Messages & Announcements

  • 2016-08-11:  Crane: Maintenance complete
    Category:  General Announcement

    Maintenance is complete on Crane. Please let us know of any troubles using the cluster by sending email to hcc-support@unl.edu


    Maintenance is complete on Crane. Please let us know of any troubles using the cluster by sending email to hcc-support@unl.edu

  • 2016-08-04:  HCC Tusker Downtime Planned - August 15, 2016
    Category:  Maintenance

    This maintenance outage for software updates affects Tusker only. Jobs which cannot complete before August 15th at 08:00am 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.


    To minimize the impact to running jobs we are declaring a downtime for Tusker to complete this work. We will use this maintenance window to update various software components across the cluster. The Tusker login node will also be updated and will require users to log off. Users will be denied access to the Tusker login node until the maintenance is completed.

  • 2016-08-04:  HCC Crane Downtime Planned - August 10, 2016
    Category:  Maintenance

    This maintenance outage for software updates affects Crane only. Jobs which cannot complete before August 10th at 8:00am 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.


    To minimize the impact to running jobs we are declaring a downtime for Crane to complete this work. We will use this maintenance window to update various software components across the cluster. The Crane login node will also be updated and will require users to log off. Users will be denied access to the Crane login node until the maintenance is completed.

  • 2016-08-03:  Sandhills: Check job status
    Category:  System Failure

    System issues today affected jobs on Sandhills. If you had pending jobs on Sandhills since the upgrade, please check their state as it may be necessary to resubmit these jobs.


    A software update was made to the Sandhills configuration management service this morning. It later became apparent that the service was giving incorrect data to the rest of the cluster, causing communications problems for the Slurm resource manager. This caused job startup failures for jobs starting during this window of time. It also made running jobs appear to have exited out to the controller, when in fact, they didn't. To clear up the inconsistent state of jobs between the controller and the workers, all jobs running on the workers that escaped the Slurm controller's knowledge were killed. This was unfortunately a necessary step to return the cluster to normal operation.

  • 2016-08-02:  Sandhills: Maintenance complete
    Category:  General Announcement

    Maintenance is complete on Sandhills. Please let us know of any troubles using the cluster by sending email to hcc-support@unl.edu


    Maintenance is complete on Sandhills. Please let us know of any troubles using the cluster by sending email to hcc-support@unl.edu

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