Messages & Announcements

  • 2018-10-15:  Rolling updates on HCC cluster resources
    Category:  General Announcement

    Security updates are being applied to the Crane, Sandhills and Tusker clusters. The rolling updates are applied as soon as the oldest job on a worker node finishes, potentially keeping new jobs from starting until the updates are applied. This will cause pending jobs to report lengthened wait times in queue with a reason of "Priority," "Resources," or "ReqNodeNotAvail, UnavailableNodes," particularly if the requested time by the job exceeds the time before the worker nodes' resources drain. Shorter jobs will likely have more resources to run on in the next couple of days, as long as they finish before the oldest job completes on draining worker nodes.

    All updates will be finished by 10PM Friday, October 19th.


    Security updates are being applied to the Crane, Sandhills and Tusker clusters. The rolling updates are applied as soon as the oldest job on a worker node finishes, potentially keeping new jobs from starting until the updates are applied. This will cause pending jobs to report lengthened wait times in queue with a reason of "Priority," "Resources," or "ReqNodeNotAvail, UnavailableNodes," particularly if the requested time by the job exceeds the time before the worker nodes' resources drain. Shorter jobs will likely have more resources to run on in the next couple of days, as long as they finish before the oldest job completes on draining worker nodes.

    All updates will be finished by 10PM Friday, October 19th.

  • 2018-10-02:  SANDHILLS will no longer accept new jobs after October 15th 2018, cluster is being retired
    Category:  General Announcement

    As of October 15th Sandhills will no longer accept job submissions. Jobs submitted up to that date will be allowed to run to completion as normal.

    The /home and /work filesystems for Sandhills, along with the login and transfer nodes, will remain available beyond October 15th to allow users time to migrate their data to other places such as the shared /common filesystem or the Crane cluster. It is *not* recommended to migrate data to Tusker at this time as it will be physically relocated in the near future and be completely unavailable during that time.

    We will keep the Sandhills filesystems, login, and transfer nodes available until the end of the 2018 calendar year at which point they will be turned off completing the retirement of Sandhills.

    For additional information on the Sandhills retirement and Tusker migration see the original announcement at https://newsroom.unl.edu/announce/holland/8444/48362.


    As of October 15th Sandhills will no longer accept job submissions. Jobs submitted up to that date will be allowed to run to completion as normal.

    The /home and /work filesystems for Sandhills, along with the login and transfer nodes, will remain available beyond October 15th to allow users time to migrate their data to other places such as the shared /common filesystem or the Crane cluster. It is *not* recommended to migrate data to Tusker at this time as it will be physically relocated in the near future and be completely unavailable during that time.

    We will keep the Sandhills filesystems, login, and transfer nodes available until the end of the 2018 calendar year at which point they will be turned off completing the retirement of Sandhills.

    For additional information on the Sandhills retirement and Tusker migration see the original announcement at https://newsroom.unl.edu/announce/holland/8444/48362.

  • 2018-09-19:  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.

  • 2018-09-19:  Crane: /work filesystem unplanned downtime
    Category:  System Failure

    The /work filesystem for Crane is partially unavailable. One of the storage servers stopped responding around 9:00pm Tuesday. The storage server has been rebooted and we are currently running filesystem checks.

    Pending jobs will be held until the maintenance is complete.


    The /work filesystem for Crane is partially unavailable. One of the storage servers stopped responding around 9:00pm Tuesday. The storage server has been rebooted and we are currently running filesystem checks.

    Pending jobs will be held until the maintenance is complete.

  • 2018-09-06:  Tusker: Maintenance complete
    Category:  General Announcement

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


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

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