Messages & Announcements

  • 2016-10-11:  HCC Anvil web interface maintenance complete
    Category:  Maintenance

    Maintenance on the HCC Anvil web interface is complete. If you have any questions or comments, please send a note to hcc-support@unl.edu.


    Maintenance on the HCC Anvil web interface is complete. If you have any questions or comments, please send a note to hcc-support@unl.edu.

  • 2016-10-10:  HCC Anvil web interface maintenance: Tue, Oct 11 at 10am
    Category:  Maintenance

    We have a scheduled maintenance for the HCC Anvil web interface for Tuesday, October 11 starting at 10am.

    Access to the anvil-beta.unl.edu web interface, including creation, deletion, and web console access to VMs, will be unavailable until the maintenance is complete. Running virtual machines will not be affected.

    During this maintenance, we will be moving the web service to new hardware. We anticipate the move will be completed by the end of the day. We will send a followup notice when work is complete.


    We have a scheduled maintenance for the HCC Anvil web interface for Tuesday, October 11 starting at 10am.

    Access to the anvil-beta.unl.edu web interface, including creation, deletion, and web console access to VMs, will be unavailable until the maintenance is complete. Running virtual machines will not be affected.

    During this maintenance, we will be moving the web service to new hardware. We anticipate the move will be completed by the end of the day. We will send a followup notice when work is complete.

  • 2016-09-29:  final warning: files to be removed from /work on Tusker
    Category:  General Announcement

    This notice affects users with data on the /work filesystem of Tusker. Files not accessed for over 6 months will be removed this week.

    HCC now purges (i.e. removes) files from /work that are over 6 months old. You may run

    hcc-purge

    to see which files (if any) are old enough to be removed at the next purging at any time. Purges will be performed each week on an ongoing basis moving forward. Scans for files to purge will be done twice a week. Please see

    https://hcc-docs.unl.edu/display/HCCDOC/Handling+Data

    for further details.

    All traces of the originally purged files will be removed this week. The initial purging was simply a move to a quarantine area as a safeguard since this is a newly implemented policy, but the new location also was on /work. The /work file system is over 90% full, and the 18 Million files totaling over 81 TB of space will be removed. All of these files had not been accessed in over 6 months. This should help the overall performance of the system and will avoid an overrun of the /work filesystem. If you need a place to store data longer term, Attic space is now available for $60/TB/year (and is stored redundantly both in Lincoln and Omaha).

    Best regards,
    David Swanson


  • 2016-09-22:  Tusker: /work filesystem performance issues resolved
    Category:  General Announcement

    The Tusker /work filesystem is running normally. A reboot of the Lustre metadata server (MDS) was required.


    The Tusker /work filesystem is running normally. A reboot of the Lustre metadata server (MDS) was required.

    The issue on the MDS looked very similar to the performance degradation experienced 2016-09-07. A different process was used to recover the MDS and the logs indicate that no Lustre clients were evicted. The Slurm logs show jobs that ended during the MDS recovery window did so successfully or ran into job time limits.

    These are promising log indications that running jobs blocked when interacting with /work and recovered when the MDS returned to service.

    We still advise to check your job state if you had running jobs on Tusker as the degraded performance of /work may have impacted jobs that ran into time limits.

    Please contact us at hcc-support@unl.edu with any questions.

  • 2016-09-22:  Tusker: /work filesystem performance issues
    Category:  System Failure

    We are investigating performance issues with the Tusker /work filesystem. There may be disruption to running jobs as we work to correct the issue. We will follow up with details when the maintenance is complete.


    We are investigating performance issues with the Tusker /work Lustre filesystem. Around 5:00am on Thursday, performance of the Tusker /work filesystem dropped significantly.

    To correct the problem, we are restarting Lustre services. This may disrupt running processes which are reading or writing files on /work.

    We will follow up with more details when the maintenance is complete.

Pages