Clariden is a vcluster (versatile software-defined cluster) that's part of the Alps system.

A short summary of the hardware available in the nodes:

Partition	NNodes	GPUs per node	GPU	GPU memory
nvgpu	18	4	Nvidia A100	80GB
amdgpu	12	8	AMD Mi200	64GB
clariden	200	0	-	-

Access and Accounting

Clariden can be reached via ssh from the front end Ela ( `ssh <username>@ela.cscs.ch`). The access to CSCS services and systems requires users to authenticate using multi-Factor Authentication (MFA). Please, find more information here.
Account and Resources Management Tool
Usage policies

Running Jobs

Clariden uses the Slurm workload manager to manage the job scheduling.

Some typical/helpful slurm commands are

sbatch	submit a batch script
squeue	check the status of jobs on the system
scancel	delete one of your jobs from the queue
srun	launch commands in an existing allocation
srun --interactive --jobid <jobid> --pty bash	start interactive session on an allocated node

Example of Slurm job script

#!/bin/bash -l

#SBATCH --job-name=<jobname>
#SBATCH --time=00:15:00
#SBATCH --nodes=1
#SBATCH --ntasks-per-core=1
#SBATCH --ntasks-per-node=4
#SBATCH --cpus-per-task=16
#SBATCH --partition=nvdgpu
#SBATCH --account=<project>

srun executable

Currently there's no accounting of the compute time, but it's expected to be setup.
Please note that the Slurm scheduling system is a shared resource that can handle a limited amount of batch jobs and interactive commands simultaneously. Therefore users are not supposed to submit arbitrary amounts of Slurm jobs and commands at the same time.

Files system

Storage in Clariden