Messages & Announcements

  • 2018-08-27:  HCC Clusters Downtime Planned
    Category:  Maintenance

    This maintenance outage for software updates affects Crane, Tusker and Sandhills. The downtime dates will be August 31st for Sandhills, September 4th for Crane and September 6th for Tusker. Jobs which cannot complete before the downtime day at 9:00am will be held in queue until the maintenance is complete. A follow-up announcement will be posted when the system is ready for production use.


  • 2018-08-17:  Crane: JupyterHub maintenance completed
    Category:  Maintenance

    The Crane JupyterHub maintenance has been completed and the system is available for use.

    If you experience any problems, please contact hcc-support@unl.edu


  • 2018-08-15:  Crane: JupyterHub maintenance Fri., Aug 17th @ 1pm
    Category:  Maintenance

    The Crane JupyerHub interface will be unavailable on Friday, August 17th, starting at 1pm for maintenance. This includes the Jupyter Notebook and the Sandstone interfaces. Maintenance is expected to take a half-hour or less. Users are encouraged to save and halt any running sessions to avoid unexpected issues. Batch job SLURM submissions will be unaffected by this maintenance. For questions or concerns, contact hcc-support@unl.edu.


  • 2018-08-14:  Crane: /work filesystem downtime resolved
    Category:  General Announcement

    The /work filesystem for Crane is restored as of 11:30am. A filesystem check was completed with no errors found.

    Running jobs which were accessing /work stalled until the filesystem was restored. This may have caused jobs to exceed their time limit. There was no data loss from this outage.


  • 2018-08-14:  Crane: /work filesystem unplanned downtime
    Category:  System Failure

    The /work filesystem for Crane is partially unavailable. One of the storage servers stopped responding around 7:00am today. Initial debugging suggests an issue with the Lustre server using excessive kernel memory. The storage server has been rebooted and we are currently running filesystem checks.

    Pending jobs will be held until the maintenance is complete.


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