Deonet Backup Solutions 5.2.7.0 - Manual (Page 58)

Better Edge Backup v5.2
User Guide
Copyright © 2008, Better Edge Technology, Inc. All Rights Reserved. Page 58 of 121 (September 16, 2008)
Delta Ratio
The [Delta Ratio] setting is defined to be the size of a delta file divided by the size of its full backup file (i.e. the
percentage of changes detected between the last full backup file and the current file).
If the delta ratio calculated from the size of the generated delta file and the size of the full backup file is greater
than the [Delta Ratio] setting, the whole file, instead of just the delta file, will be backed up to the backup server.
It is done this way because the difference between backing up the whole file and the delta file is not significant
and it is better to upload the whole file instead to reduce the time required to restore the file.
The default setting of [Delta Ratio] is 50%. This means that if a file changes by more than 50%, the whole file,
instead of just the delta file, will be backed up and uploaded to the backup server.
8.5 Advanced In-file delta type
The [In-file delta] -> [Advanced] setting allows users to override default in-file delta type when on a certain
number of days (e.g. all Sundays or the 1
st day of each month). This is useful if you want all in-file delta backups
to be incremental but you want to do a differential in-file delta backup on Saturdays as well as the full file backups
on the 1
st day of every month. If you want to do this, simply configure [In-file delta] -> [Advanced] -> [Advanced
In-file Delta Type Setting] to what is shown below.
With this setting, all backup Jobs on Saturdays will be differential in-file delta backups, backups for the 1 st day of
each month will run a full backup. This ensures that all backup files will be backed up in full at a regular interval.
One benefit of this is that restore time will run faster because of less delta merging. Another benefit is that the
risk of a corrupted incremental delta file resulting in data loss is much lower because a full backup is always
available periodically.