Login Nodes
On this page, you will find information about the available login nodes for the CLAIX-2025 cluster.
Specifically, this includes:
- An overview of the existing login nodes
- Usage limitations enforced on the login nodes for each user
- GPU configuration of the GPU login node
- Active SSH ciphers
- Fingerprints
Overview Available Login Nodes
| Hostname | Hardware | Operating System | Connection Options | Recommended Usage | ||
|---|---|---|---|---|---|---|
| SSH | FastX Client | FastX Webbrowser | ||||
login25-1.hpc.itc.rwth-aachen.de | 2× AMD EPYC 9654 (Genoa) | Rocky 9 | Details | Details | — | General Use |
login25-2.hpc.itc.rwth-aachen.de | ||||||
login25-3.hpc.itc.rwth-aachen.de | ||||||
login25-x-1.hpc.itc.rwth-aachen.de | Open (wird in neuem Tab geöffnet) | |||||
login25-g-1.hpc.itc.rwth-aachen.de | 2× AMD EPYC 9535 (Turin) 4× NVIDIA H100 GPUs | — | GPU-enabled Development | |||
Usage Limits on Login Nodes
The login-nodes are not intended for heavy workloads. The following usage limitations apply:
- CPU Cores: Each user is permitted to use up to 4 CPU cores.
- Workload: Processes that use significant CPU resources for more than 20 minutes may get cancelled without prior warning.
- Memory: Each user's processes can collectively utilize up to 25% of the total available memory on a node. If this memory limit is reached, the process consuming the most memory will be terminated immediately without prior warning.
- GPU Usage: GPU access is restricted to 30 minutes per process. Processes exceeding this time limit will be automatically cancelled.
- Scheduled Reboots: For maintenance and optimal performance, all login nodes are rebooted weekly on Monday mornings at 6:00 AM.
GPU Configuration on the GPU Login Node
The 4 GPUs on the login25-g-1 node are configured as follows:
| GPU-Number | nvidia-smi Information | Mode of Operation |
|---|---|---|
| 0 | Compute M.: Default MIG M.: Disabled | Shared among users. |
| 1 | Compute M.: Default MIG M.: Disabled | Shared among users. |
| 2 | Compute M.: E. Process MIG M.: Enabled | GPU is configured with 7 MIG-instances. Instances are exclusive to one process each. |
| 3 | Compute M.: E. Process MIG M.: Disabled | Exclusive to one process. |
Please note that the numbering of the GPUs is not consecutive and may be against expectation. Please use the UUIDs instead of integer indices when setting CUDA_VISIBLE_DEVICE (wird in neuem Tab geöffnet) environment variable. You can figure out the UUIDs by nvidia-smi -L command.
Active SSH Ciphers
aes256-gcm@openssh.com
aes128-gcm@openssh.com
aes256-ctr
aes192-ctr
aes128-ctrFingerprints
256 SHA256:L4hMHmutY2OnBichov/7JndWz82oDCx6v5lEjQuXUYM login25-1.hpc.itc.rwth-aachen.de (ED25519)256 SHA256:pPOnpEf3FsdnoJCyu8MQRoLzCKL1XG/PvfPSILUv6IY login25-1.hpc.itc.rwth-aachen.de (ECDSA)3072 SHA256:zpN+nKxZnn9kCDKxG627EdsPY1JBlpPeHpP4UbqEFHM login25-1.hpc.itc.rwth-aachen.de (RSA)256 SHA256:6BB7XL/2wAYbYb/kh0wFk+PmVNS/s8rwW+fU9USv0CI login25-2.hpc.itc.rwth-aachen.de (ECDSA)256 SHA256:K2i+b4D2N3HWRj9d705nRT/GMzDMSZCQuQnhD7IeDQg login25-2.hpc.itc.rwth-aachen.de (ED25519)3072 SHA256:EwH7tQrgY/7O8eH/IxYcvMnCgPkt8M5LgSc4yWptBPc login25-2.hpc.itc.rwth-aachen.de (RSA)256 SHA256:BBHxb5h/qHdR//9lPIURYFsm9A2QMOnjM/vBQF1S1Oc login25-3.hpc.itc.rwth-aachen.de (ECDSA)256 SHA256:vghpQLczoFahjrO/cafsO6KI+/rIj7mIMyUbqM+xdFc login25-3.hpc.itc.rwth-aachen.de (ED25519)3072 SHA256:MLNt/hlHB2RFAMG4KTv5jfSZwNAx7BLPB7ixXPqx6S8 login25-3.hpc.itc.rwth-aachen.de (RSA)256 SHA256:gb8bJtbFCzaN9yC3diKHK52l2RkYqo2RdRlw6uxxO5E login25-g-1.hpc.itc.rwth-aachen.de (ECDSA)256 SHA256:mMYKbru2EM8vZfcqC2GQg6m3wJKIkYtYeHGpT2bWL0o login25-g-1.hpc.itc.rwth-aachen.de (ED25519)3072 SHA256:58/4JE62rgWZijxQEM41GmHZgq42CqqNerlQnthvp9s login25-g-1.hpc.itc.rwth-aachen.de (RSA)256 SHA256:DCxQwIytCMDzhoYSHJuLA0spl25XiAyZbBWrmCfcjHg login25-x-1.hpc.itc.rwth-aachen.de (ED25519)256 SHA256:igQO/liuCFfFl4VKXlehiLGR0Yf0hX3TzfBmNF205qM login25-x-1.hpc.itc.rwth-aachen.de (ECDSA)3072 SHA256:3nF7aJgMF9+iFooYAfMY+jUAn+4J7wAfaqRTTaHvNNw login25-x-1.hpc.itc.rwth-aachen.de (RSA)
