Better Edge Backup v5.2
User Guide
Copyright © 2008, Better Edge Technology, Inc. All Rights Reserved.
Page 57 of 121 (September 16, 2008)
The block size defines the size of d ata block being used to detect the changes between the last full or delta
backup file and the file sitting on the local computer right now. In general, th e smaller the block size, th e more
likely a matched data block can be found between the last backup file and the file o n local computer. It, therefore,
produces a smaller delta file but it would require more processing power to detect these changes. On the other
hand, in-file delta backup running with large r block size will run faster but this will generally produce a larger delta
file.
In most case, the default setting [Auto] will choose the optimal block size for each file (depending on the size of
the file) for you.
8.3 Minimum File Size The [Minimum File Size] setting defines the smallest fi le size a file must have be fore the use and application of in-
file delta backup technology.
If the size of a fi le that is being backed up is smaller than the [Minimum File Size] setting, i n-file delta b ackup
technology won’t be applied to this file and the whole file, instead of just the delta file, will be uploaded to the
backup server. It is not ne cessary to perform in-file delta back up on small files be cause backing up the whole file
doesn’t take too long anyway. Backing up the whole file instead reduces the time required to restore a b ackup file.
8.4 Uploading full file again No. of Delta
The [No. of delta] setting defines the maximum number of delta files from the same full backup file to be
generated and backed u p to the backup server before a full backup (the whole fi le) of this file i s uploaded to the
backup server instead.
For example, if you ha ve created 100 delta files from the full b ackup file already an d the [No. of delta] setting is
set to 100, the next b ackup will upload a full ba ckup file (the whole file) instead of just the delta file. However, if
the [No. of delta] rule is disabled, it will keep generating delta files and uploading these delta files to the backup
server until the oth er delta rule forces a full backup (i.e. delta ratio exceeded). This setting is here to make sure
that there will always be a full backup file after a certain number of delta files have been g enerated.