ARC-TS Winter 2020 Maintenance
February 10 @ 6:00 am - February 12 @ 5:00 pm
We have rescheduled the previously announced winter maintenance for Great Lakes, Lighthouse, Armis2, ConFlux, and their storage systems (/home and /scratch) to begin at 6 a.m. on Monday, February 10, 2020, and return to service on Wednesday, February 12, 2020. Additionally, the Flux and Armis login nodes and storage systems (/home and /scratch) will be unavailable starting at the maintenance. This will enable the scheduled upgrades to the Turbo storage system which could not have been completed during the January maintenance. We suggest you copy any files you might need prior to the start of maintenance.
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.
Great Lakes, Lighthouse, and Armis2 maintenance tasks:
- OS updates
- Update to Slurm 19.05 (pending testing)
- OFED (OpenFabrics) updates for InfiniBand
- GPFS updates (Great Lakes)
- Globus hardware update (Lighthouse: this will not affect how anyone will access Lighthouse via Globus)
- Transition /home directories to new hardware (all clusters)
- Transition /scratch directories to new hardware (Lighthouse, Armis2)
ConFlux maintenance tasks:
- OS updates
- GPFS/ESS updates
- CUDA update
- InfiniBand switch software updates
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.
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 posted at http://arc-ts.umich.edu/winter-2020-maintenance/.
Contact email@example.com if you have any questions.