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News
Check Files Written to Lou During Unscheduled Outage on Monday, September 24
25 Sep, 2018
An unscheduled outage of the Lou mass storage system occurred on Monday, September 24, from approximately 3:30 p.m. - 7:30 p.m. (Pacific Time). The outage may have caused some file transfer issues if you were using any of the /s2* filesystems....
Electra Expanded with Additional Skylake Nodes
15 Aug, 2018
Electra has been expanded with the addition of 576 Intel Xeon Gold 6148 "Skylake" nodes, bringing the total number of Skylake nodes to 1,728. This expansion brings Electra's theoretical peak performance to 6.55 petaflops—approaching that of...
Automounting of Filesystems (Possible Action Needed)
07 Aug, 2018
Filesystems are now automatically mounted and unmounted as requested either by batch jobs or on demand, and are automatically unmounted after a period of inactivity (usually 30 minutes). This has been in effect for several months, and has reduced...
Follow-up Information on July 12-13 Electra Outage
13 Jul, 2018
A problem with Electra that began on July 12 at approximately 11:35 p.m. Pacific Time was resolved this morning, July 13. The problem was caused by an electrical panel fire in another building at NASA Ames, which in turn caused Electra's circuit...
Lou Data Analysis Nodes and Front-Ends lfe1 and lfe2 Are Available
14 Jun, 2018
The Lou data analysis nodes (ldans) and front-ends lfe1 and lfe2 are now available. The software patch has been applied to fix the SLES 12 filesystem issues. All SLES 12 ldans are available through PBS. lfe1 and lfe2 running SLES 12 are also...
Issue with Lou SLES 12 Filesystem
25 May, 2018
Due to a SLES 12 filesystem issue, all Lou SLES 12 systems are unavailable. We are working with our vendor to resolve this issue. In the meantime, please note: You can use the following Lou front-end nodes (LFEs), which have been downgraded to...
Training Materials for "Compiler Directive-based GPU Programming in C and Fortran" Now Available
30 Apr, 2018
Training materials are now available for the webinar "Compiler Directive-based GPU Programming in C and Fortran," which was held on Wednesday, April 25, 2018. You can download a PDF of the slides presented, and follow along with an accompanying...
Charging SBUs on Sandy Bridge GPU Nodes
04 Apr, 2018
Starting April 5, 2018, projects utilizing Sandy Bridge GPU nodes are charged at an SBU rate of 3.64 (twice the current Sandy Bridge rate). To utilize GPU nodes in PBS, specify the queue k40 with model type san_gpu. For users who may not be...
Update: LDANs Upgraded to SLES 12
22 Feb, 2018
The LDANs and one LFE system, lfe4, have been updated to SLES 12. However, upgrading lfe[1-3] has been postponed until an issue is resolved. Previous notification In advance of upgrading all Lou systems to SUSE Linux Enterprise Server 12 (SLES...
NEW! Monitor your PBS Jobs and SBUs from the Web
20 Feb, 2018
We are excited to announce the launch of the myNAS Portal, a central location where you can easily monitor all of your PBS jobs as well as allocation and usage information for all of your projects: https://portal.nas.nasa.gov/ Once you...
Brief NAS Network Outages on Feb. 1
31 Jan, 2018
On February 1, 2018, the NAS Network Team will perform network maintenance that will briefly affect all internet communications between remote systems and NAS systems. We expect there will be a few interruptions between 3:00–5:00 p.m., each lasting...
Electra Dedicated Time Completed
24 Jan, 2018
The Electra dedicated time has completed ahead of schedule, and the system is now available for use. The software update portion of the dedicated time will be rescheduled for a later date. Previous Notification Electra will be placed in...
License Server Upgraded, New MATLAB Version Available
19 Jan, 2018
The MATLAB license server has been upgraded. This upgrade is required in order to support MATLAB Version 2017b, which is available via modules. Both MATLAB 2016b and MATLAB 2017b will be available for approximately two weeks. On February 1,...
Lou Dedicated Time Has Completed
18 Jan, 2018
Lou is back online and available for use. Original Notification The Lou mass storage system will be placed in dedicated time for software patching from 11:30 a.m. to 3:30 p.m. (Pacific Time) on Thursday, January 18. The Lou front-end systems...
Action Recommended for Lou Home Directory Problem
12 Jan, 2018
Due to a problem on Lou that started yesterday afternoon, your Lou home directory link may have briefly been replaced with your Pleiades home directory. This means that any file transfer intended for Lou or any login to Lou might have gone to your...
PBS Scheduling Updated for Broadwell Jobs
21 Dec, 2017
Beginning on December 21, 2017, jobs requesting Broadwell nodes are now scheduled by PBS to run on either Pleiades or Electra, whichever system has enough free nodes. This applies to jobs that request Broadwell nodes using either model=bro or...
Update: Merope is Available
20 Dec, 2017
NAS system administrators have completed maintenance work on Merope. The system is back online and available for use. Original notification Merope will be placed in dedicated time for network changes and system maintenance on Wednesday,...
Update: Pleiades is Available
18 Dec, 2017
The /nobackupp9 filesystem is back online, and Pleiades is now available for all jobs. We apologize for any inconvenience. If you have any questions or concerns, please send email to support@nas.nasa.gov or call 1-800-331-8737 or 1-650-604-4444. ...
Brief NAS Network Outages on Dec. 27
15 Dec, 2017
On December 27, 2017, the NAS Network Team will perform network maintenance that will briefly affect all internet communications between remote systems and NAS systems. We expect there will be two interruptions between 5:00–7:00 p.m., each lasting...
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