[khmer] Not enough disk space?

[Cedar McKay]

I feel like I must be doing something silly,  but I can’t figure it out.

My working directory is a 600GB ssd raid0 mounted at /mnt, but khmer is complaining that there isn’t enough disk space, reporting that only 3.5 GB is available, which happens to be exactly what is available on my system partition.

Terminal output below, anyone see something silly I’m doing? Thanks in advance for your help!

 

root at node001:/mnt# df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/xvda1            7.8G  4.1G  3.3G  56% /
[snip]
/dev/md0              591G  245G  316G  44% /mnt

root at node001:/mnt# normalize-by-median.py -N 4 -x 28e9 -C 20 -k 25 -s ./ETNP_free.kh ./ETNP_free.fasta.gz 

|| This is the script 'normalize-by-median.py' in khmer.
|| You are running khmer version 1.4.1
|| You are also using screed version 0.8
||
|| If you use this script in a publication, please cite EACH of the following:
||
||   * MR Crusoe et al., 2014. http://dx.doi.org/10.6084/m9.figshare.979190
||   * CT Brown et al., arXiv:1203.4802 [q-bio.GN]
||
|| Please see http://khmer.readthedocs.org/en/latest/citations.html for details.


PARAMETERS:
 - kmer size =    25 		(-k)
 - n tables =     4 		(-N)
 - min tablesize = 2.8e+10 	(-x)

Estimated memory usage is 1.1e+11 bytes (n_tables x min_tablesize)
--------
ERROR: Not enough free space on disk for saved table files;       Need at least 108.53429248 GB more.
       Table size: 112.0 GB
       Free space: 3.5 GB