Supported vClusters¶

This page is hosting information about C2SM supported vClusters (not all CSCS vClusters).

Access¶

Connection to vClusters happens as for any other CSCS machine, e.g. ssh santis.cscs.ch with a ProxyJump on ela.cscs.ch. A section in the ~/.ssh/config could look as follows:

~/.ssh.config

Host ela
  Hostname ela.cscs.ch
  User cscsusername
  IdentityFile ~/.ssh/cscs-key

Host santis* daint* 
  Hostname %h.alps.cscs.ch
  User cscsusername
  IdentityFile ~/.ssh/cscs-key
  ProxyJump ela

Host balfrin* 
  Hostname %h.cscs.ch
  User cscsusername
  IdentityFile ~/.ssh/cscs-key
  ProxyJump ela

This allows standard connections like ssh santis, but you can also specify a login node if needed, e.g., ssh santis-ln002. Replace cscsusername with your actual username.

Santis¶

The vCluster santis is dedicated to Climate and Weather applications. It includes the following:

EXCLAIM : Project for ICON-based km-scale climate simulations
Projects by C2SM community members
User lab projects in climate and weather domains

Uenvs¶

To find and use already existing uenvs from previous todi, you need to prepend the CLUSTER_NAME environment variable to any uenv command.

CLUSTER_NAME=todi uenv image find

uenv	activity
`icon-wcp/v1:rc4`	build and run ICON
`netcdf-tools/2024:v1-rc1`	pre- and post-processing tools

SLURM Partitions¶

SLURM partition	Default wall time	Max. wall time	Limitations
normal	01:00:00	24:00:00	-
debug	00:30:00	00:30:00	Single node
xfer	06:00:00	24:00:00	Single node

Daint¶

Daint (Alps) is the vCluster dedicated to the User Lab. It is accessible at daint.alps.cscs.ch.

The Climate and Weather Platform (CWP) has the dedicated vCluster santis (see above). User Lab projects in climate and weather domain should be on santis.

Uenvs¶

As on santis, you can access the uenvs from todi:

CLUSTER_NAME=todi uenv image find

uenv	activity
`icon-wcp/v1:rc4`	build and run ICON
`netcdf-tools/2024:v1-rc1`	pre- and post-processing tools

Storage¶

The migration of the previous storage from old Piz Daint has been finished in January 2025.

AlpsBalfrin

/capstor/store/cscs/c2sm

/capstor/store/cscs/c2sm