HP B6960-96035 User manual

HP Data Protector A.06.10
Concepts guide
B6960-96035
Part number: B6960-96035
First edition: November 2008

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Contents
Publication history .............................................................. 21
About this guide ................................................................. 23
Intended audience ............................................................................................. 23
Documentation set ............................................................................................. 23
Guides ...................................................................................................... 23
Online Help ............................................................................................... 26
Documentation map .................................................................................... 27
Abbreviations ...................................................................................... 27
Map ................................................................................................... 28
Integrations ......................................................................................... 29
Document conventions and symbols ..................................................................... 31
Data Protector graphical user interface ................................................................. 32
General information .......................................................................................... 33
HP technical support .......................................................................................... 33
Subscription service ........................................................................................... 34
HP websites ...................................................................................................... 34
Documentation feedback .................................................................................... 34
1 About backup and Data Protector ...................................... 35
In this chapter ................................................................................................... 35
About Data Protector ......................................................................................... 35
Introducing backups and restores ......................................................................... 38
What is a backup? ..................................................................................... 38
What is a restore? ...................................................................................... 39
Backing up a network environment ................................................................ 39
Direct backup ............................................................................................. 40
Data Protector architecture .................................................................................. 40
Operations in the cell .................................................................................. 42
Backup sessions .......................................................................................... 43
Restore sessions ......................................................................................... 44
Enterprise environments ...................................................................................... 45
Splitting an environment into multiple cells ...................................................... 45
Concepts guide 3

Media management .......................................................................................... 48
Backup devices ................................................................................................. 49
User interfaces .................................................................................................. 50
Data Protector GUI ...................................................................................... 50
Data Protector Java GUI ........................................................................ 52
Overview of tasks to set up Data Protector ............................................................ 55
2 Planning your backup strategy .......................................... 57
In this chapter ................................................................................................... 57
Backup strategy planning ................................................................................... 58
Defining the requirements of a backup strategy ............................................... 58
Factors influencing your backup strategy ........................................................ 60
Preparing a backup strategy plan ................................................................. 60
Planning cells .................................................................................................... 62
One cell or multiple cells? ............................................................................ 62
Installing and maintaining client systems ........................................................ 64
Creating cells in the UNIX environment .......................................................... 64
Creating cells in the Windows environment .................................................... 65
Windows domains ............................................................................... 65
Windows workgroups ........................................................................... 66
Creating cells in a mixed environment ........................................................... 66
Geographically remote cells ......................................................................... 66
Understanding and planning performance ............................................................ 67
The infrastructure ......................................................................................... 67
Network versus local backups ................................................................ 67
Network or server versus direct backups .................................................. 68
Devices ............................................................................................... 68
High performance hardware other than devices ........................................ 69
Advanced high performance configuration .............................................. 69
Using hardware in parallel .................................................................... 69
Configuring backups and restores ................................................................. 70
Software compression ........................................................................... 70
Hardware compression ......................................................................... 70
Full and incremental backups ................................................................. 71
Disk image versus filesystem backups ...................................................... 71
Object distribution to media ................................................................... 71
Disk performance ........................................................................................ 72
SAN performance ....................................................................................... 73
Online database application performance ..................................................... 73
Planning security ............................................................................................... 73
Cells ......................................................................................................... 74
Data Protector users accounts ....................................................................... 74
4

