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...

The migration to the new OS is organised in three consecutive phases. It is expected to be complete by the end of July September.

  1. The first phase starts with 2 login nodes and 112 compute nodes already migrated to Rocky Linux 9 for testing. The other nodes remain available under CentOS 7 for continued production.

  2. After the test phase, a major fraction of nodes will be switched to Rocky Linux 9 to allow for general job production under the new OS.

  3. During the last phase, only a few nodes still remain under CentOS 7. At the very end, they will be migrated to Rocky Linux 9, too.

During the migration phase the use of Rocky Linux 9 "clx" compute nodes will be was free of charge.

Current migration state

nodes

CentOS 7

Rocky Linux 9

login

blogin[1-2]

blogin[3-8]

compute (384 GB RAM)

256

688

compute (768 GB RAM)

32

0

compute (1536 GB RAM)

2

0

Latest news

date

subject

2024-09-30

migration of remaining nodes from CentOS 7 to Rocky Linux 9

2024-09-16

generic login name “blogin” resolves to blogin[3-6]

2024-08-14

migration of blogin[3-6]

2024-07-30

migration of another 576 standard compute nodes to Rocky Linux 9

2024-07-03

official start of the migration phase with 2 login and 112 compute nodes running Rocky Linux 9

...

CentOS 7

Rocky Linux 9

old partition name

new partition name

current job limits

● standard96

● cpu-clx

512 nodes, 12h wall time

● standard96:test

● cpu-clx:test

32 nodes, 1 h wall time

● standard96:ssd

● cpu-clx:ssd

● large96

● cpu-clx:large

● large96:test

● large96:shared

● huge96

● cpu-clx:huge

( ● available ● closed/not available yet )

...

  • node hardware and node names

  • communication network (Intel Omnipath)

  • file systems (HOME, WORK, PERM) and disk quotas

  • environment modules system (still based on Tcl, a.k.a. “Tmod”)

  • access credentials (user IDs, SSH keys) and project IDs

  • charge rates and CPU time accounting (early migrators' jobs are were free of charge)

  • Lise’s Nvidia-A100 and Intel-PVC partitions

...

Erweitern
titleI have loaded the "intel/2024.2" environment module, but still neither the icc nor the icpc compiler is found. Why that?

Starting with the 2022.2 release of Intel’s oneapi toolkits, the icc and icpc “classic” compilers (C/C++) have been marked as “deprecated”, see here. Corresponding user warnings

icc: remark #10441: The Intel(R) C++ Compiler Classic (ICC) is deprecated and will be removed from product release in the second half of 2023. The Intel(R) oneAPI DPC++/C++ Compiler (ICX) is the recommended compiler moving forward. Please transition to use this compiler. Use '-diag-disable=10441' to disable this message.

were generated when using icc or icpc. The 2024.x releases of the Intel oneapi toolkits do not contain icc and icpc any longer. Users need to switch to Intel’s “next generation” icx and icpx compilers, respectively. They accept almost all of the “classic compiler” switches. More information is available from Intel’s porting guide.

Erweitern
titleI cannot establish an ssh connection to the login nodes running Rocky Linux 9. Do I need to generate a new ssh key?

No, your ssh key remains valid. We have seen this kind of problem for Windows users with an outdated version of PuTTY. Updating to a more recent PuTTY (≥ 0.81) solved this problem. The same holds for WinSCP which needs to be up-to-date, too.