Gateway
Emergency Scratch Purge on August 26
Please be advised that an emergency scratch purge will be executed on OSC Research Data Storage today, August 26, 2026, starting from 3pm. See this for more details: https://www.osc.edu/resources/technical_support/known_issues/emergency_maintenance_research_data_storage_scratch_purge
System Downtime August 11 2026
A downtime for OSC HPC systems is scheduled from 7 a.m. to 9 p.m., Tuesday, August 11, 2026. The downtime will affect the Pitzer, Cardinal and Ascend Clusters, web portals, the state-wide licenses and HPC file servers. MyOSC (the client portal) will be available during the downtime. In preparation for the downtime, the batch scheduler will not start jobs that cannot be completed before 7 a.m., August 11. Jobs that are not started on clusters will be held until after the downtime and then started once the system is returned to production status.
Update OnDemand Desktop Launch Form
The launch forms for all OnDemand Desktops will be updated during the upcoming scheduled downtime. For more information, please visit: https://www.osc.edu/resources/technical_support/hpc_changelog/2026/update_ondemand_desktop_launch_form.
Hosted Services
OSC provides hosted instances of specialized applications that require dedicated server infrastructure and authentication methods. These services run continuously on OSC systems, allowing research groups to access applications through a web browser.
Rolling Reboot for Security Fix
A rolling reboot is in progress to address CVE-2026-23111 for all clusters, including Ascend, Cardinal, and Pitzer. Login nodes will be rebooted first and access will be temporarily disrupted. Compute nodes will reboot in a rolling fashion; running jobs will not be impacted. See: https://www.osc.edu/resources/technical_support/known_issues/rolling_reboot_for_security_fix
Temporary Login Node Instability on Ascend
We are currently experiencing temporary instability on the Ascend login nodes, which may result in slow response times or unexpected session disconnects. Our team is actively investigating the issue and will share updates as more information becomes available.
ptrace Disabled Across OSC Systems
ptrace has been disabled globally across all OSC systems to mitigate a newly identified Linux kernel vulnerability. See this known issue for more details: https://www.osc.edu/resources/technical_support/known_issues/ptrace_disabled_across_osc_systems
