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HPRC Overview

HPRC is the hybrid-cloud portion of Roar, utilizing virtual cores at a lower cost. HPRC jobs are submitted from Roar head nodes, with the host name

…and can be logged into using ssh.

Roar uses Moab and Torque for the scheduler and resource manager. Jobs can be either run in batch or interactive modes. Both are submitted using the qsub command.

Users will be placed on a head node, which is not intended for heavy processing. The head node should only be used to submit jobs.

Typically, a job submission script including the resource requests and the commands is submitted. A job scheduler will wait until dedicated resources are available for this job. Jobs are typically submitted with the qsub command:

qsub subScript.pbs

Requesting Resources

Whether you are submitting batch or interactive jobs, you are required to provide a list of requested resources to the scheduler. These are given either in the submission script or on the command line. If these are given in a submission script, they must come before any non-PBS command. Current limits on HPRC resource requests:

  • Pmem < 8GB
  • Mem < 160GB
  • Core/node <= 20
  • Node = 1


Users can connect to HPRC from ACI-b head nodes, with the host name

…using ssh. Users connecting with ssh are encouraged to use the secure x-window forwarding flag (-Y) if x-windows will be used during the session. Note that the screen may not show * symbols for each keystroke when your password is being entered. (In this example, the username is “abc123”.)

ssh -Y