MHPCC
Riptide & US Maintenance - Wednesday, April 22nd, 2015
13 April 2015
The MHPCC Riptide system will be undergoing scheduled maintenance on Wednesday, April 22nd, 2015 from 0800 – 2200, (HST).

Logins to Riptide will be suspended starting at 0730 (HST).

Please plan accordingly.

If you have any questions about this informational message, please contact the Consolidated Customer Assistance Center (CCAC). The CCAC can be reached via any of the following methods:

- http://centers.hpc.mil/about/contact.html
- 1-877-222-2039
- help@ccac.hpc.mil

Thank you,
MHPCC User Services
CCAC to Become HPC Help Desk - Monday, May 18th, 2015
31 March 2015
The Consolidated Customer Assistance Center is Getting a New Name.

In order to more accurately describe the services provided, the Consolidated Customer Assistance Center (CCAC) will be renamed the "HPC Help Desk." This change will be effective 18 May, 2015.

On this date, access to the HPC Help Desk ticket system will change from the current location (https://help.ccac.hpc.mil) to the new https://helpdesk.hpc.mil. Accordingly, the email address to contact the HPC Help Desk will be help@helpdesk.hpc.mil.

The old URL and email address will remain available with auto forwarding and redirection for a period of time, but you are encouraged to update your bookmarks and contacts with these new addresses starting 18 May 2015.

The phone number, 1-877-222-2039, will remain the same.

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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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