Data Protector user groups ........................................................................... 75
Data Protector user rights ............................................................................. 75
Visibility of backed up data .......................................................................... 76
Data encryption .......................................................................................... 76
How Data Protector AES 256-bit encryption works ................................... 76
How Data Protector drive-based encryption works ..................................... 77
Restore from encrypted backups ............................................................. 78
What is backup ownership? ......................................................................... 78
Clustering ......................................................................................................... 79
Cluster concepts ......................................................................................... 79
Cluster support ........................................................................................... 82
Example cluster environments ....................................................................... 83
Cell Manager installed outside a cluster .................................................. 83
Cell Manager installed outside a cluster, devices connected to the cluster
nodes ................................................................................................. 85
Cell Manager installed in a cluster, devices connected to the cluster
nodes ................................................................................................. 87
Full and incremental backups .............................................................................. 91
Full backups ............................................................................................... 92
Synthetic backup .................................................................................. 92
Incremental backups .................................................................................... 92
Conventional incremental backup ........................................................... 93
Enhanced incremental backup ................................................................ 93
Types of incremental backups ................................................................. 93
Considering restore ..................................................................................... 96
Keeping backed up data and information about the data ....................................... 99
Data protection ........................................................................................... 99
Catalog protection .................................................................................... 100
Logging level ........................................................................................... 100
Browsing files for restore ............................................................................ 100
Enabling the browsing of files and quick restore ..................................... 101
Enabling the restore of files, but not browsing ......................................... 101
Overwriting backed up files with new data ............................................ 101
Exporting media from a cell ................................................................. 102
Backing up data ............................................................................................. 102
Creating a backup specification .................................................................. 103
Selecting backup objects .......................................................................... 103
Backup sessions ........................................................................................ 105
Object mirrors .......................................................................................... 105
Media sets ............................................................................................... 105
Backup types and scheduled backups .......................................................... 105
Scheduling, backup configurations, and sessions ........................................... 106
Scheduling tips and tricks ........................................................................... 106
Concepts guide 5

When to schedule backups .................................................................. 107
Staggering full backups ....................................................................... 107
Optimizing for restore ......................................................................... 107
Automated or unattended operation ................................................................... 110
Considerations for unattended backups ....................................................... 110
Duplicating backed up data ............................................................................. 112
Copying objects ....................................................................................... 113
Why use object copy? ........................................................................ 116
Object mirroring ....................................................................................... 119
Copying media ........................................................................................ 122
Automated media copying ................................................................... 124
Smart media copying using VLS ........................................................... 124
Restoring data ................................................................................................ 125
Restore duration ........................................................................................ 125
Selection of the media set .......................................................................... 126
Selection of devices ................................................................................... 126
Operators are allowed to restore ................................................................ 127
End users are allowed to restore ................................................................. 128
Disaster recovery ............................................................................................. 128
Disaster recovery methods .......................................................................... 130
Alternative disaster recovery methods .................................................... 131
3 Media management and devices .................................... 133
In this chapter ................................................................................................. 133
Media management ........................................................................................ 133
Media life cycle .............................................................................................. 134
Media pools ................................................................................................... 135
Free pools ................................................................................................ 137
Media pool usage examples ...................................................................... 140
Implementing a media rotation policy .......................................................... 143
Media rotation and Data Protector ........................................................ 144
Media needed for rotation ................................................................... 144
Media management before backups begin ......................................................... 145
Initializing or formatting media ................................................................... 145
Labeling Data Protector media .................................................................... 145
Location field ............................................................................................ 146
Media management during backup sessions ....................................................... 147
Selecting media for backups ...................................................................... 147
Adding data to media during backup sessions .............................................. 148
Writing data to several media sets during backup ......................................... 150
Calculating media condition ....................................................................... 150
Media management after backup sessions .......................................................... 151
6

