WSC Cluster       


WSC Cluster - overview

Welcome to the WSC cluster


This is an experimental cluster, continuously undergoing system software and hardware changes.
The contents of this page may not fully reflect the actual installation at a given time.


The WSC cluster consists of IBM Witherspoon nodes (2 socket, 22 core Power9 CPUs + 6 Volta GPUs). 


At this time, the cluster consists of 57 compute nodes, each with with dual socket 22 core CPU and 6 GPUs, plus seven additional nodes dedicated to management functions. Occasionally, a few compute nodes are assigned to specific experiments, thus the maximum number of compute nodes available for regular use at a given time might be less than 57. Management nodes include login and launch nodes; these nodes have dual socket 20 core CPU and 4 GPUs.

Note: This cluster is in the IBM Yellow zone, so it cannot access any of the internal IBM Blue zone addresses.

The cluster is intended to be used for the following purposes:

  • Client collaboration.
  • Advanced research for government-funded projects.
  • Advanced research on Converged Cognitive Systems.
  • Advanced research on Deep Learning.

Confidential and Proprietary data

  • Data stored in WSC may be "IBM Proprietary" data, meaning data used as part IBM proprietary projects undergoing development.
  • There should not be any "IBM Confidential" data stored in WSC; that is, data that requires authorization for its use
  • There should not be any Personal Sensitive Information (PSI) stored in WSC.
  • There should not be any Export Controlled data stored in WSC.

If in doubt regarding the classification of some data, do not hesitate to ask for clarification.

Requesting an Account and Loging In

IBM employees

Submit the request form at the link below. Include your GSA id and the output from the "id" command, so that admins have the GSA user and group numeric id's.

External Parties

Non-IBM (external) parties should request access through an IBM collaborator, or contact Julie Sherlock (

Location of Login Nodes and

Reporting problems

IBM employees

Problems with the cluster need to be submitted through an internal GitHub issues system (

External Parties

Communicate the problem to IBM collaborators so they can file an issue through the internal GitHub issues system.

Documentation at ORNL

ORNL has extensive documentation on Summit; some of that documentation is also applicable to WSC: