Computing Services

Service Details and Rates

You can access the Roar system (formerly known as ICDS-ACI) either by purchasing a Guaranteed Response Time (GReaT) allocation or by using the Open Queue. The Open Queue is a free, shared resource for all researchers, and GReaT allocations have varying prices (view rates).

Want to try out the system before you decide which access model is right for you? Request a 30-day trial of Roar using the Try-ACI button on the right sidebar.

Paid Allocation – Guaranteed Response Time

A paid Guaranteed Response Time (GReaT) allocation lets you access as many basic-, standard-, or high-memory compute cores as you need for your research, within a time frame that you choose. With a fully executed Service Level Agreement, any jobs that you submit within your allocation limit are guaranteed to start within one hour of when you submit them.

Other benefits include:

  • No wall time limit
  • Burst capability (use up to 4x your allocated compute for a limited period)
  • 5 TB of Group storage with minimum purchase

With a GReaT allocation, you can choose to purchase access to several different core types:

  • Basic Core
  • Standard Core
  • High-memory Core
  • GPUs (two types—NVidia Tesla K80s and P100s)
  • Virtual Basic Cores, part of ICDS’s High-Performance Research Cloud (HPRC)

You can also purchase additional storage for your research group.

To request a GReaT allocation, contact Derek Leydig.

Learn more about GReaT services and rates (requires Penn State login).

The Roar Open Queue

Researchers who do not have an allocation can access Roar through the Open Queue. All you need is an ICDS account. If you don’t have one, request an account here.

Jobs submitted to the Open Queue run using idle Roar computing resources. That means the jobs you submit to this queue do not count against your allocation.

Please note:

  • All Roar users have equal priority for Open Queue access
  • Open Queue jobs have no guaranteed start time
  • Jobs and interactive sessions will start and run only when sufficient idle cores are available
  • Jobs may be suspended or pre-empted if cores are needed for jobs on other queues

For each Roar account, Open Queue has these maximum limits:

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


The video above provides a brief introduction to using the Open Queue. If you have any questions about using the Open Queue or submitting jobs, please contact iask@ics.psu.edu.