D-Link DNS-1250-04 Acronis Backup Software User Manual for DNS-1250-04 - Page 37

Compression level

Get D-Link DNS-1250-04 PDF manuals and user guides View all D-Link DNS-1250-04 manuals
Add to My Manuals
Save this manual to your list of manuals

Page 37 highlights

Data consistency, in turn, ensures that the application will be recovered in the correct state and become operational immediately after recovery. The preset is: Create snapshots using VSS Acronis Backup & Recovery Server OEM will select the VSS provider automatically based on the operating system running on the machine and whether the machine is a member of an Active Directory domain. Create snapshots without using VSS Choose this option if your database is incompatible with VSS. The data snapshot will be taken by Acronis Backup & Recovery Server OEM. Backup process is fastest, but data consistency of the applications whose transactions are not completed at the time of taking a snapshot cannot be guaranteed. You may use Pre/Post data capture commands to indicate which commands should be performed before and after taking the snapshot, to ensure that the data is being backed up in a consistent state. For instance, specify pre-data capture commands that will suspend the database and flush all caches to ensure that all transactions are completed; and specify post-data capture commands that will resume the database operations after the snapshot is taken. Volume shadow copy writers Before backing up the data of VSS-aware applications, make sure that the volume shadow copy writers for those applications are turned on, by examining the list of writers that are present in the operating system. To view this list, run the following command: vssadmin list writers Note: In Microsoft Windows Small Business Server 2003, the writer for Microsoft Exchange Server 2003 is turned off by default. For instructions on how to turn it on, see the corresponding Microsoft Help and Support article http://support.microsoft.com/kb/838183/en. 3.3.1.6 Compression level This option is effective for Windows operating systems and bootable media. The option defines the level of compression applied to the data being backed up. The preset is: Normal. The optimal data compression level depends on the type of data being backed up. For example, even maximum compression will not significantly reduce the archive size if the archive contains essentially compressed files, such as .jpg, .pdf or .mp3. However, formats such as .doc or .xls will be compressed well. To specify the compression level Select one of the following:  None - the data will be copied as is, without any compression. The resulting backup size will be maximal.  Normal - recommended in most cases.  High - the resulting backup size will typically be less than for the Normal level.  Maximum - the data will be compressed as much as possible. The backup duration will be maximal. You may want to select maximum compression when backing up to removable media to reduce the number of blank disks required.

  • 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
Data consistency, in turn, ensures that the application will be recovered in the correct state and
become operational immediately after recovery.
The preset is:
Create snapshots using VSS
Acronis Backup & Recovery Server OEM will select the VSS provider automatically based on the
operating system running on the machine and whether the machine is a member of an Active
Directory domain.
Create snapshots without using VSS
Choose this option if your database is incompatible with VSS. The data snapshot will be taken by
Acronis Backup & Recovery Server OEM. Backup process is fastest,
but data consistency of the
applications whose transactions are not completed at the time of taking a snapshot cannot be
guaranteed. You may use Pre/Post data capture commands to indicate which commands should be
performed before and after taking the snapshot, to ensure that the data is being backed up in a
consistent state. For instance, specify pre-data capture commands that will suspend the database
and flush all caches to ensure that all transactions are completed; and specify post-data capture
commands that will resume the database operations after the snapshot is taken.
Volume shadow copy writers
Before backing up the data of VSS-aware applications, make sure that the volume shadow copy
writers for those applications are turned on, by examining the list of writers that are present in the
operating system. To view this list, run the following command:
vssadmin list writers
Note:
In Microsoft Windows Small Business Server 2003, the writer for Microsoft Exchange Server 2003 is
turned off by default. For instructions on how to turn it on, see the corresponding Microsoft Help and Support
3.3.1.6
Compression level
This option is effective for Windows operating systems and bootable media.
The option defines the level of compression applied to the data being backed up.
The preset is:
Normal.
The optimal data compression level depends on the type of data being backed up. For example, even
maximum compression will not significantly reduce the archive size if the archive contains essentially
compressed files, such as .jpg, .pdf or .mp3. However, formats such as .doc or .xls will be compressed
well.
To specify the compression level
Select one of the following:
None
– the data will be copied as is, without any compression. The resulting backup size will be
maximal.
Normal
– recommended in most cases.
High
– the resulting backup size will typically be less than for the
Normal
level.
Maximum
– the data will be compressed as much as possible. The backup duration will be
maximal. You may want to select maximum compression when backing up to removable media
to reduce the number of blank disks required.