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ARC-TS Winter 2020 Maintenance

January 6, 2020 @ 6:00 am - January 8, 2020 @ 5:00 pm

Great Lakes, Lighthouse, Armis2, ConFlux, Cavium HPC, and their storage systems (/home and /scratch) will be unavailable starting at 6 a.m. on Monday, January 6, 2020, and returning to service on Wednesday, January 8, 2020. We suggest you copy any files you might need prior to the start of maintenance.

The updates are being made to software, hardware, and operating systems to improve the performance and stability of ARC-TS services. We try to encapsulate the required changes into two maintenance periods per year and work to complete these tasks quickly, as we understand the impact of the maintenance on your research.

Maintenance Details
Great Lakes, Lighthouse, and Armis2 maintenance tasks:
OS updates
Update to Slurm 19.05 (pending testing)
OFED (OpenFabrics) updates for InfiniBand
GPFS firmware (Great Lakes)
Globus hardware update (Lighthouse; this will not affect how anyone will access Lighthouse via Globus)
Transition /home directories to new hardware
Transition /scratch directories to new hardware (Lighthouse, Armis2)

ConFlux maintenance tasks:
OS Updates
GPFS/ESS (pending)

Cavium HPC updates:
OS updates
Update to Slurm 19.05 (pending testing)

Countdown to maintenance
For Great Lakes, Lighthouse, and Armis2 HPC jobs, you can use the command “maxwalltime” to discover the amount of time remaining until the beginning of the maintenance. Jobs requesting more walltime than remains before the maintenance will be queued and started after the maintenance is completed.

Status updates
We will post status updates on our Twitter feed ( https://twitter.com/arcts_um ) throughout the course of the maintenance and send an email to all HPC users when the maintenance has been completed. Updates will also be compiled at http://arc-ts.umich.edu/winter-2020-maintenance/.

Contact hpc-support@umich.edu if you have any questions.

Details

Start:
January 6, 2020 @ 6:00 am
End:
January 8, 2020 @ 5:00 pm
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