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Great Lakes Summer 2021 Maintenance

August 9, 2021 @ 6:00 am - August 11, 2021 @ 5:00 pm

Due to maintenance, the Great Lakes cluster and storage systems (/home and /scratch) will be unavailable Monday, August 9, 2021, 6 a.m. – Wednesday, August 11, 2021 5 p.m.

Copy any files you might need during the maintenance window to your local drive using Globus File Transfer.

Contact arc-support@umich.edu if you have any questions.  More details and updates are available here.

Planned Updates

  • CentOS 7.9
  • Slurm 20.11
  • NVIDIA driver updates
  • OFED updates
  • InfiniBand updates
  • Policy change: Slurm jobs will no longer automatically re-queue after a hardware failure. Slurm jobs can enable re-queueing in their slurm submission script with the --requeue option.
  • New default versions for the following software packages:
  • Module Name Old Default Version New Default Version
    matlab 2018b 2020a
    mathematica 12.1.0 12.2.0
    R 3.6.1 4.1.0
    Rtidyverse 3.6.1 4.1.0
    RStudio 1.3.959 1.4.1717
    tensorflow 2.3.2 2.5.0

Due to a change in the cluster configuration that affects process placement for MPI jobs, a number of module files have been updated to provide a consistent user experience. The modifications include setting new Slurm variables and adding a wrapper script that will be called with some Intel MPI (IMPI) modules when using mpirun on a login node.

Jobs that run the following software/commands will likely be affected:
mpirun, matlab, mpiexec.hydra, CESM (with IMPI), LSDYNA, Abaqus, some ANSYS apps, or anything else that uses IMPI.

If you notice that your jobs using any of the indicated commands are running more slowly, please let us know by submitting a ticket to arc-support@umich.edu.


August 9, 2021 @ 6:00 am
August 11, 2021 @ 5:00 pm
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