The Hopper cluster will undergo biannual maintenance this January. Hopper will be unavailable between 6:00AM on Thursday, 01/16/2025 and the end of Friday, 01/17/2025 for scheduled maintenance. We plan to upgrade the compute, network, and storage infrastructure of the cluster during this maintenance window.
Maintenance Schedule:
– Start Time: Thursday, January 16, 6:00AM
– End Time: Friday, January 17, End of Day
Affected services:
1. Login/Head and Compute Nodes: All login/head and compute nodes will be inaccessible. Users will not be able to log in or submit jobs during this time.
2. Open On-Demand (OOD): The Open On-Demand (OOD) interface will be inaccessible. Users are advised to plan their activities accordingly and save any unsaved work.
3. Storage and Related Services: Most storage services, including Samba and Globus, will have very limited and intermittent availability.
4. Virtual Machines: Most virtual machines will have intermittent availability. Users with virtual machines should be prepared for potential interruptions in service.
All SLURM partitions will be drained when the maintenance window starts. Any jobs started between now and the maintenance period must be timed to end before the maintenance window begins. When starting a job, make sure to set the time parameter in SLURM to less than 7 days and reduce it as the maintenance window gets closer, for example:
We have provided a script named ‘time-to-maintenance-window.py ‘ which you can run to generate an appropriate “–time” parameter for your scripts:
>$ time-to-maintenance-window.py
A maintenance window scheduled to start on 2025-01-16 06:00:00.
Please use the following or smaller time limit. Note that some partitions have time limits less than 2-16:00:00.SBATCH –time 2-16:00:00
Please note that any jobs that are configured to run past the planned downtime dates will not start until after the maintenance is complete.
The clusters should be back online by the end of 01/17/2025.
If you have any questions or concerns, please email us at [email protected].