Vaulting ................................................................................................... 151
Restoring from media in a vault ................................................................... 153
Devices .......................................................................................................... 153
Device lists and load balancing .................................................................. 155
How load balancing works .................................................................. 156
Device streaming and concurrency .............................................................. 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
Handling of media .................................................................................... 162
Size of a library ........................................................................................ 162
Sharing a library with other applications ..................................................... 163
Enter / eject mail slots ............................................................................... 163
Barcode support ....................................................................................... 163
Cleaning tape support ............................................................................... 164
Sharing a library with multiple systems ........................................................ 164
Data Protector and Storage Area Networks ......................................................... 170
Storage Area Networks ............................................................................. 171
Fibre Channel .......................................................................................... 172
Point-to-point topology ......................................................................... 173
Loop topology .................................................................................... 173
Switched topology .............................................................................. 174
Device sharing in SAN .............................................................................. 175
Configuring multiple paths to physical devices ........................................ 175
Device locking ................................................................................... 177
Indirect and Direct Library Access ............................................................... 178
Indirect Library Access ........................................................................ 178
Direct Library Access .......................................................................... 179
Device sharing in clusters ........................................................................... 180
Static drives ....................................................................................... 180
Floating drives ................................................................................... 181
4 Users and user groups ................................................... 183
In this chapter ................................................................................................. 183
Increased security for Data Protector users .......................................................... 183
Access to backed up data .......................................................................... 183
Users and user groups ..................................................................................... 184
Using predefined user groups ..................................................................... 185
Concepts guide 7

Data Protector user rights ........................................................................... 185
5 The Data Protector internal database ............................... 187
In this chapter ................................................................................................. 187
About the IDB ................................................................................................. 187
The IDB on the Windows Cell Manager ....................................................... 188
The IDB on the UNIX Cell Manager ............................................................. 189
The IDB in the Manager-of-Managers environment ......................................... 189
IDB architecture ............................................................................................... 189
Media Management Database (MMDB) ...................................................... 190
Catalog Database (CDB) ........................................................................... 191
Detail Catalog Binary Files (DCBF) .............................................................. 192
Session Messages Binary Files (SMBF) ......................................................... 193
Serverless Integrations Binary Files (SIBF) ...................................................... 194
IDB operation ................................................................................................. 194
During backup .......................................................................................... 194
During restore ........................................................................................... 195
During object copying or object consolidation .............................................. 195
Exporting media ....................................................................................... 195
Removing the detail catalog ...................................................................... 196
Filenames purge ....................................................................................... 196
File versions purge .................................................................................... 196
Overview of IDB management ........................................................................... 196
IDB growth and performance ............................................................................ 197
Key IDB growth and performance factors ..................................................... 197
IDB growth and performance: key tunable parameters ................................... 198
Logging level as an IDB key tunable parameter ...................................... 199
Catalog protection as an IDB key tunable parameter ............................... 201
Recommended usage of logging level and catalog protection .................. 201
IDB size estimation ................................................................................... 203
6 Service management ..................................................... 205
In this chapter ................................................................................................. 205
Overview ....................................................................................................... 205
Data Protector and service management ...................................................... 206
Native Data Protector functionality ..................................................................... 207
Application Response Measurement version 2.0 (ARM 2.0 API) ....................... 208
Integration with HP Operations Manager software ........................................ 210
SNMP traps ............................................................................................. 210
The monitor .............................................................................................. 210
Reporting and notification .......................................................................... 211
Event logging and notification .................................................................... 212
8

Data Protector log files ........................................................................ 213
Windows application log ........................................................................... 213
Java-based online reporting ....................................................................... 213
Data Protector checking and maintenance mechanism ................................... 214
Central management, distributed environment ............................................... 214
Using the data provided by Data Protector ................................................... 214
Service management integrations ...................................................................... 215
Data Protector OM-R integration ................................................................. 215
Data Protector OM SIP .............................................................................. 217
7 How Data Protector operates .......................................... 219
In this chapter ................................................................................................. 219
Data Protector processes or services ................................................................... 219
Backup sessions .............................................................................................. 220
Scheduled and interactive backup sessions ................................................... 221
Backup session data flow and processes ...................................................... 221
Pre-exec and post-exec commands .............................................................. 223
Queuing of backup sessions ....................................................................... 224
Mount requests in backup sessions .............................................................. 224
Backing up with disk discovery ................................................................... 225
Restore sessions ............................................................................................... 225
Restore session data flow and processes ...................................................... 226
Queuing of restore sessions ........................................................................ 227
Mount requests in a restore session .............................................................. 228
Parallel restores ......................................................................................... 228
Fast multiple single file restore .................................................................... 229
Object copy sessions ....................................................................................... 229
Automated and interactive object copy sessions ............................................ 230
Object copy session data flow and processes ............................................... 230
Queuing of object copy sessions ................................................................. 232
Mount requests in an object copy session ..................................................... 232
Object consolidation sessions ........................................................................... 233
Automated and interactive object consolidation sessions ................................ 233
Object consolidation session data flow and processes ................................... 233
Queuing of object consolidation sessions ..................................................... 234
Mount requests in an object consolidation session ......................................... 235
Media management sessions ............................................................................ 235
Media management session data flow ......................................................... 235
8 Integration with database applications ............................. 237
In this chapter ................................................................................................. 237
Overview of database operation ....................................................................... 237
Concepts guide 9

