User Updates

Texascale Days allows participating researchers the space and time to compute some of their biggest data and consult with our experts on benchmarking and optimizations. The Vista GH nodes will be reserved for Texascale Days - large scale runs of at least half system size (up to 256 nodes) or full system size (up to 512 nodes) during the third week of December.  This Texascale Days event will only support benchmarking runs, 2 - 4 hours in length, not production runs. This event allows our researchers the opportunity to work on problems that may not be possible at a smaller scale. To be eligible to participate on Vista, your application must have already successfully run on at least 64 GH nodes on Vista.To request to participate, please fill out and submit the form before end of business December 10.Link to form: https://forms.gle/mfxQtUPLv1rfLE5w9Please submit any questions you may have through the TACC ticketing system or feedback form.https://tacc.utexas.edu/portal/tickets

TACC PROJECTS, ALLOCATIONS, AND ACCOUNTS SYSTEM MAINTENANCE November 4, 9AM - 1PM CentralDuring this maintenance, the underlying services for TACC projects, allocations, and user accounts will be unavailable.Users will be unable to make any changes to the following during this time: *Creating new projects *Modifying existing allocations *Updating account or user profilesTACC compute resources and login services will otherwise remain operational. Please plan any necessary account or project updates before or after the designated maintenance time.Due to changes in TACC security policy, you may be required to update your TACC account profile.

October 14, 2025 9AM - 11AM CentralDuring this maintenance window, the underlying services for TACC projects, allocations, and user accounts will be unavailable.   Users will be unable to make any changes to the following during this time:    Creating new projects Modifying existing allocations Updating account or user profiles   TACC compute resources and login services will otherwise remain operational. Please plan any necessary account or project updates before or after the designated maintenance time.   Please submit any questions you may have via the TACC User Portal: https://tacc.utexas.edu/portal/tickets

As part of the construction of the NSF Leadership Class Computing Facility, the hardware underlying the TACC "Ranch" tape archive system is being replaced. This new Ranch will allow us to expand the capacity of the archive to an exabyte and beyond over the next several years. If there is data in the archive you wish to keep on the new system, you will need to move it to the new hardware. Please carefully review the message below for important information on timelines, where to find your old data, where to write your new data, and directions on migrating. TimelineSeptember 30, 2025: New Ranch hardware will be available to general users.Begin migrating your data NOWExisting Ranch directories will be mounted as read only so that contents can be copied easilySeptember 30, 2025: Old Ranch hardware will be removed from service. For detailed instructions on what users need to do, please view our migration guide here: https://docs.tacc.utexas.edu/hpc/ranch-migration-2025/For very large data migrations (=1PB) or other special use cases, please contact the support team for assistance: https://tacc.utexas.edu/portal/tickets

Beginning Wednesday 09/24/2025, TACC is introducing new queue limits on all machines in order to improve fair access and reduce wait times for users.  The job submission limit will be brought down to 4x the running job limit. Previously this number was 10x.For example:Previous: Queue with a limit of 20 running jobs had a maximum limit of 200 submitted jobs.New: Queue with a limit of 20 running jobs has a maximum limit of 80 submitted jobs.The node limit per queue will remain the same.If you have any questions or concerns, please contact our support team here: https://tacc.utexas.edu/portal/tickets 

We would like to remind users that our purge policy applies to all /scratch file systems on Frontera. Until now, we have not needed to purge Frontera's /scratch2 filesystem however an increase in usage necessitates that we now enforce the policy. Per usual we reserve the right to purge any data created more than 10 days prior.Please note that deliberately modifying file access time (using any method, tool, or program) for the purpose of circumventing purge policies is prohibited.More details at: https://docs.tacc.utexas.edu/hpc/frontera/#scratchpolicyPlease submit any questions you may have via the TACC User Portal. https://tacc.utexas.edu/portal/tickets

During maintenance on Tuesday, September 16th from 8:00 AM to 3:00 PM (CDT) TAPIS will be moved to a new infrastructure for stability. Please note that while Jupyter logins will be impacted, running servers will not. Affected services:Any service using TAPIS, including Jupyter Hubs, as well as the following portals:A2CPSAMIAPCDBrainMapCIPPDesignSafeDigital Porous Media PortalFrontera PortalMATCSSINeuronex-3DEMPTDATAXUTRC2TACC StatsIf you have any questions please submit a ticket to the help desk here:https://tacc.utexas.edu/portal/tickets

The last chance to register for the TACC Symposium for Texas Researchers (TACCSTER) is Friday August 29th. TACCSTER will be held on September 23-24, 2025, in person in the ACB building on the J.J. Pickle Research Campus (PRC) of The University of Texas at Austin.TACCSTER is a meeting of scientists, engineers, and scholars from across the state who use, or would like to use, the Texas Advanced Computing Center (TACC) to advance their research goals. Researchers from across the country are welcome to attend. This meeting will be an opportunity for you to:Hear invited speakers from a broad range of disciplinesVisit ~50 posters from institutions all over TexasNetwork with your fellow TACC users and researchersLearn new and useful computing skills from a variety of tutorialsFind out information about the latest TACC systems and servicesTo register and for more information please visit: https://www.tacc.utexas.edu/taccsterPlease contact taccster@tacc.utexas.edu if you have any questions.

