NEMO/Login

Disclaimer

The bwForCluster ENM (NEMO) is NOT available yet! But we offer a test cluster called pre-bwForCluster ENM (NEMO) with old bwGRiD Hardware. We run the Cluster with CentOS 7.1 which is binary compatible to RHEL 7 and new configuration and concept.

Login

After registration (registration procedure at bwForCluster User Access, the bwForCluster ENM (NEMO) can be accessed via ssh.

From linux machines, you can log in using

ssh <UserID>@login.bwfor.uni-freiburg.de

To run graphical applications, you can use the -X or -Y flag to openssh:

ssh -Y <UserID>@login.bwfor.uni-freiburg.de

For better performance on slow connections you should use e.g. VNC.

About UserID / Username

<UserID> of the ssh command is a placeholder for your username at your home organization and a prefix denoting your organization. Prefixes and resulting user names are as follows:

Site	Prefix	Username
Freiburg	fr	fr_username
Heidelberg	hd	hd_username
Hohenheim	ho	ho_username
Karlsruhe	ka	ka_username
Konstanz	kn	kn_username
Mannheim	ma	ma_username
Stuttgart	st	st_username
Tübingen	tu	tu_username
Ulm	ul	ul_username

Allowed activities on login nodes

The login nodes are the access point to the compute system and its $HOME directory. The login nodes are shared with all the users of the cluster. Therefore, your activities on the login nodes are limited to primarily set up your batch jobs. Your activities may also be:

• compilation of your program code and
• short pre- and postprocessing of your batch jobs.

To guarantee usability for all the users of the bwForCluster you must not run your compute jobs on the login nodes. Compute jobs must be submitted as Batch Jobs. Any compute job running on the login nodes will be terminated without any notice.

Further reading

• Scientific software is made accessible using the Environment Modules system

• Compute jobs must be submitted as Batch Jobs

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