Filesystem backup of databases and applications ................................................ 239
Online backup of databases and applications .................................................... 239
9 Direct backup ............................................................... 243
In this chapter ................................................................................................. 243
Overview ....................................................................................................... 243
Direct backup ........................................................................................... 244
Direct backup benefits ......................................................................... 245
How direct backup works ........................................................................... 245
Environment ....................................................................................... 246
About resolve ..................................................................................... 247
About XCopy ..................................................................................... 247
XCopy + Resolve ................................................................................ 248
Direct backup process flow ......................................................................... 248
Backup stages for data files ................................................................. 248
Restore .............................................................................................. 249
Requirements and support ................................................................................ 249
Supported configurations .................................................................................. 250
Three hosts: CM, application, Resolve .......................................................... 250
Two Hosts: Cell Manager/Resolve Agent and application .............................. 251
Basic configuration: single host ................................................................... 251
10 Disk backup ................................................................ 253
In this chapter ................................................................................................. 253
Overview ....................................................................................................... 253
Disk backup benefits ........................................................................................ 254
Data Protector disk-based devices ...................................................................... 255
11 Synthetic backup .......................................................... 257
In this chapter ................................................................................................. 257
Overview ....................................................................................................... 257
Synthetic backup benefits ................................................................................. 258
How Data Protector synthetic backup works ........................................................ 258
Synthetic backup and media space consumption ........................................... 260
Restore and synthetic backup ............................................................................ 260
How data protection periods affect restore from synthetic backup .................... 262
12 Split mirror concepts .................................................... 265
In this chapter ................................................................................................. 265
Overview ....................................................................................................... 265
Supported configurations .................................................................................. 269
10

Local mirror - dual host .............................................................................. 269
Local mirror - single host ............................................................................ 270
Remote mirror ........................................................................................... 270
Local/remote mirror combination ................................................................ 272
Other configurations ................................................................................. 273
13 Snapshot concepts ....................................................... 275
In this chapter ................................................................................................. 275
Overview ....................................................................................................... 275
Storage virtualization ................................................................................. 275
Snapshot concepts .................................................................................... 276
Snapshot backup types .............................................................................. 278
Instant recovery ........................................................................................ 279
Replica set and replica set rotation .............................................................. 279
Types of snapshots .................................................................................... 279
Supported configurations .................................................................................. 281
Basic configuration: single disk array - dual host ........................................... 281
Other supported configurations ................................................................... 282
Other configurations ................................................................................. 286
14 Microsoft Volume Shadow Copy service .......................... 289
In this chapter ................................................................................................. 289
Overview ....................................................................................................... 289
Data Protector Volume Shadow Copy integration ................................................. 293
VSS filesystem backup and restore ..................................................................... 295
A Backup scenarios .......................................................... 297
In this appendix .............................................................................................. 297
Considerations ......................................................................................... 297
Company XYZ ................................................................................................ 299
Environment ............................................................................................. 299
Backup strategy requirements ..................................................................... 302
Proposed solution ...................................................................................... 303
Company ABC ................................................................................................ 313
Environment ............................................................................................. 313
Backup strategy requirements ..................................................................... 315
Proposed solution ...................................................................................... 317
B Further information ........................................................ 331
In this appendix .............................................................................................. 331
Backup generations ........................................................................................ 331
Concepts guide 11

