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Quarterly Planned Downtime
Storrs HPC conducts cluster maintenance on a regular schedule throughout the calendar year. During the days listed below, the cluster will be scheduled for downtime to conduct these tasks. Downtime begins at 7AM and is planned to last 8 hours, although the duration may vary.
Maintenance tasks include, but are not limited to:
· Firmware updates
· Kernel updates
· Network maintenance
· Major application reconfiguration
· Data Center operations
· Major hardware repair, reconfiguration, or installation
Detailed messages will be sent out via the STORRS-HPC_L mailing list at 14 days and 7 days out. Please make sure you have this sender added to any email whitelists to avoid being marked as Spam. If you need to be added to the list, please send a request to hpc@uconn.edu.
Regularly scheduled maintenance days are listed below:
Scheduled Maintenance Days |
|---|
Third Tuesday of February |
Third Tuesday of May |
Third Tuesday of August |
Fourth Tuesday of November |
Weekly Planned Maintenance
Weekly maintenance does not require downtime. Jobs typically continue to run and the scheduler remains available, thus no advance notice is provided, except under special circumstances. Tasks include, but are not limited to:
· OS security updates
· Minor configuration changes
· Minor hardware repairs
The following tasks are performed on a regular basis:
Login4 reboot and update every Tuesday at 6:00 am EDT/EST.
Login5 reboot and update every Wednesday at 6:00 am EDT/EST.
Login6 reboot and update every Thursday at 6:00 am EDT/EST.
OSG nodes reboot and update every other Thursday at 10:30 am EDT/EST.
25% of the compute and GPU nodes are scheduled for reboots and updates every other Tuesday and Thursday and reboot as jobs finish. (Effectively every node is scheduled to reboot every 2 weeks.)
Example calendar:
Sunday | Monday | Tuesday | Wednesday | Thursday | Friday | Saturday | |
|---|---|---|---|---|---|---|---|
Week 1 | 1/4 cluster scheduled reboots; Login4 reboot | Login5 reboot | 1/4 cluster scheduled reboots; OSG nodes reboot; Login6 reboot | ||||
Week 2 | 1/4 cluster scheduled reboots; Login4 reboot | Login5 reboot | 1/4 cluster scheduled reboots; Login6 reboot | ||||
Repeat forever | |||||||
Unplanned Maintenance
Occasionally, Storrs HPC is forced to conduct unscheduled maintenance that may result in, or result from, a temporary outage. Such instances may include, but not be limited to:
Critical security updates
Hardware failures
Infrastructure-related outages
Extreme weather
When such instances occur, Storrs HPC will notify its user base as soon as possible via the STORRS-HPC_L Listserv email, and will provide status updates throughout the outage.
Please forward any questions to hpc@uconn.edu