BwUniCluster2.0/Maintenance/2023-03

The following changes were introduced during the maintenance interval between on 20.03.2023 (Monday) 08:30 and 24.03.2023 (Friday) 15:00.

The host key of the system has not changed. You should not receive any warnings by your SSH client(s), but if there should be a warning or if you want to check that you are connecting to the correct system, you can verify the key hashes using the following list:

Algorithm	Hash (SHA256)	Hash (MD5)
RSA	p6Ion2YKZr5cnzf6L6DS1xGnIwnC1BhLbOEmDdp7FA0	59:2a:67:44:4a:d7:89:6c:c0:0d:74:ba:3c:c4:63:6d
ECDSA	k8l1JnfLf1y1Qi55IQmo11+/NZx06Rbze7akT5R7tE8	85:d4:d9:97:e0:f0:43:30:6e:66:8e:d0:b6:9b:85:d1
ED25519	yEe5nJ5hZZ1YbgieWr+phqRZKYbrV7zRe8OR3X03cn0	42:d2:0d:ab:87:48:fc:1d:5d:b3:7c:bf:22:c3:5f:b7

Hardware

• All firmware versions on all components were upgraded.

Operating system

• The operating system was upgraded from RHEL 8.4 EUS to RHEL 8.6 EUS. We recommend to re-compile all applications after the upgrade.

• The Mellanox OFED InfiniBand Stack was updated.

Software Modules

• The Lmod module system was upgraded.

• Old openmpi 4.0 modules were removed. Please use openmpi 4.1.

Batch system

• The Slurm version was upgraded to version 23.02.0.

• The Slurm partitions have changed.

Storage

• Lustre client, BeeGFS client and Spectrum Scale client were updated.

Graphics stack

• The NVIDIA driver was upgraded.

Containers

• Enroot was upgraded.

• Singularity was replaced with its successor Apptainer. (the command 'singularity' still works)

JupyterHub

• Jupyterhub was upgraded to version 3.1.1

• python3.9 is now used as the default