The FLARECAST node is the computing serveur named cluster-r730-1.u-psud.fr which is part of the IAS (PSUD) cluster. This cluster is managed by the SLURM system. SLURM can be used as a queuing system, but at PSUD it is only used as a resource allocation system at the moment (as of 2016-04-22).
Connection
Please use your PSUD login/password to connect to cluster-head.ias.u-psud.fr
Please note that a connection from out of PSUD requires using the ias-ssh.ias.u-psud.fr gateway.
Information about current resource usage
- sinfo: information about SLURM queues
- squeue: list of jobs in queues
The FLARECAST queue (or "partition" in SLURM) is called "flarecast", and corresponds to the FLARECAST node of the cluster (cluster-r730-1). Other queues (and nodes) can be used if requirements exceed the FLARECAST node availability, but these are shared with other projects, so please be considerate in your usage of other nodes.
Launching an interactive session within the SLURM system
The salloc command allocates resources within a queue and opens a shell from which commands using these resources can be launched with the srun command. This is mainly used for testing. Exiting the shell will cancel the resource allocation. If you want to keep the resource allocation
ebuchlin@cluster-head:~$ salloc -p flarecast -n 2
salloc: Granted job allocation 2765
ebuchlin@cluster-head:~$ srun hostname
cluster-r730-1
cluster-r730-1
ebuchlin@cluster-head:~$ exit
salloc: Relinquishing job allocation 2765
salloc: Job allocation 2765 has been revoked.
ebuchlin@cluster-head:~$