Quick update on that,
our system is a 3 node setup. as you can see on the config above ns request have allocated file space of 120GB, it turned out that node2 run the file space competently full while node 1/3 are fine (used 7.3GB only). I just wonder what have cause the problem. I check all 3 logs there is nothing about segfault or warning. What we except is there went something wrong with the defragmentation. Because (see screenshot [1]) it looks like it wasn’t properly cleanup. The hardware for all 3 machines is identical.
[1] goo.gl/8PST8y goo.gl/F6jrFc
thx in advance.
//edit
It looks very similar to this thread here;