Copyright © Acronis, Inc., 2000-2007 55
backup procedure may take quite long time. Therefore, the database idle time will be
minimal.
Before/after data capture commands
can also be used for purposes different from
suspending the database, especially if VSS support is enabled. You may want to suspend an
application other than a database, for example. The commands execution and the VSS
actions will be sequenced as follows:
“before” commands -> VSS Suspend -> data capture -> VSS Resume -> “after” commands.
Unchecking the
Do not perform operations until the commands execution is
complete
box, checked by default, will permit the backup process to run concurrently with
your commands execution.
6.3.5 Compression level
The preset is
Normal
.
If you select
None
, the data will be copied without any compression, which may significantly
increase the backup file size. However, if you select
Maximum
compression, the backup will
take longer to create.
The optimal data compression level depends on the type of files stored in the archive. For
example, even maximum compression will not significantly reduce the archive size if the
archive contains essentially compressed files, like .jpg, .pdf or .mp3.
Generally, it is recommended that you use the default
Normal
compression level. You might
want to select
Maximum
compression for removable media to reduce the number of blank
disks required.
6.3.6 Backup performance
The three options below might have a more or less noticeable effect on the backup process
speed. This depends on overall system configuration and physical characteristics of devices.
1. Backup process priority
The preset is
Low
.
The priority of any process running in a system determines the amount of CPU usage and
system resources allocated to that process. Decreasing the backup priority will free more
resources for other CPU tasks. Increasing the backup priority may speed up the backup
process due to taking resources from the other currently running processes. The effect will
depend on total CPU usage and other factors.
2. HDD writing speed
The preset is
Maximum
.
Backing up in the background to an internal hard disk (for example, to Acronis Secure Zone)
may slow other programs’ performance because of the large amounts of data transferred to
the disk. You can limit the hard disk usage by Acronis True Image Enterprise Server to a
desired level. To set the desired HDD writing speed for data being backed up, drag the slider
or enter the writing speed in kilobytes per second.
3. Network connection speed
The preset is
Maximum
.
