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Preface

CentOS 7 has reached its end of life. For this reason the operating system (OS) of Lise's CPU partition will be updated to Rocky Linux 9. This affects all login and compute nodes equipped with Intel Xeon Cascade Lake processors ("clx" for short). Lise's GPU partitions ("a100" and "pvc") are not affected.

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The OS migration phase starts with two 2 login nodes and 112 compute nodes already running Rocky Linux 9 for testing, while the other nodes remain available under CentOS 7. After an initial testing period, a major fraction of nodes will be switched to Rocky Linux 9 to allow for general job production under the new OS. In the last step, the few nodes still under CentOS 7 will be converted to Rocky Linux 9, too. During the migration phase the use of Rocky Linux 9 "clx" compute nodes will be free of charge.

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Latest news

date

subject

2024-07-0203

announcement: start of migration phase with 2 login and 96 112 compute nodes running Rocky Linux 9test jobs (queue limits ?)

What has changedWhat has changed

SLURM partitions

CentOS 7

Rocky Linux 9

name

name

current job limits

standard96

cpu-clx

standard96:test

cpu-clx:test

16 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 )

Software and environment modules

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CentOS 7

Rocky Linux 9

TMPDIR=/scratch/tmp/$USER

(undefined, local /tmp is used)

SLURM_MPI_TYPE=pmi2

SLURM_MPI_TYPE=pmix

(undefined)

I_MPI_PMI_LIBRARY=<path-to>/libpmix.so

(undefined, default is psm2)

FI_PROVIDER=opx

(undefined)

NHRZIB_ARCH=clx

NHRZIB_OS=el9

NHRZIB_TARGET=clx.el9

SLURM partitions

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CentOS 7

...

Rocky Linux 9

...

standard96

...

cpu-clx

...

standard96:test

...

cpu-clx:test

...

standard96:ssd

...

cpu-clx:ssd

...

large96

...

cpu-clx:large

...

large96:test

...

large96:shared

...

huge96

...

cpu-clx:huge

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What remains unchanged

  • 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 free of charge)

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

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