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.
Summary of Contents for Backup & Recovery Server OEM
Page 1: ...User s Guide...