Examples of automated media copying .............................................................. 332
Example 1: automated media copying of filesystem backups ........................... 333
Incr1 backup ..................................................................................... 333
Full backup ........................................................................................ 335
Example 2: automated media copying of Oracle database backups ................ 338
Full backup ........................................................................................ 339
Internationalization .......................................................................................... 340
Localization .............................................................................................. 340
File name handling ................................................................................... 341
Background ....................................................................................... 341
File name handling during backup ........................................................ 342
Browsing file names ............................................................................ 342
File name handling during restore ......................................................... 342
Glossary ......................................................................... 345
Index .............................................................................. 403
12

Figures
Data Protector graphical user interface ............................................... 331
Backup process ............................................................................... 392
Restore process ............................................................................... 393
Network backup .............................................................................. 404
The Data Protector cell (physical view and logical view) ....................... 415
Backup or restore operation .............................................................. 436
Backup session ................................................................................ 447
Restore session ................................................................................ 448
Large Data Protector enterprise environment ........................................ 459
Single-point management of multiple cells ........................................... 4610
Manager-of-Managers environment .................................................... 4711
How backup specifications, devices, and media pools are related ......... 4912
Using the Data Protector user interface ............................................... 5013
Original Data Protector GUI .............................................................. 5214
Data Protector Java GUI ................................................................... 5215
Data Protector Java GUI architecture .................................................. 5316
Backup session with AES 256-bit encryption ........................................ 7717
Backup session with drive-based encryption ........................................ 7818
Typical cluster ................................................................................. 8019
Cell Manager installed outside a cluster ............................................. 8420
Cell Manager installed outside a cluster, devices connected to the cluster
nodes ............................................................................................ 86
21
Cell Manager installed in the cluster, devices connected to cluster
nodes ............................................................................................ 89
22
Concepts guide 13

Incremental backups ........................................................................ 9523
Leveled incremental backups ............................................................. 9524
Media needed to restore from simple and leveled incremental
backups ......................................................................................... 98
25
Media needed to restore from leveled incremental backups ................... 9826
Backup session .............................................................................. 10227
Full backup with daily simple incremental backups ............................. 10828
Full backup with daily level 1 incremental backups ............................. 10929
Full backup with mixed incremental backups ..................................... 11030
Object copy concept .................................................................... 11431
Freeing media .............................................................................. 11732
Demultiplexing a medium ............................................................... 11833
Disk staging concept ..................................................................... 11934
Object mirroring ............................................................................ 12135
Free pools .................................................................................... 13836
A simple one device/one media pool relation ................................... 14037
Configuration of media pools for large libraries ................................. 14138
Multiple devices, single media pool ................................................. 14239
Multiple devices, multiple media pools ............................................. 14340
Multiple objects and sessions per medium, sequential writes ................ 14941
Multiple objects and sessions per medium, concurrent writes ............... 14942
Multiple media per session, multiple media per object ........................ 14943
Each object written on a separate medium ........................................ 15044
Data format .................................................................................. 15845
Device locking and device names .................................................... 16046
Connecting drives to multiple systems ............................................... 16547
Sharing a SCSI library (robotics attached to a Data Protector Client
System) ........................................................................................ 168
48
Sharing a SCSI library (robotics attached to an NDMP Server) ............ 16949
14

