cacti misreports koji disk space

[Mike McLean]

For a while I would look at the /mnt/koji space graph in Cacti and say 
to myself "boy, garbage collection sure has managed to slow the growth 
in space usage." The graph was really leveling off.

https://admin.fedoraproject.org/cacti/graph.php?action=view&rra_id=all&local_graph_id=280

But then I realized: it's too level. If you get the csv data from Cacti, 
the numbers for the last few months are identical. The data shows 
2.1990232545e+12 used, which is suspiciously close to exactly 2T (and 
wrong, df reports 2.7T). The free space is stuck at the same number. 
Oddly the total space is reported as 4.3980465091e+12, which is almost 
exactly 4T (and also way wrong, df reports 9.9T).

Anyway, given the numbers it looks like some sort of maxint issue. Does 
anyone know if there is a fix?