ACRONIS Backup & Recovery 10 Advanced Server, UR, AAS, RNW, L2, 500-1249u, FRE User's Guide Page 147
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ToH Example 1
Suppose, the backup plan has the following tape options:
the Use a separate tape set option is selected
the Always use a free tape: For each full backup option is cleared
the Always use a free tape: For each incremental backup option is cleared
the Always use a free tape: For each differential backup option is cleared.
The figure below shows the tapes’ usage for the ToH scheme combined with the above mentioned
tape options. The recurring part of the scheme contains sixteen backup sessions. The figure displays
the backup archive state at the moment when the 17th session is finished.
As the Tower of Hanoi backup scheme forces presence of only one backup on each level, all the
outdated backups are deleted automatically. In the next figure the deleted backups are drawn as
dark-gray rectangles. Actually the deleted backup is still stored on the tapes, but the information
about it is deleted from the storage node database.
The figure shows the full backup kept on tape 01 at the moment, which cannot be deleted as it is a
base for actual differential (D, C, B) and incremental (A) backups stored on tape 02. The full backup
deletion is postponed until all the above mentioned four backups will be deleted.
The next figure demonstrates the tapes’ content at the moment before creation of the new backup
on level D:
At the moment the data archive occupies four tapes, and the total size of the backups written up to
the current time is maximal for the example. However, if in the future a full backup will be written at
the end of a tape, the archive will occupy five tapes.
After the next backup is created on level D, tape 01 is freed and can be reused.
It is noticed that the ToH scheme combined with the specified options has the following properties
for the analyzed case:
the last figure shows that the data recovery requires loading and mounting of up to three tapes
(one tape - 16%, two tapes - 72%, three tapes - 12%) as well as rewinding and reading of one
(6%), two (50%) or three (44%) backups
- Advanced Workstation 1
- Table of contents 3
- 1.2 Getting started 9
- Navigation tree 12
- Shortcuts bar 13
- Actions 14
- How to expand/minimize panes 14
- "Tasks" view 15
- Action pages 16
- Console 17
- 1.3.1 Agent for Windows 18
- 1.3.2.1 Management Server 19
- 1.3.2.2 Storage Node 20
- 1.3.3 Management Console 21
- 1.4 Supported file systems 22
- Acronis License Server 23
- 10 Storage Node 23
- 1.6 System requirements 24
- 1.7 Technical Support 25
- 2.1 Basic concepts 26
- Backup using bootable media 28
- Full backup 30
- Incremental backup 31
- Differential backup 31
- 2.4 Owners and credentials 32
- 2.5 GFS backup scheme 33
- GFS by Acronis 34
- The resulting archive: ideal 35
- The resulting archive: real 36
- Tower of Hanoi overview 37
- Tower of Hanoi by Acronis 38
- 2.7 Retention rules 39
- 1. Delete backups older than 40
- Combination of rules 1 and 2 41
- Best practices 42
- Backing up dynamic volumes 42
- Recovering dynamic volumes 43
- 2.9 Tape support 44
- 2.10 Support for SNMP 46
- 2.11.1 Acronis Secure Zone 47
- Limitation 48
- Restore) 49
- Limitations 50
- Getting Universal Restore 50
- Supported operating systems 50
- How it works 51
- Usage scenarios 51
- How to use 51
- 2.12.1 Basic concepts 52
- Setting up the storage node 55
- Policy on a machine 58
- Policy on a group 58
- Backup policy state diagram 62
- 2.12.6 Deduplication 64
- Deduplication database 65
- Deduplication at source 65
- Deduplication at target 66
- Compacting 66
- What ratio to expect 67
- Local connection 69
- Remote connection 69
- On a domain controller 70
- Remote Agent ports 75
- Client Encryption options 75
- Server Encryption options 76
- The default port (9876) 77
- The currently used port 77
- 2.12.8.5 SSL certificates 78
- Non-self-signed certificates 79
- 3 Options 80
