Hardware
Currently available

Login Nodes Currently Available

(as of November 2025)

RHEL = Red Hat Enterprise Linux Operating System

All login nodes listed here are part of the Lichtenberg High Performance Cluster.

Details on what for and how to use the login nodes.

If you cannot login with an otherwise valid HLR account, follow the instructions in our FAQ.

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Lichtenberg II Phase 1

2x Xeon-AP, 96 CPU cores AVX512, 768 GB RAM:

  • lcluster13.hrz.tu-darmstadt.de, RHEL 9.4 + GPU NVIDIA Tesla T4
  • lcluster14.hrz.tu-darmstadt.de, RHEL 9.4
  • lcluster15.hrz.tu-darmstadt.de, RHEL 9.4 + GPU NVIDIA Tesla T4
  • lcluster16.hrz.tu-darmstadt.de, RHEL 9.4
  • lcluster17.hrz.tu-darmstadt.de, RHEL 9.4 + GPU NVIDIA Tesla T4
  • lcluster18.hrz.tu-darmstadt.de, RHEL 9.4
  • lcluster19.hrz.tu-darmstadt.de, RHEL 8.10 + GPU NVIDIA Tesla T4

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Lichtenberg II Phase 2

2x Xeon-AP, 104 CPU cores AVX512, 1024 GB RAM:

  • lcluster1.hrz.tu-darmstadt.de, RHEL 9.4
  • lcluster2.hrz.tu-darmstadt.de, RHEL 9.4
  • lcluster3.hrz.tu-darmstadt.de, RHEL 9.4
  • lcluster4.hrz.tu-darmstadt.de, RHEL 9.4
  • lcluster5.hrz.tu-darmstadt.de, RHEL 9.4
  • lcluster6.hrz.tu-darmstadt.de, RHEL 9.4
  • lcluster7.hrz.tu-darmstadt.de, RHEL 8.10

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The current list of available login nodes and their load can always be seen with the cat /etc/motd command. The list is updated every 5 minutes.

More information about accessing the Login Nodes.

Expansion Stage 1 of Lichtenberg II

The compute resources of the expansion Stage 1 of Lichtenberg II (avx512) are almost all available for regular use.

Expansion Stage 2 of Lichtenberg II

Due to the power short in March 2025 and the thus stinted 2000A power rail, the expansion stage 2 of Lichtenberg II (avx512) is currently unavailable (except for a few compute nodes).