Holding a user account is a precondition to access to the HLRN-IV system which you obtain as the first step of application process .

The HLRN-IV system

The HLRN-IV system consists of two independent systems named Lise (named after Lise Meitner) and Emmy (named after Emmy Noether). The systems are located at the Zuse Institute Berlin and the University of Göttingen respectively. Overall, the HLRN-IV system consists of 1270 compute nodes with 121,920 cores in total. You can learn more about the system and the differences between the sites on the HLRN-IV website.

Login

Please login to the gateway nodes using the Secure Shell ssh (protocol version 2), see the example below. The standard gateways are called

blogin.hlrn.de (Berlin)
and
glogin.hlrn.de (Göttingen).

Login authentication is possible only by SSH keys. For information and instructions please see our SSH Pubkey tutorial.

File Systems

Each complex has the following file systems available. More information about Quota, usage, and best pratices are available here.

• Home file system with 340 TiByte capacity containing $HOME directories /home/${USER}/
• Lustre parallel file system with 8.1 PiByte capacity containing
  • $WORK directories /scratch/usr/${USER}/
  • $TMPDIR directories /scratch/tmp/${USER}/
  • project data directories /scratch/projects/<projectID>/ (not yet available)
• Tape archive with 120 TiByte capacity (accessible on the login nodes, only)

• On Emmy: SSD for temporary data at $LOCAL_TMPDIR (400 GB shared among all jobs running on the node)

Filesystem quotas are currently not activated for the $HOME and $WORK directories