Difference between revisions of "Nexus/Gamma"

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(Created page with "The [https://gamma.umd.edu/ GAMMA] lab has a partition of GPU nodes available in the Nexus. The following QoS are also available to this partition. Please run the <code>show...")
 
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The [https://gamma.umd.edu/ GAMMA] lab has a partition of GPU nodes available in the Nexus.
+
The [https://gamma.umd.edu/ GAMMA] lab has a partition of GPU nodes available in the Nexus which are only available to GAMMA lab members.
  
The following QoS are also available to this partition. Please run the <code>show_qos</code> command to show the limits for these QoS.
+
=Access=
 +
You can always find out what hosts you have access to submit via the [[Nexus#Access]] page.  The GAMMA lab in particular has a special submission host that has additional local storage available.
 +
* <code>nexusgamma00.umiacs.umd.edu</code>
  
 +
=Quality of Service=
 +
The following QoS are available to this partition.  Please run the <code>show_qos</code> command on a submission host to show the limits for these QoS.
 
* default
 
* default
 
* medium
 
* medium
 
* high
 
* high
 
* huge-long
 
* huge-long
 +
 +
=Hardware=
 +
{| class="wikitable sortable"
 +
! Nodenames
 +
! Type
 +
! Quantity
 +
! CPUs
 +
! Memory
 +
! GPUs
 +
|-
 +
|gammagpu[01-03]
 +
|A5000 GPU Node
 +
|3
 +
|32
 +
|256GB
 +
|8
 +
|- class="sortbottom"
 +
|
 +
!Total
 +
|3
 +
|96
 +
|768GB
 +
|24
 +
|}
 +
 +
=Storage=
 +
Other than the default [[Nexus#Storage|Nexus]] storage allocation(s), Gamma has invested in a 20TB NVMe scratch file system on <code>nexusgamma00.umiacs.umd.edu</code> that is available as <code>/scratch1</code>.  To utilize this space, you will need to copy data from/to this over SSH from a compute node.  To make this easier, you may want to setup [[SSH]] keys that will allow you to copy data without prompting for passwords. 
 +
 +
This file system is not available over [[NFS]] and there are no [[Backups | backups]] or [[Snapshots | snapshots]] available for this file system.  Please refer to our [[LocalDataStorage#UNIX_Local_Storage|UNIX Local Storage]] page for more information.
 +
 +
=Example=
 +
From <code>nexusgamma00.umiacs.umd.edu</code> you can run the following example to submit an interactive job.  Please note that you need to specify the <code>--account</code>, <code>--partition</code> and <code>--qos</code>.  Please refer to our [[SLURM]] documentation about about how to further customize your submissions including making a batch submission.
 +
 +
<pre>
 +
$ 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)
 +
</pre>

Revision as of 18:53, 12 July 2022

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

Access

You can always find out what hosts you have access to submit via the Nexus#Access page. The GAMMA lab in particular has a special submission host that has additional local storage available.

  • nexusgamma00.umiacs.umd.edu

Quality of Service

The following QoS are available to this partition. Please run the show_qos command on a submission host 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 invested in a 20TB NVMe scratch file system on nexusgamma00.umiacs.umd.edu that is available as /scratch1. To utilize this space, you will need to copy data from/to this over SSH from a compute node. To make this easier, you may want to setup SSH keys that will allow you to copy data without prompting for passwords.

This file system is not available over NFS and there are no backups or snapshots available for this file system. Please refer to our UNIX Local Storage page for more information.

Example

From nexusgamma00.umiacs.umd.edu you can run the following example to submit an interactive job. Please note that you need to specify the --account, --partition and --qos. Please refer to our SLURM documentation about about how to further customize your submissions including making a batch submission.

$ 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)