Oscar Upgrade to RHEL9

[yangliu2009]

CCV will conduct the scheduled Oscar maintenance that upgrades the operating system and module system in January. To facilitate the transition, CCV has set up a mini cluster with the upgraded OS and module system for users to test their programs/jobs.

• Users can connect to the mini RHEL/9.2 cluster by running the command ssh -X login009 on the current login nodes (login007 or login008). For more details, refer to this page.

• Users can drop in during this Zoom meeting on Mondays and Wednesdays between 3 and 4pm before winter break for any assistance for the new cluster.

• We encourage users to test their programs/jobs on this cluster and reach out to us ([email protected]) for any help, issues or feedback.

Please see below for details on the scheduled maintenance.

Maintenance Window:

• Note: Below is the estimated window. The exact dates and times are still tentative.
• Start: 1/9/2024 5:00 am EST
• End: 1/12/2024 5:00 pm EST

Maintenance Description:

• The OS will be upgraded from RHEL/7.2 to RHEL/9.2. For exact details please refer to this documentation page

• We are increasing the cpu cores for priority-GPU accounts. Please see above link

• Oscar modules system will be migrated to LMod . For a comprehensive list of old and new modules refer to this documentation page.

• Expected Impact:

• All Oscar services will be unavailable during the downtime

• Jobs which won’t complete by the beginning of the maintenance window won’t start and ‘myq/squeue’ will report (ReqNodeNotAvail, Reserved for maintenance)

• Instructions for Users

• Users will need to resubmit jobs after the maintenance

• Users will need to update their job submission scripts since Oscar module names/versions will be different in the new module system.

• Locally installed packages/environments may not work after the maintenance due to OS upgrade. Users are recommended to reinstall and test their installed packages on the RHEL/9.2 mini cluster before the downtime.