HP D2D .HP D2D Backup System user guide (EH985-90907, March 2011) - Page 179

Glossary

Get HP D2D PDF manuals and user guides View all HP D2D manuals
Add to My Manuals
Save this manual to your list of manuals

Page 179 highlights

Glossary Autoloaders Backup devices and slots CIFS Deduplication An autoloader is a Virtual Tape Device that has a single tape drive and multiple storage slots. (A library has multiple tape drives.) Each storage slot contains a cartridge that can be allocated to a specific backup task; for example, one cartridge can hold Monday's data, another can hold Tuesday's data, and so on. In this way, backup applications are able to implement tape rotation strategies that accommodate differing backup requirements for daily, weekly, monthly, yearly backups. See Virtual Tape Devices. Common Internet File System (CIFS) is a protocol for interfacing to hosts on a Windows network. The HP StoreOnce Backup System supports this interface for connecting to NAS targets from a Windows network. Data deduplication compares blocks of data being written to the backup device with data blocks previously stored on the device. If duplicate data is found, a pointer is established to the original data, rather than storing the duplicate data sets. This removes, or "deduplicates," the redundant blocks. See also the HP StoreOnce Backup System Concepts Guide. The main benefit of deduplication is that it is possible to store more data and retain data for longer on each device. The host using the device has access to a greater depth of historical data that would otherwise have been archived offline. Emulation types Figure 56 Data stored after deduplication . HP StoreOnce products emulate a range of physical Tape Autoloaders or Tape Libraries. Supported emulation types are listed below: • HP 1x8 G2 Autoloader (HP D2D2500) • HP MSL2024 Library Backup System user guide 179

  • 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
Glossary
Autoloaders
An autoloader is a Virtual Tape Device that has a single tape drive and multiple
storage slots. (A library has multiple tape drives.) Each storage slot contains a
cartridge that can be allocated to a specific backup task; for example, one
cartridge can hold Monday's data, another can hold Tuesday's data, and so
on. In this way, backup applications are able to implement tape rotation strategies
that accommodate differing backup requirements for daily, weekly, monthly,
yearly backups.
Backup devices
and slots
See
Virtual Tape Devices
.
CIFS
Common Internet File System (CIFS) is a protocol for interfacing to hosts on a
Windows network. The HP StoreOnce Backup System supports this interface for
connecting to NAS targets from a Windows network.
Deduplication
Data deduplication compares blocks of data being written to the backup device
with data blocks previously stored on the device. If duplicate data is found, a
pointer is established to the original data, rather than storing the duplicate data
sets. This removes, or
“
deduplicates,
”
the redundant blocks. See also the
HP
StoreOnce Backup System Concepts Guide
.
The main benefit of deduplication is that it is possible to store more data and
retain data for longer on each device. The host using the device has access to
a greater depth of historical data that would otherwise have been archived
offline.
Figure 56 Data stored after deduplication
.
Emulation types
HP StoreOnce products emulate a range of physical Tape Autoloaders or Tape
Libraries. Supported emulation types are listed below:
•
HP 1x8 G2 Autoloader (HP D2D2500)
•
HP MSL2024 Library
Backup System user guide
179