • 118
  • 119
  • 120
  • 121
  • 122
  • 123
  • 124
  • 125
  • 126
  • 127
  • 128
  • 129
  • 130
  • 131
  • 132
  • 133
  • 134
  • 135
  • 136
  • 137
  • 138
  • 139
  • 140
  • 141
  • 142
  • 143
  • 144
  • 145
  • 146
  • 147
  • 148
  • 149
  • 150
  • 151
  • 152
  • 153
  • 154
  • 155
  • 156
  • 157
  • 158
  • 159
  • 160
  • 161
  • 162
  • 163
  • 164
  • 165
  • 166
  • 167
  • 168
  • 169
  • 170
  • 171
  • 172
  • 173
  • 174
  • 175
  • 176
  • 177
  • 178
  • 179
  • 180
  • 181
  • 182
  • 183
  • 184
  • 185
  • 186
  • 187
  • 188
  • 189
  • 190
  • 191
  • 192
  • 193
  • 194
  • 195
  • 196
  • 197
  • 198
  • 199
  • 200
  • 201
  • 202
  • 203
  • 204
  • 205
  • 206
  • 207
  • 208
  • 209
  • 210
  • 211
  • 212
  • 213
  • 214
  • 215
  • 216
  • 217
  • 218
  • 219
  • 220
  • 221
  • 222
  • 223
  • 224
  • 225
  • 226
  • 227
  • 228
  • 229
  • 230
  • 231
  • 232
  • 233
  • 234
  • 235
  • 236
  • 237
  • 238
  • 239
  • 240
  • 241
  • 242
  • 243
  • 244
  • 245
  • 246
  • 247
  • 248
  • 249
  • 250
  • 251
  • 252
  • 253
  • 254
  • 255
  • 256
  • 257
  • 258
  • 259
  • 260
  • 261
  • 262
  • 263
  • 264
  • 265
  • 266
  • 267
  • 268
  • 269
  • 270
  • 271
  • 272
  • 273
  • 274
  • 275
  • 276
  • 277
  • 278
  • 279
  • 280
  • 281
  • 282
  • 283
  • 284
  • 285
  • 286
  • 287
  • 288
  • 289
  • 290
  • 291
  • 292
  • 293
  • 294
  • 295
  • 296
  • 297
  • 298
  • 299
  • 300
  • 301
  • 302
  • 303
  • 304
  • 305
  • 306
  • 307
  • 308
  • 309
  • 310
  • 311
  • 312
  • 313
  • 314
  • 315
  • 316
  • 317
  • 318
  • 319
  • 320
  • 321
  • 322
  • 323
  • 324
  • 325
  • 326
  • 327
  • 328
  • 329
  • 330
  • 331
  • 332
  • 333
  • 334
  • 335
  • 336
  • 337
  • 338
  • 339
  • 340
  • 341
  • 342
  • 343
  • 344
  • 345
  • 346
  • 347
  • 348
  • 349
  • 350
  • 351
  • 352
  • 353
  • 354
  • 355
  • 356
  • 357
  • 358
  • 359
  • 360
  • 361
  • 362
  • 363
  • 364
  • 365
  • 366
  • 367
  • 368
  • 369
  • 370
  • 371
  • 372
  • 373
  • 374
  • 375
  • 376
  • 377
  • 378
  • 379
  • 380
  • 381
  • 382

Advanced RAIMA Very Large Database Maintenance
Managing the Database and Reporting
8–17
The amount of time it takes to run the VLDB utilities varies greatly depending on
the size of your database and the speed of your BrightStor ARCserve Backup
server. Astpsdat is the largest part of the BrightStor ARCserve Backup VLDB. This
database holds the most data and requires the most amount of time for the utilities
to run.
Important!
We strongly encourage you to consider the time requirements before running
these utilities and ensure that they will not conflict with your normal backup and restore
functions.
VLDB Maintenance Utilities
All of the VLDB utilities are command line utilities that must be run from the
BrightStor ARCserve Backup directory. Use the command prompt to access this
directory and enter utilities.
Dbcheck is the first VLDB utility you should run. This checks the integrity of
VLDB.
To run the dbcheck utility, enter the following syntax:
dbcheck -a -L casdb;admin;secret [
DBNAME
]
DBNAME is the name of the database to use for an integrity check (asjob, asmedia,
asobject, asrhost, astape, astpdrv, astpsdat, asmsg, asmsgdat, or aslogerr). As
dbcheck runs, information on the status of the database displays, ending with a
final database summary.
If a problem with the database is detected after running the dbcheck utility, you
can use the following utilities to repair the corruption:
Dbdefrag—Run this utility only if you decreased pruning time and you want
to make sure that you have as much free space as the largest database file.
Important!
You must run a prune job to remove records before you use the dbdefrag
utility. Otherwise, the defrag will have nothing to do because there are no records
marked as deleted.
You can use the dbdefrag utility, followed by the keybuild utility, to compress
a database after running a prune job and to repair corruption caused by broken
links within VLDB entries (ex. A->B->C->...). If a link is corrupt or destroyed,
VLDB cannot access data. Running this utility may remove these broken links
and allow VLDB to access the data.
To run the dbdefrag utility, enter the following syntax:
Dbdefrag -a -L casdb;admin;secret [
DBNAME
]
DBNAME is the name of the database that you want to defrag (asjob, asmedia,
asobject, asrhost, astape, astpdrv, astpsdat, asmsg, asmsgdat, or aslogerr).
Keybuild—Use this utility only after you run the dbdefrag utility. This utility
repairs high-level key corruption.