CISL Daily Bulletin

The Daily Bulletin delivers news about CISL’s high-performance computing environment, training opportunities, scheduled maintenance, and other events of interest to the user community. To get the Daily Bulletin by email, use this link to subscribe.

All Cheyenne and Casper users invited to May 3 user group meeting

April 29, 2022

All users of the Cheyenne and Casper systems are invited to the NCAR HPC User Group (NHUG) monthly meeting from 9 to 10 a.m. MDT on Tuesday, May 3. To contribute to the agenda or submit questions for the next meeting, please visit Slido, where you can also upvote topics and questions submitted by your peers. NHUG meetings are structured to encourage you to ask questions and voice concerns and ...

Registration open: Free research computing facilitation workshop

April 28, 2022

Registration is open and free for the 2022 Summer Workshop on Research Computing Facilitation from June 27 through July 1 at the University of Oklahoma. Participants can attend on-site or via Zoom conferencing. The introductory workshop is intended for those who want to be more effective at helping researchers and educators use research cyberinfrastructure. The only prerequisite is having an in...

Reminder: Acknowledge NCAR and CISL support in your publications

April 27, 2022

Acknowledging the support of NCAR and CISL computing when you publish research results helps ensure continued support from the National Science Foundation and other sources of funding for future high-performance computing systems. It is also one of the requirements of receiving an allocation, as was noted in your award letter. The reporting requirements and recommended wording of acknowledgment...

No system downtimes for week of April 25-29

April 25, 2022

None planned for Cheyenne, Casper, GLADE, Campaign Storage, Quasar, Stratus, or JupyterHub.

Consulting Services staff attending May 2-6 Cray conference

April 22, 2022

Several members of CISL’s Consulting Services Group will participate in the annual Cray Users’ Group conference May 2-6 in preparation for delivery of the Derecho supercomputing system. Response times for support tickets submitted via NCAR's Research Computing help desk will likely be longer than usual during this period. We appreciate your patience and cooperation throughout the week.

HPC best practice: Load modules in your batch job scripts

April 22, 2022

Some Cheyenne users have recently reported some application slowdown when using the MPT library. These slowdowns were traced to using binaries that were compiled with mpt/2.22 in jobs that load the now-default mpt/2.25 MPI library. Incompatibilities between the remote-data transfer backends of each MPT version explain this substandard performance seen in certain workflows. This scenario illustr...