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News
January 7: Downtime for All Systems for Patching
30 Dec, 2025
All compute systems at NAS will be unavailable Wednesday, January 7, 2026 from 5:00 a.m. to 11:59 p.m. (Pacific Time) to facilitate system patching. The following systems will be affected: Jobs on Aitken, Electra, Endeavour, Lou, and Cabeus A100...
December 8: Suspend/Resume on All Systems for Patching
01 Dec, 2025
There will be a suspend/resume for Aitken, Pleiades, Electra, Endeavour, Cabeus, and Lou systems, on Monday, December 8, from 5:00 a.m. to 11:59 p.m. (Pacific Time) to facilitate system patching. The following services will be affected: ...
Suspend/Resume, Dedicated Time on September 24
12 Sep, 2025
There will be a suspend/resume for Pleiades, Electra, Endeavour, Cabeus, and Lou systems, and dedicated time Aitken nodes on Wednesday, September 24, from 5:00 a.m. to 11:59 p.m. (Pacific Time) to facilitate system patching. The following...
Dedicated Time for Electra and Cabeus Grace Hopper Nodes, Sept. 3
19 Aug, 2025
The Electra supercomputer and Cabeus Grace Hopper nodes will be taken offline on Wednesday, September 3 from 7:00 a.m. to 7:00 p.m. (Pacific Time) to facilitate InfiniBand network infrastructure changes. The following services will be affected: ...
Suspend/Resume, Dedicated Time on August 27
15 Aug, 2025
There will be a suspend/resume for Pleiades, Electra, Endeavour, Cabeus, and Aitken Cascade Lake nodes, and dedicated time for Lou and Aitken Rome nodes on Wednesday, August 27, from 8:00 a.m. to 11:59 p.m. (Pacific Time) to facilitate system...
New SSH Session Inactivity Timeouts Starting July 29
14 Jul, 2025
Beginning July 29, 2025, HECC enclave front-end systems will enforce agency mandated session timeout restrictions: SSH connections to front-end sytems will disconnect after 15 minutes of inactivity. Every shell is subject to a 15-minute idle...
Dedicated Time for All Systems Scheduled for July 23-24
07 Jul, 2025
A 24-hour dedicated time for all systems will occur from 6:00 a.m. (Pacific Time) Wednesday, July 23 to 6:00 a.m. Thursday, July 24 to facilitate system patching and InfiniBand infrastructure changes. The following services will be affected: ...
Suspend/Resume, Dedicated Time for All NAS Systems, June 25
16 Jun, 2025
There will be a suspend/resume for Pleiades, Electra, Endeavour, and Cabeus Grace Hopper nodes, and dedicated time for Lou and Aitken and Cabeus A100/V100 nodes, on Wednesday, June 25, from 6:00 a.m. to Thursday, June 26 6:00 a.m. (Pacific Time) to...
Requests for Computing Time for the 2026 Operational Year Due July 20
16 Jun, 2025
All NASA mission directorates are currently gathering requests for High-End Computing Capability time on resources at the NASA Advanced Supercomputing (NAS) facility for awards to begin October 1, 2025. The deadline for submitting requests is July...
New Update: Suspend/Resume on June 4
02 Jun, 2025
This notice has been revised to reflect changes since the previous update: Jobs will not be drained prior to the dedicated time; all jobs will be suspended at the beginning of the outage period and resumed once the work is complete. The outage...
Suspend/Resume for All NAS Systems, April 30
07 Apr, 2025
To facilitate system patching and maintenance, a suspend/resume is scheduled for April 30, 2025 8:00 a.m. to 11:59 p.m. (Pacific Time). Visit the Knowledge Base to learn how to manage your jobs before dedicated time. The following systems will be...
Update: Cabeus Grace Hopper Nodes
17 Mar, 2025
The Initial Release Period for the Cabeus Grace Hopper nodes (gra_h100) ended on March 17, 2025, at 12:00 p.m. (Pacific Time). Any jobs that were running on the nodes at that time are not being charged. Any jobs that were queued in the alpha_test...
NASA Next-Gen GPU Onboarding Bootcamp with NVIDIA: April 23
14 Mar, 2025
A NAS user training, “NASA Next-Gen GPU Onboarding Bootcamp,” will take place on Wednesday, April 23, 2025. This one-day training will provide a Grace Hopper-focused system introduction & profiling event with NVIDIA. It’s open to all current...
Urgent Downtime for Lou and LDANs Wed., March 19
11 Mar, 2025
Lou will be taken offline on Wednesday, March 19 from 12:00 p.m. to 8:00 pm. (Pacific Time) for an OS upgrade. During this time, the Lou front ends (LFEs) and Lou Data Analysis Nodes (LDANs) will be unavailable. File transfers to/from Lou...
Access to Some Intel Compilers and VTune Versions Will Be Restricted on March 17
07 Mar, 2025
As part of our continual updates to supported system modules, we will move the following Intel compilers and VTune modulefiles into a restricted zone on Monday, March 17, 2025. Access to these restricted modules will be limited via an access...
Suspend/Resume for All NAS Systems, March 12
21 Feb, 2025
A suspend/resume will occur on March 12, 2025 for all HECC systems from 8:00 a.m. to 11:59 p.m. (Pacific Time) to facilitate patching and maintenance. Visit the Knowledge Base to learn how to manage your jobs before dedicated time. The following...
Urgent Downtime for LFEs and LDANs Feb. 27
20 Feb, 2025
The Lou Front-Ends (LFEs) and Lou Data Analysis Nodes (LDANs) need to be rebooted on February 27th from 7:00-8:00 p.m. (Pacific Time) in order to implement a security update. The LFEs and LDANs will be unavailable during this one-hour window and...
Update: /nobackup27 is Now Available
03 Feb, 2025
The /nobackupp27 filesystem is now available. However, there is the possibility that some users may experience MPT startup failures if the system is too slow to mount on some nodes. For troubleshooting information, see MPT Startup Failures and...
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