Reported Outages

TACC Network maintenance 20 August 2023

Resolved Posted by Cody Hammock on August 04, 2023
Outage start Sunday, August 20, 2023 8 a.m.
Expected end Sunday, August 20, 2023 11:45 a.m.

Resolved: TACC network maintnance is concluded as of 11:45 AM (CDT)

TACC network infrastructure will not be available from 8 AM to 2:00 PM (CDT) on Sunday, 20 August 2023. Network maintenance will be performed during this time.

CHI@TACC, KVM@TACC, and the Chameleon Portal will be affected. Baremetal instances and VMs will continue to run, but will be unreachable.

CHI@UC Datacenter outage July 28th-31st

Resolved Posted by Michael Sherman on July 17, 2023
Outage start Friday, July 28, 2023 12 p.m.
Expected end Monday, July 31, 2023 4:54 p.m.

CHI@UC is back online, and we're observing normal usage patterns so far.

Please reach out if you're encountering issues.

CHI@TACC Liqid nodes

Resolved Posted by Cody Hammock on July 05, 2023
Outage start Wednesday, July 05, 2023 11:13 a.m.
Expected end Wednesday, October 18, 2023 11:01 a.m.

RESOLVED: The faulty hardware has been identified and replaced. The Liqid subsystem is once again available to use.

The Liqid composeable hardware subsystem for CHI@TACC is experiencing intermittent issues with connecting the PCI devices with the connected hosts.

CHI@UC Network maintenance July 5th

Resolved Posted by Michael Sherman on June 22, 2023
Outage start Wednesday, July 05, 2023 9 a.m.
Expected end Wednesday, July 05, 2023 11:30 a.m.

The maintenance is proceeding well, but will likely take an extra 30 minutes or so, finishing at 11:30 rather than 11AM.

Afterwards, all instances will be acceissable as normal.

CHI@UC Issues mounting shared filesystem

Resolved Posted by Michael Sherman on June 12, 2023
Outage start Monday, June 12, 2023 6 a.m.
Expected end Tuesday, June 13, 2023 12 a.m.

We're currently observing an issue where some projects fail to mount the filesystem at CHI@UC, receiving an error message about an "RBAC Quota". We are currently investigating.

This is purely an access issue with new "storage leases", existing storage leases/mounts should be unaffected.

CHI@IIT down

Resolved Posted by Michael Sherman on June 12, 2023
Outage start Saturday, June 03, 2023 6 p.m.
Expected end Tuesday, June 13, 2023 6 p.m.

CHI@IIT is currently down, we've had a persistent hardware issue with the controller node at this side.

Site staff are currently investigating.

CHI@NU down

Resolved Posted by Michael Sherman on May 30, 2023
Outage start Tuesday, May 30, 2023 2 a.m.
Expected end Wednesday, June 07, 2023 11:36 a.m.

CHI@NU was down due to a hardware failure in the controller node. This has now been replaced, and the site is back online.

Datacenter Maintenance affecting CHI@UC May 7-12!

Resolved Posted by Michael Sherman on April 19, 2023
Outage start Sunday, May 07, 2023 5 p.m.
Expected end Friday, May 12, 2023 5:55 p.m.

05/12/23: CHI@UC is back online. All systems look stable, but we'll be keeping an eye on it over the weekend to be sure. 

Pleas let us know if you encounter issues!

Authentication system outage

Resolved Posted by Michael Sherman on April 03, 2023
Outage start Monday, April 03, 2023 10:06 a.m.
Expected end Monday, April 03, 2023 11:01 a.m.

Update 11:01am: The upstream issue seems to have resolved, and sites are again accessible. We'll be monitoring the situation to see if it remains stable.


Authentication to all sites is currently down due to a failure in our central authentication system.

Existing instances should be unaffected, but users won’t be able to create or modify existing instances.

This seems to be caused by a failure in our upstream DNS provider, we are working with them to get an ETA for resolution.

TACC Network maintenance 26 March 2023

Resolved Posted by Cody Hammock on March 23, 2023
Outage start Sunday, March 26, 2023 8 a.m.
Expected end Sunday, March 26, 2023 1:12 p.m.

Update: Maintenance was completed a 1:12 PM (CDT) yesterday Sunday, 26 March 2023.

Network maintenance will be carried out between 8:00 AM and 2:00 PM (CDT) on Sunday, 26 March 2023. Access to all TACC systems will be unavailable during this time, including CHI@TACC, KVM@TACC, and the Chameleon Portal. Instances will continue to run, but users will have no access to TACC services and systems until the upgrade is complete.

Please submit any questions you may have via the TACC User Portal.