Nexus/Gamma

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The GAMMA lab has a partition of GPU nodes available in the Nexus which are only available to GAMMA lab members.

Quality of Service

The following QoS are available to this partition. Please run the show_qos command to show the limits for these QoS.

  • default
  • medium
  • high
  • huge-long

Hardware

Nodenames Type Quantity CPUs Memory GPUs
gammagpu[01-03] A5000 GPU Node 3 32 256GB 8
Total 3 96 768GB 24

Storage

Other than the default Nexus storage allocation(s) Gamma has elected to have a 20TB NVMe scratch file system on the nexusgamma00.umiacs.umd.edu host as /scratch1. To utilize this space users will need to copy data from/to this over SSH from a compute node. This file system is not available over NFS.

Example

From nexusgamma00.umiacs.umd.edu you can run the following example to submit job(s).

$ srun --pty --gres=gpu:8 --account=gamma --partition=gamma --qos=huge-long bash
$ hostname
gammagpu01.umiacs.umd.edu
$ nvidia-smi -L
GPU 0: NVIDIA RTX A5000 (UUID: GPU-cdfb2e0c-d69f-354b-02f4-15161dc7fa66)
GPU 1: NVIDIA RTX A5000 (UUID: GPU-be53e7a1-b8fd-7089-3cac-7a2fbf4ec7dd)
GPU 2: NVIDIA RTX A5000 (UUID: GPU-774efbb1-d7ec-a0bb-e992-da9d1fa6b193)
GPU 3: NVIDIA RTX A5000 (UUID: GPU-d1692181-c7de-e273-5f95-53ad381614c3)
GPU 4: NVIDIA RTX A5000 (UUID: GPU-ba51fd6c-37bf-1b95-5f68-987c18a6292a)
GPU 5: NVIDIA RTX A5000 (UUID: GPU-c1224a2a-4a3b-ff16-0308-4f36205b9859)
GPU 6: NVIDIA RTX A5000 (UUID: GPU-8d20d6cd-abf5-2630-ab88-6bba438c55fe)
GPU 7: NVIDIA RTX A5000 (UUID: GPU-93170910-5d94-6da5-8a24-f561d7da1e2d)