8 GB nodes available on NIH Biowulf Cluster (Biowulf)

A small number of dual-processor (2.8 GHz) Opteron nodes
configured with 8 GBytes of memory are now available on
the Biowulf cluster.  These nodes now have the highest
memory/processor ratio (4GB/1p) on the cluster.

To specify 8 GB nodes, use the "m8192" property, e.g.:

qsub -l nodes=1:m8192 myjob.bat

These nodes should be used for jobs (Gaussian, etc) which
result in swapping on 4 GB nodes, and should drastically
improve performance.  Please specify these nodes _only_
for jobs requiring >4 GB memory.

There are currently 32 8 GB nodes, and we expect to raise the
number available to 48.  You can determine the number available
with the 'freen' (free nodes) command:

$ freen
         m1024   m2048   m4096   m8192   Total
-----------------  Reserved   -----------------
o2800   /       35/89   /       31/32   66/121


Please send questions and comments to staff@biowulf.nih.gov