- 3.1.3 Time-based alerts 81
- 3.1.4 Number of tasks 81
- 3.1.5 Fonts 81
- 3.2.1 Logging level 82
- 3.2.2 Log cleanup rules 82
- 3.2.3 Event tracing 83
- 3.2.5 Acronis WOL Proxy 84
- 3.2.6 VM protection options 84
- 3.2.7 Online backup proxy 85
- 3.3 Machine options 86
- 3.3.2 Event tracing 87
- 3.3.3 Log cleanup rules 89
- 3.3.4 Online backup proxy 89
- 3.4.1.1 Archive protection 92
- 3.4.1.3 Pre/Post commands 94
- Pre-backup command 95
- Post-backup command 95
- Pre-data capture command 96
- Post-data capture command 97
- Always create a snapshot 98
- Do not create a snapshot 98
- 3.4.1.8 Compression level 99
- 3.4.1.9 Backup performance 100
- Backup priority 100
- HDD writing speed 100
- Network connection speed 101
- 3.4.1.10 Notifications 101
- Messenger service (WinPopup) 102
- SNMP notifications 103
- 3.4.1.11 Event tracing 103
- Windows event log 103
- 3.4.1.13 Backup splitting 104
- Fixed size 105
- 3.4.1.15 Media components 106
- 3.4.1.16 Error handling 106
- 3.4.1.17 Dual destination 107
- Skip the task execution 108
- 3.4.1.20 Tape support 109
- Always use a free tape 110
- Reset archive bit 111
- Use FTP in Active mode 112
- 3.4.2.1 Pre/Post commands 114
- Pre-recovery command 114
- Post-recovery command 115
- 3.4.2.2 Recovery priority 115
- 3.4.2.3 File-level security 116
- 3.4.2.4 Notifications 116
- 3.4.2.5 Event tracing 117
- 3.4.2.6 Error handling 119
- 3.4.2.7 Additional settings 119
- 4 Vaults 121
- 4.1 Centralized vaults 122
- Vault toolbar 123
- Pie chart with legend 123
- Vault content 123
- Vault path 126
- Vault database path 127
- Vault encryption 127
- 4.1.3 Tape libraries 129
- 4.1.3.2 Hardware 130
- 4.1.3.3 Limitations 130
- 4.1.3.4 RSM Media Pools 131
- Prerequisites 132
- Backing up to tape library 133
- Recovering from tape library 134
- Inventory 135
- Labeling 136
- 4.1.3.7 Tape support 136
- 4.1.3.8 Tape rotation 137
- Choosing a backup scheme 138
- Criteria of the choice 138
- Case to analyze 139
- GFS Example 1 140
- GFS Example 2 143
- GFS Example 3 145
- ToH Example 1 147
- ToH Example 2 148
- ToH Example 3 149
- Tape planning 149
- Tape planning: Example 1 150
- Tape planning: Example 2 151
- 4.1.3.9 What if 151
- 4.2 Personal vaults 152
- Metadata 153
- 4.3 Common operations 155
- To show or hide columns 158
- 5 Scheduling 159
- 5.1 Daily schedule 160
- Examples 161
- 5.2 Weekly schedule 162
- 5.3 Monthly schedule 164
- Use Wake-On-LAN 167
- Parameters 168
- 5.7 Conditions 170
- 5.7.1 User is idle 171
- 5.7.3 Fits time interval 172
- 5.7.4 User logged off 173
- 6 Direct management 174
- Activities 175
- System view 176
- Way of working 176
- Backup plan execution states 177
- Backup plan statuses 177
- Task states 178
- Task statuses 179
- Backup plan (p. 189) 180
- Recovery task (p. 213) 180
- Validation task (p. 233) 180
- Run backup plan 184
- Task details 184
- Archive 185
- Settings 185
- Backup plan details 186
- 6.1.3 Log 187
- 6.2 Creating a backup plan 189
- General 190
- What to backup 190
- Where to back up 190
- How to back up 191
- Archive validation 191
- Backup options 191
- Convert to VM 191
- 6.2.3 Source type 192
- 6.2.4 Items to back up 193
- 6.2.6 Exclusions 195
- 6.2.7 Archive 196
- 6.2.8.1 Usage examples 198
- 6.2.8.2 The [DATE] variable 201
- 6.2.10 Backup schemes 202
- 6.2.10.3 Simple scheme 203
- At a glance 206
- Example 207
- Roll-back period 207
- 6.2.10.7 Initial seeding 211
- 6.2.11 Archive validation 212
- 6.3 Recovering data 213
- What to recover 214
- Where to recover 215
- When to recover 215
- Recovery options 215
- 6.3.1 Task credentials 216
- 6.3.2 Archive selection 216
- 6.3.3 Data type 217
- 6.3.4 Content selection 217
- 6.3.4.2 Files selection 218
- 6.3.6 Destination selection 219
- Disk destination 220
- NT signature 220
- 6.3.6.2 Volumes 221
- MBR destination 222
- Volume destination 222
- Volume properties 222
- 6.3.6.5 File destination 224
- Recovery exclusions 225
- Overwriting 225
- 6.3.8 When to recover 226
- 6.3.9 Universal Restore 226
