MHPCC
License Server Outage - Saturday, 20th December 2014
18 December 2014
On Saturday, 20th December 2014, there will be a 20 minute license server and Advanced Reservation Service (ARS) outage due to DREN upgrades. The outage will occur sometime between 0900-1600 EST.

Software licenses: Production jobs running at all DSRCs that require licenses during the outage may fail during the outage period.

ARS: All scheduled advance reservations will continue as requested. During the outage, no new advanced reservations may be made.

We regret any inconvenience this required outage may cause. All emergency, current, and upcoming outages can be viewed on the front page of centers.hpc.mil.

If you have any questions, please contact the Consolidated Customer Assistance Center (CCAC) by phone at 877-CCAC-039 (877-222-2039) or via email at help@ccac.hpc.mil.

Thank you,
MHPCC User Services
MHPCC Facilities/Infrastructure Maintenance - Saturday, December 6th, 2014
26 November 2014
Due to required infrastructure modifications, the MHPCC DSRC will undergo a full power outage on Saturday, December 6th, 2014 0800 - 1700 (HST).

There will be no connectivity to any system at the MHPCC DSRC and all systems will be powered down.

Please plan accordingly.

Thank You,
MHPCC User Services

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Resource Limits

Disk Limits and Usage

  1. Disk quotas in effect for all users
  2. Mass storage

    MHPCC provides virtually unlimited data storage to its Riptide users via the data archive system. The hostname of the archival system for each platform is available in the ARCHIVE_HOST environment variable. An individual user's directory on this system is available through the ARCHIVE_HOME environment variable. Please consult the online documentation for details on how to use the archive system.

  3. Temporary disk space

    There are several file systems available for temporary disk space:

    RIPTIDE

    Name Description Size Purge Policy
    /scratch Local and unique to each node. 30 Gbytes After each run
    See WORKDIR environment variable Global shared scratch 200 Tbytes Files older than 14 days are purged

  4. How you can help

    Disk usage will be periodically reviewed by MHPCC and if it is determined that any user is consuming an excessive amount of disk space, that user will be notified. For the most part, however, MHPCC encourages all of its users to practice "good neighbor" computing, keeping in mind that the system is shared by hundreds of other users and that disk resources are limited. Some practices which help all users include:

    • Always remove your files from public, shared disk space as soon as you no longer need them. This includes files in any of the scratch file systems.
    • Periodically "clean up" your home directory to remove old and unnecessary files.
    • Check with the MHPCC Help Desk () before installing software in your home directory which might be of general use to other users. In this way, MHPCC can install one version in a single location and prevent the waste of disk space that occurs when multiple versions are installed in various user home directories.

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