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Free Roar Access Versus a Paid Allocation

All Penn State students, faculty and staff are able to run on the Roar “open queue” on ACI-b for no charge. The current limits per user on the open queue are:

  • 100 jobs pending
  • 100 cores executing jobs at any given time
  • 48-hour job wall-times
  • 24-hour interactive session durations

Jobs requiring more time or processors than this are required to run on an allocation.

Jobs running on the open allocation are placed on available compute nodes. These are available as they are not being used by the group who has an allocation reservation on that node. If that group does require these resources, the running open queue jobs are pre-empted. Once the allocation job has completed, your job will continue, if the code running allows for this to occur.

Roar access via Open OnDemand is open to any and all users, regardless of allocation.

The users who have access to an allocation are placed in an allocation group. Users can see all of the groups they are in by using the id command.

To gain access to an allocation or a group storage, have the PI send an email to the i-ASK Center ( stating the user IDs (ex. abc123) and the allocation(s) and group storage(s) you wish to add them to. This explicit permission must be granted before users are allowed access.