- Universal Restore settings 227
- Post-conversion operations 229
- Windows NT/2000/XP/2003 232
- Windows Vista/2008 232
- 6.4.1 Task credentials 234
- 6.4.2 Archive selection 234
- 6.4.3 Backup selection 235
- 6.4.4 Location selection 236
- 6.5 Mounting an image 237
- 6.5.1 Archive selection 238
- 6.5.2 Backup selection 239
- 6.5.3 Access credentials 239
- 6.5.4 Volume selection 239
- 6.6 Managing mounted images 240
- What to export 242
- 6.7.1 Task credentials 243
- 6.7.2 Archive selection 243
- 6.7.3 Backup selection 244
- 6.7.5 Location selection 245
- 2. Using the archives table 246
- 3. Naming the new archive 246
- 6.8 Acronis Secure Zone 247
- 6.8.1.4 Result confirmation 248
- Activate 250
- 6.10 Bootable media 251
- Linux-based bootable media 252
- PE-based bootable media 252
- Using Bart PE 253
- Kernel parameters 254
- Network settings 255
- Network port 256
- To add an iSCSI device 261
- To add an NDAS device 261
- Linux commands and utilities 262
- Mounting backup volumes 266
- 6.10.6 Acronis PXE Server 267
- 6.11 Disk management 268
- 6.11.1 Basic precautions 269
- Starting the operations 270
- Displaying operation results 270
- 6.11.5 Disk operations 271
- 6.11.5.2 Basic disk cloning 272
- Using advanced options 273
- System disk conversion 275
- 6.11.6 Volume operations 277
- Create volume wizard 278
- Select destination disks 279
- Set the volume size 279
- Set the volume options 280
- 6.11.6.2 Delete volume 281
- 6.11.6.3 Set active volume 281
- 6.11.6.6 Format volume 282
- 6.11.7 Pending operations 283
- 7 Centralized management 285
- 7.1.2 Backup policies 287
- Machines selection 290
- 7.1.2.4 Policy details 291
- 7.1.3 Physical machines 292
- 7.1.3.1 Actions on machines 293
- Applying policies 294
- Grouping actions 294
- Other actions 295
- To add a machine 296
- Text file requirements 297
- Adding machines to a group 299
- Machine details 299
- Plans and tasks 301
- Inheritance order 304
- 7.1.3.2 Actions on groups 305
- To create a group 306
- Operating system 306
- IP address range 306
- Adding multiple criteria 307
- Move one group to another 308
- Editing custom groups 308
- Group details 309
- 7.1.4 Virtual machines 310
- Grouping of virtual machines 311
- Host/VA 312
- 7.1.5 Storage nodes 315
- Adding a storage node 317
- 7.1.6 Tasks 318
- 7.1.6.1 Actions on tasks 319
- 7.1.7 Log 321
- Configuring the log table 323
- 7.1.8 Reporting 324
- Generating reports 325
- Filters 325
- Report view 326
- Report coverage 328
- 7.1.8.8 Column selection 329
- 7.1.8.9 Report view 329
- Connection parameters 342
- Event tracing parameters 343
- What to back up 347
- 7.3.1 Policy credentials 349
- 7.3.2 Items to back up 349
- Names for logical volumes 352
- Windows 353
- To specify credentials 354
- 7.3.4 Exclusions 355
- 7.3.5 Archive 356
- 7.3.7.1 Back up now scheme 358
- 7.3.7.3 Simple scheme 358
- Description 359
- 7.3.8 Archive validation 367
- 8 Online backup 369
- Server uses a free license 371
- 8.1.7 Initial Seeding FAQ 372
- Hard drive types 374
- Packaging 374
- To renew a subscription 380
- 8.2 Where do I start? 381
- 8.3 Choosing a subscription 381
- Trial subscriptions 382
- Operations 385
- Backup and recovery options 385
- 8.7 Terminology reference 386
- 9 Glossary 388
- Backup plan (Plan) 390
- Backup policy (Policy) 390
- Backup scheme 391
- Bootable agent 391
- Bootable media 391
- Built-in group 391
- Centralized backup plan 392
- Centralized management 392
- Centralized task 392
- Centralized vault 392
- Direct management 394
- Disk backup (Image) 394
- Disk group 394
- Dynamic disk 395
- Dynamic group 395
- Dynamic volume 396
- Encrypted archive 396
- Encrypted vault 396
- Managed vault 398
- Media builder 398
- Personal vault 398
- Physical machine 398
- Storage node-side cleanup 400
- Storage node-side validation 400
- Tower of Hanoi 400
- Unmanaged vault 401
- Validation 401
- Validation rules 401
- Virtual machine 402
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