DN Nodes

dx360.jpg

We have 150 IBM System X iDataPlex dx360 M3 Server nodes, these nodes are not restricted to any user group and as a result perform a diverse range of workloads. Although these are busy nodes, the wait times are usually short due to the large overall number of cores provided by these nodes.

DN IBM System X iDataPlex dx360 M3
Number 150
Processor 2 x 6 Core Intel Xeon E5645 (Westmere)
Cores/Node 12
RAM 24GB
TMP Size 173GB minimum
Interconnect 1Gb Ethernet

Notes

  • Bear in mind the RAM limit on the dn nodes. Requesting less than 24GB total for a job will ensure the job can run on a dn node (obviously please ensure these are correct requirements, since failed jobs are a big waste of resources). Small single-core jobs of around 1GB RAM get scheduled very quickly on these nodes, hence array jobs of small tasks run quickly. Requesting more than a third of a node's resources will require a longer wait for similarly sized resources to become free.
  • Hyperthreading is not enabled on the Intel CPUs. Jobs are therefore allocated real cores.