The OLCF User Assistance Center provides direct support to users of our computational resources. We aim to simplify the technical coordination required to use leadership-class supercomputers by working closely with research teams, maintaining documentation for all aspects of our systems, and by solving user issues as they arise.

Hours 9am – 5pm EST Monday – Friday, exclusive of holidays
Help Ticket Submission or Ticket Submission Webform
Phone 865-241-6536
Fax 865-241-4011
Address 1 Bethel Valley Road, Oak Ridge, TN, 37831
(The OLCF User Assistance Center is located at the Oak Ridge National Laboratory, Building 5600, Room C103.)
Note: Outside of business hours, calls are directed to the ORNL Operations Staff. If you require urgent, immediate assistance, they can be reached at the number listed above. If your request is not urgent, please submit a help ticket by email or the Ticket Submission Webform where it will be answered by an OLCF User Assistance member the next business day.

Communication to Users

We provide many ways to stay informed about what’s happening at the center. Whether we’re performing maintenance, hosting an upcoming hackathon, or planning a monthly conference call, we’ll keep you in the loop.

System Statuses

System statuses can be found in several locations. The OLCF homepage includes a listing of our major compute resources and their current availability, as well as upcoming downtimes. This information also has a dedicated Center Status page. Similarly, the status of a particular system can be found on its respective System User Guide. When a system’s state changes (up to down, or down to up), an automated message is sent to the system’s notice mailing list.

Weekly Updates

Each week, typically on Wednesday morning, an email announcing the next week’s scheduled outages is sent to all users. This message also includes meeting announcements and other items of interest to all OLCF users.

Twitter Feeds

The OLCF posts messages of interest on the OLCF Twitter Feed. We also post tweets specific to system outages on the OLCF Status Twitter Feed.

Mailing Lists

Our primary systems each have two mailing lists, Announcement and Notice. Announcement lists provide users with email messages of general interest (system upgrades, long-term outages, etc.) Since the mailing frequency is low and the information sent is important to all users, users are automatically subscribed to the appropriate Announcement lists when their account is created.

Notice lists provide a higher-volume email notification system. A system’s Notice list will automatically announce system state changes and other notable system events. Users who are actively using a system are automatically added to a system’s Notice list. When a system changes state (up to down, or down to up), an automated email is sent to members of the system’s notice list. We also send additional notable issues and time sensitive events to these lists. Available Notice lists include: titan-notice, rhea-notice, eos-notice, and spider-notice.

If you wish to be added or removed from a mailing list, please contact the OLCF User Assistance Center.


To assist users in managing their project allocations and system usage, we provide the My OLCF web application. My OLCF can be accessed at with a valid OLCF username and SecurID fob passcode. My OLCF provides valuable information about projects on a per user basis. 

Examples of the metrics that can be found on My OLCF include:

  • YTD usage by system, subproject, and project member
  • Monthly usage by system, subproject, and project member
  • YTD usage by job size groupings for each system, subproject, and project member
  • Weekly usage by job size groupings for each system, and subproject
  • Batch system priorities by project and subproject
  • Project members
Note: The OLCF User Assistance Center can also help you make special requests and provide exemptions to OLCF Policies. For more information, see the Special Requests and Policy Exemptions section at the end of the OLCF Policy Guide.