I'm experimenting with XCP-ng but got the following problem.
There is not enough room for snapshots because for some reasons I don't know another orphaned snapshot is created.
This get's deleted after a while and then immediatly recreated again. At the moment that this is deleted the free space on the repository is also adjusted. But for a verry brief moment. The size of the green bar decreases and increases again.
I don't have any backup scheduled at this moment that I can see.