Hypnotoad is a small computational cluster administered by PSD Computing.  We provide access to PSD Faculty, Staff and Students upon request.  

We are targeting users who have modest computational requirements and no funding for dedicated high-performance computing equipment.   Users with serious compuational needs should contact the RCC to arrange for access to the Midway Cluster.

Hypnotoad may be small in comparison to Midway but there are some advantages to running jobs on the Toad.  We can hopefully be more responsive to any special needs that you may have on the system.  Hypnotoad is far less used than Midway so you can get un-interrupted time on nodes.  As of the time of this update we have no Wall time set so you can run jobs for as long as you require.


  1. hypnonode[001-042]: Dual quad-core Intel X5550 2.67GHz CPUs (8 cores total), 24 or 48GB RAM*, 20Gb Infiniband
  2. hypnonode-gpu[001-024]: Dual 6-core Intel X5650 2.67GHz CPUs (12 cores total), 24GB RAM, 40Gb QDR Infiniband, (2) Tesla M20xx series GPU (mix of M2050, M2070, and M2075)
  3. Lustre parallel filesystem providing approximately 113TB of space

* The base nodes are a mix of 24GB and 48GB configurations, though not in any particular grouping (which we plan to change).  Specifically, the following nodes have 48GB of RAM: hypnonode001, hypnonode[013-014], hypnonode[025-027], hypnonode[029-030], hypnonode[033-034], hypnonode[036-040]


We built hypnotoad primarially for the unfunded Students and Post-Docs who require CPU time but who have no other options available to them.  This was before the RCC changed their policy to not deduct student CPU time from their sponsor's grants.

For accounting, we would like you provide the name of your advisor or the PI who you're otherwise primarially working with.   We don't bill for time on Hypnotoad.  This is just information to keep you all straight.

You can request an account here.


Hypnotoad jobs are managed by the SLURM queuing software.  This is the same software package that the RCC uses on the Midway cluster.  Aside from being a compute resource, Hypnotoad is also a good place to familiarize yourself using queueing software before you move on to larger systems.

You can find information about creating and submitting compute jobs on hypnotoad at our Using Hypnotoad page.   The RCC has also posted some examples of SLURM job scripts on their website.