I've noticed strange behavior of the .vbk file.
It slowly grows each time VEB makes incremental backup merge, even if increment has info about deletions only.
I've spotted it for my full PC backup first (it slowly growed from 740 GB up to the 769 GB in ~1 month).
And I decided to make a small experiment and configure a backup with such settings:
- for folder with one small file (14kb)
- keep restore point for the last 1
- disabled all other settings: http://i.imgur.com/uBBZD2g.png
And started experiment.
I've made a backup for the first time, resulting backup file:
Next I've duplicated that 14kb file multiple times, made few incremental backups in a row (each about 30mb in size) changed date to the day forward (to force the incremental merge) and made other backup, and I saw after merge .vbk increased in size.
I've removed duplicates, moved one day forward and made one another incremental backup.
And .vbk increased in size once again.
I've repeated it few times and here is how .vbk file size changed:
So, after few repeated cycles I have:
Folder with 1 small 14kb file as a backup target, just like at the beginning of the experiment.
And backup file for that folder (having only that 14kb file inside) increased in size from 30982 to 31667kb after few cycles of merges.
I can repeat it, so I'd be glad to help you catch this issue up, or it's an expected behaviour?