[torqueusers] Torque udp communication

Ken Nielson knielson at adaptivecomputing.com
Wed Aug 25 15:02:33 MDT 2010

On 08/25/2010 02:58 PM, Sarah Williams wrote:
> Hi Torque users&  experts,
> I'm having some issues getting a subset of our worker nodes to talk to
> the pbs server. Using tcpdump we've discovered that the hello message is
> getting dropped because it is too long. The server has MTU 9000, and the
> client has MTU 1500. ( Unfortunately the network card on these worker
> nodes does not support MTU 9000. ) Normally in this situation packets
> would be split, but for some reason these packets are coming across with
> the DF/IP_DONTFRAG flag set.
> Does anyone know how to disable use of the DF/IP_DONTFRAG, or
> alternately how to set up Torque not to use UDP at all?
> --Sarah Williams
> _______________________________________________
> torqueusers mailing list
> torqueusers at supercluster.org
> http://www.supercluster.org/mailman/listinfo/torqueusers
UDP cannot currently be disabled for TORQUE. However, the hello packet 
itself is only a few bytes. The server will return the addresses of all 
the nodes in the cluster. How many nodes are in your cluster?

Ken Nielson
Adaptive Computing

More information about the torqueusers mailing list