Hardware Changes on the NIH Biowulf Cluster (Biowulf)

Some significant changes to the Biowulf cluster will
occur in the next few weeks:

-- All 32-bit nodes will be retired on Tuesday May 25, 
  2010. The p2800 nodes have 32-bit Xeon processors 
  and are the oldest nodes in the cluster at over 
  6-years old.

  After the p2800 nodes are retired, all compute nodes
  in the cluster will have 64-bit architectures making 
  the "x86-64" PBS property unnecessary.  

  Note that all existing 32-bit code will continue to
  run on the 64-bit nodes.

-- Myrinet will also be retired on Tuesday May 25, 2010.
  Jobs requesting the "myr2k" property will no longer 
  be accepted by the batch system.  

  Applications requiring high-bandwidth, low-latency 
  networks should use Infiniband instead of Myrinet.

-- June 2010.  336 nodes (2688 cores) will be added to the 
  cluster.  The new compute nodes have two quad-core Intel
  Nehalem processors running at 2.67 Gz and 24 GB memory.
  Details on how to submit jobs to these nodes will be
  announced when the nodes are ready to come online.