The TACC VPN infrastructure will not be available from 7:30 PM to 8:30 PM (CDT) on Tuesday, August 19th for maintenance. No logins will work but this will not affect other systems.

Effective immediately POB Vislab hours will now be 10:00AM to 3:00PM M-F until August 29th.

The TACC VPN infrastructure will not be available from 8:00 PM to 9:00 PM (CDT) on Wednesday, July 2nd for maintenance. The GlobalProtect client will be upgraded at this time.

Maintenance has been completed. All systems and services have been restored to full production.Users may now use their /work directories again.

Stampede3 is open for operations with the exception that the $WORK filesystem is not mounted. For more information, see the following:https://tacc.utexas.edu/news/user-updates/107580/

Lonestar6 is open for operations with the exception that the $WORK filesystem is not mounted. For more information, see the following: https://tacc.utexas.edu/news/user-updates/107580/

GraceHopper nodes in the gh and gh-dev queues are reserved for large scale benchmarking with Vista's TexaScale, while the gg queue is now open for the general public. Please note that the $WORK file system is currently unavailable due to maintenance.

Frontera is open for operations with the exception that the $WORK filesystem is not mounted. For more information, see the following: https://tacc.utexas.edu/news/user-updates/107580/

Detailed Schedule: https://tacc.utexas.edu/news/user-updates/107580/Beginning 8:00 AM Tuesday (6/17/25), all TACC systems will enter a maintenance period and be entirely unavailable. This will impact: All Production Systems, including Frontera, Lonestar 6, Stampede 3, and VistaPortal Functionality: account/allocation management, job submission, and applications (ex: Jupyter Notebooks) will be disabled across all portals (ex: DesignSafe, TAP)Account creation and modification via accounts.tacc.utexas.edu Allocation creation and modificationFrom Wednesday (6/18/25) through Thursday (6/19/25), certain systems and services will become available but the $WORK file system will still be under maintenance. In order to run jobs at TACC on Wednesday/Thursday you will need to: Copy any files, scripts, or other software necessary for your jobs over to $SCRATCH before 6/17/25Account and allocation services, jobs and apps via user portals, and Jupyter notebooks will remain unavailable during this time.All systems and services will be available again on 6/20/25.

Detailed Schedule of Systems and Services OutageStarting Tuesday (6/17/25), TACC will be entering a 2-phase maintenance which will run through Friday (6/19/25). Suggested User Preparation: Copy any files, scripts, or other software you need to run jobs to $SCRATCH before 6/17/25Assume extended wait times once job processing restarts For PIs: Ensure that appropriate users are on your allocation before 6/17/25Phase 16/17/258:00 AM (CDT)All systems and services will be offline and unavailable. This includes: All Production Systems, including Frontera, Lonestar 6, Stampede 3, and VistaPortal Functionality: account/allocation management, job submission, and applications (ex: Jupyter Notebooks) will be disabled across all portals (ex: DesignSafe, TAP)Account creation and modification via accounts.tacc.utexas.edu MFA re-pairing will be available for active accounts onlyAllocation creation and modification8:00 PM The following systems will be back online WITHOUT the $WORK filesystem mounted: Frontera, Lonestar 6, and Stampede 3VistaVista will be running TexaScale jobs at this time and will be unavailable to unscheduled users: https://tacc.utexas.edu/news/user-updates/107578/ Other services and systems will continue to be impactedPhase 26/18/25-6/19/25Admins will continue to perform maintenance on the $WORK filesystem. While certain machines will be back online, jobs can only be run from $SCRATCH. Users will be able to run jobs submitted from $SCRATCH provided that no part of the job references or touches the $WORK filesystem. Any files not previously copied over the $SCRATCH will be entirely inaccessible until the end of the maintenance period. When filesystem maintenance is complete, an announcement will be sent indicating that all systems and services have been restored. Have questions? Contact support here: https://tacc.utexas.edu/portal/tickets 

Starting June 17th, TACC will be performing routine maintenance on all systems that utilize Stockyard. Please note, as Stockyard is connected to all systems, any and all systems will be impacted by this maintenance outage:FronteraLonestar6Stampede3VistaUpdates on $WORK are expected to take longer than the typical, single day maintenance window. In order to reduce the impact on users, we will be unmounting Stockyard on all systems. All other filesystems will remain available. In order to continue running during this maintenance period, you must migrate all necessary files from $WORK to $SCRATCH.Files and workflows must be moved prior to June 17th. Once the outage begins, Stockyard will be entirely inaccessible until the end of maintenance.Full post about the work being done is here - https://tacc.utexas.edu/news/user-updates/107577/

The Grace Hopper nodes in the gh and gh-dev queues will be unavailable after the maintenance on Jun 17 through June 18. These nodes will be reserved for large scale benchmarking while the /work filesystem is unavailable. The queues will be restored when the benchmarking completes. This will be no later than June 19. Please submit any questions you may have via the TACC User Portal. https://tacc.utexas.edu/portal/tickets