Status

Known issues

[Tue 13 Sept 2022] Unscheduled downtime HPC-UGent Tier-2 login nodes

• [16:00] Problem resolved, login nodes are available again.
• [15:25] Due to a network issue login nodes became unavailable.

Planned maintenance

Planned UGent network disruption (11 July 2022)

A scheduled disaster recovery procedure test took place in the datacenter of Ghent University.
This resulted in disparate network disruptions throughout 11 July 2022, affecting the following infrastructure:

• VSC accountpage
  https://account.vscentrum.be will be unavailable throughout the day.
  Connected services (such as the VSC firewall) will also be unreachable.
• UGent Tier2 infrastructure
  Access to the Tier2 login nodes and webportal, and access to the internet from the HPC infrastructure (incl. external license servers) will not be possible during the day.
  Jobs that specifically rely on an external connection (e.g. license server) could terminate prematurely on Monday 11 July.
  Other queued and running jobs should not be affected.
• VSC Tier1 Compute Hortense
  Access to the Tier1 Hortense login nodes and webportal will not be possible from the UGent network, but should still be possible via other university networks (KULeuven, VUB, UAntwerpen).
  Access through the VSC firewall application will also not be possible.
  Note that the Tier1 Hortense infrastructure will also not be able to connect to the internet (incl. external license servers) during the day.
  Jobs that specifically rely on an external connection (e.g. license server) could terminate prematurely on Monday 11 July.
  Other queued and running jobs should not be affected.
• VSC Tier1 Cloud
  VSC Tier1 Cloud services (including web dashboard/API) and VMs will not be accessible during the day.
  Project VMs and storage should not be affected (everything will continue to run as usual), but will not be reachable from external networks.

Migration of Tier-2 clusters to RHEL8 (March-May 2022)

During the first half of 2022,  the HPC-UGent login nodes and the oldest Tier-2 clusters that are using CentOS 7 as operating system
were migrated to the RHEL8 (Red Hat Enterprise Linux 8) operating system.

More information, including an overview of the impact of this migration, is available here.

Reminders

• [Wed 9 June 2021] New job command wrappers
  We switched to new job command wrappers for all HPC-UGent Tier-2 clusters.
  This switch should be transparant: you don't need to change your workflow or job scripts.
• [Wed 27 May 2020] All SSH public keys uploaded before 20 May 2020 have been revoked.
  More information regarding this security operation at https://docs.vscentrum.be/en/latest/security_measures_20200520.html

Contact

For issues regarding Tier-2 UGent systems, contact hpc@ugent.be

For issues regarding Tier-1 Compute (VSC), contact compute@vscentrum.be

For issues regarding Tier-1 Cloud (VSC), contact cloud@vscentrum.be

Cluster load of Tier-2 UGent systems

Consult http://hpc.ugent.be/clusterstate/

(only available within the UGent network)