Messages & Announcements

  • 2017-06-05:  Crane /work filesystem unplanned downtime
    Category:  System Failure

    The /work filesystem for Crane is partially unavailable. One of the storage servers crashed and rebooted. We are now running a filesystem check before placing the server back online. Pending jobs will be held until the maintenance is complete.


    The filesystem check has been completed with no errors found. The /work filesystem is back online. Running jobs may be affected, but there was no data loss from this outage.

    We believe the storage server crash was triggered by I/O delays as the RAID controller was rebuilding a failed disk drive. The rebuild is still running and we are monitoring the system.

  • 2017-05-19:  Crane: Maintenance complete
    Category:  General Announcement

    Maintenance is complete on Crane. Check changes made to the cluster in the following details section. Please let us know of any troubles using the cluster by sending email to hcc-support@unl.edu


    Changes made during this downtime:

    All partitions on Crane now have a uniform maximum time limit of 7 days.

    The opa partition has been removed. To limit job submissions to nodes that have Omni Path fabric, use the following Slurm directive while submitting jobs to the batch partition:

    #SBATCH --constraint=opa

    The opaguest partition has been renamed to guest. Priority access nodes having Infiniband and Omni Path fabrics have been added to this partition. Use

    #SBATCH --constraint=ib
    or
    #SBATCH --constraint=opa

    to limit which nodes your jobs will be considered on. Any job that runs within the guest partition can be preempted by jobs submitted by the owners of the respective hardware.

  • 2017-05-17:  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

  • 2017-05-11:  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

  • 2017-05-11:  HCC Crane Downtime Planned - May 18, 2017
    Category:  General Announcement

    This maintenance outage for software updates affects Crane only. Jobs which cannot complete before May 18th 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.


    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.

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