Urblauna

Kesako?

Urblauna (Romanche), or Lagopède Alpin in French, is a bird known for its changing plumage which functions as a very effective camouflage. More information is available at https://www.vogelwarte.ch/fr/oiseaux/les-oiseaux-de-suisse/lagopede-alpin

It's also the name of our new sensitive data compute cluster which will replace Jura cluster.

Hardware

Compute

The cluster is composed of 18 compute nodes of which two have GPUs. All have the same 24 core processor.

Number of nodes	Memory	CPU	GPU
16	1024 GB	2 x AMD Epyc3 7443	-
2	1024 GB	2 x AMD Epyc3 7443	2 x NVIDIA A100

The GPUs are partitioned to create 4 GPUs on each machine with 20GB of memory per ~~node~~GPU

Storage

The storage is based on IBM Spectrum Scale / Lenovo DSS and provides 1PB of space in the /data filesystem.

Whilst reliable this space is not backed up and all important data should also be stored on /archive

The Curnagl /work filesystem is visible in read-only mode on Urblauna and can be used to install software on an internet connected system before using it on Curnagl.

Software

For information on the DCSR software stack see the following link:

https://wiki.unil.ch/ci/books/high-performance-computing-hpc/page/dcsr-software-stack

Slurm partitions

On Urblauna there are two partitions - "urblauna" and "interactive"

$ sinfo

PARTITION   AVAIL  TIMELIMIT  NODES  STATE NODELIST
urblauna*      up 3-00:00:00     17   idle sna[002-016],snagpu[001-002]
interactive    up    8:00:00      4   idle sna[015-016],snagpu[001-002]

There is no separate GPU partition so to use a GPU simply request

#SBATCH --gres=gpu:1

To launch an interactive session you can use Sinteractive as on Curnagl