Sharing an ADIC/GRAU or StorageTek ACS library ........................... 17050
Storage Area Network ................................................................... 17251
Loop initialization protocol .............................................................. 17452
Example multipath configuration ...................................................... 17653
Indirect Library Access ................................................................... 17954
Direct Library Access ...................................................................... 18055
IDB parts ...................................................................................... 19056
The influence of logging level and catalog protection on IDB growth .... 19957
Service management information flow .............................................. 20758
Example of an IT service provider environment with service management
access through the client portal ....................................................... 215
59
Data Protector Reporter example ..................................................... 21660
Operational error status report ........................................................ 21761
Direct SIP integration example ......................................................... 21862
Backup session information flow (1) .................................................. 22263
Backup session information flow - multiple sessions ............................. 22364
Restore session information flow ...................................................... 22765
Parallel restore session flow ............................................................. 22966
Object copy session information flow .............................................. 23267
Relational database ....................................................................... 23868
Data Protector integration with databases ......................................... 24069
Direct backup architecture .............................................................. 24670
Basic three host configuration .......................................................... 25171
Synthetic backup ........................................................................... 25972
Virtual full backup .......................................................................... 26073
Full and incremental backups .......................................................... 26174
Synthetic backup ........................................................................... 26175
Regular synthetic backup ................................................................ 26276
Synthetic backup and object copy .................................................... 26277
Concepts guide 15

Split mirror backup concept ............................................................ 26678
Local mirror - dual host (full performance, Zero Downtime Backup) ....... 26979
Split mirror - remote mirror (LAN-free remote backup - data HA) ........... 27180
Local/remote mirror combination (disaster recovery integrated backup
[Service HA - HP-UX only]) .............................................................. 272
81
Snapshot backup ........................................................................... 27782
Single disk array - dual host (full performance, Zero Downtime
Backup) ........................................................................................ 281
83
Multiple disk arrays - dual host ........................................................ 28284
Multiple application hosts - single backup host .................................. 28385
Disk array(s) - single host ................................................................ 28486
LVM mirroring - HP StorageWorks Virtual Array only .......................... 28587
Campus Cluster with LVM Mirroring - HP StorageWorks Virtual Array
only ............................................................................................. 286
88
Actors of the traditional backup model ............................................. 29289
Actors of the VSS backup model ...................................................... 29290
Current XYZ backup topology .......................................................... 30091
Proposed XYZ backup topology ....................................................... 30592
Input parameters ........................................................................... 30693
Results .......................................................................................... 30694
Current ABC Cape Town backup topology ........................................ 31495
ABC enterprise environment ............................................................ 31896
ABC Cape Town enterprise backup environment ................................ 32197
Input parameters ........................................................................... 32298
Results .......................................................................................... 32299
Backup generations ....................................................................... 332100
Incr1 backup and automated media copying .................................... 335101
Full backup and automated media copying ....................................... 337102
Overview of backup and automated media copy sessions ................... 338103
Full database backup and automated media copying ......................... 339104
16

Overview of backup and automated media copy sessions ................... 340105
Concepts guide 17

Tables
Edition history ................................................................................. 211
Document conventions ...................................................................... 312
Backup behavior ............................................................................. 853
Backup behavior ............................................................................. 874
Backup behavior ............................................................................. 905
Comparison of full and incremental backup ........................................ 916
Relative referencing of backup runs .................................................... 957
The staggered approach ................................................................ 1078
Data Protector data duplication methods .......................................... 1129
Required Data Protector Media Agent for drive control ....................... 16610
Required Data Protector Media Agent for robotic control ..................... 16711
Data Protector predefined user groups .............................................. 18512
ARM functionality .......................................................................... 20913
Benefits of using VSS ..................................................................... 29314
Hardware and software environment of XYZ ...................................... 29915
Proposed environment .................................................................... 30316
The staggering approach ................................................................ 30817
Remote full backups to the HP DLT 4115 library .................................. 30918
Size of backup environment ............................................................ 31319
Maximum acceptable downtime for recovery .................................... 31520
How long data should be kept ........................................................ 31621
Amount of data to be backed up ..................................................... 31622
Amount of data to be backed up in five years ................................... 31723
ABC cell configuration ................................................................... 31924
18

ABC’s Media Pool Usage ............................................................... 32525
The Staggering Approach for ABC Cape Town .................................. 32626
ABC’s backup specification configuration ......................................... 32727
Concepts guide 19

20