In case of Deletes on items – tool currently only captures the snapshot of 'active items' and doesn't consider any items getting deleted. Hence when it transfers it not only transfers current active items but also any deleted items which is unnecessary. To fix this we require some changes in EP-Engine side to provide stats on deleted items so that tool can smartly ignore those. Considering the timeframe for release this won't make it for 2.1.0 but we will have documentation explaining this to users.
There are 2 issues here. One has been addressed in 2.1 (considering DGM in backup % calculation). But the other part (ignoring tombstones in backup) is not yet addressed. I see Anil's comment that it will not make to 2.1. But should the ticket still be kept open to avoid loosing visibility ?
Also while ignoring tombstones in backup may be involved; how involved is just considering the # of tombstones in the % calculation ? Atleast we will not confuse the customers if we consider that in the denominator and completion displayed is never more than 100% (or max marginially above 100%).