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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 replaced the Jura cluster.

Information on how to connect to Urblauna can be found here.

The differences between Jura and Urblauna are described here

Hardware

Compute

The cluster is composed of:

  • 18 compute nodes with 2 x AMD Epyc3 7443 and 1024 of Memory
  • 4 Nvidia A100 (40 GB) partitioned to create 4 GPUs on each machine with 20GB of memory per 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

/data

The /data filesystem is structured in the same way as on Curnagl

/data/FAC/FACULTY/INSTITUTE/PI/PROJECT

This space is on reliable storage but there are no backups or snapshots.

If you wish to increase the limit then just ask us. With 1PB available all resonable requests will be accepted.

/scratch

It is considered as temporary space and there is no fee associated.

There are no quotas but in case of the utilisation being greater that 90% then files older than 2 weeks will be removed automatically.

/users

The /users home directory filesystem.

/work

The Curnagl /work filesystem is visible in read-only from inside Urblauna. This is very useful for being able to install software on an Internet connected system.

/reference

This is intended to host widely used datasets

The /db set of biological databases can be found at /reference/bio_db/

/archive

This is an HSM (Hierarchical Storage Management system) meaning that any files written are copied on tape in two copies, after some time the file content is erased from disk and a pointer to the file on tape remains. If you open a file which content is not on disk any more the tape cardridge has to be loaded in a drive, spooled to the right place and then transferred to disk.

It is only for cold data. If you have to retrieve more than 1000 files please send us a ticket at helpdesk@unil.ch with subject "DCSR Urblauna archive retrieve" and the directory path.

It has the same roganization as /data:

/archive/FAC/FACULTY/INSTITUTE/PI/PROJECT

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

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