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.

More Derecho hardware delivered after HPE factory trial

January 8, 2023 Updated: January 9, 2023

All of the CPU and GPU racks for NCAR’s new Derecho supercomputer have now been delivered to the NCAR-Wyoming Supercomputing Center (NWSC) in Cheyenne, Wyoming. Eight CPU racks and two coolant distribution units (CDUs) were delivered on December 6. Two more CPU racks, one GPU rack, an additional CDU, six storage racks, and two infrastructure racks arrived on January 4 following a factory trial....

No system downtimes for week of January 8 -13

January 6, 2023

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

HPC systems maintenance downtime January 17-20

January 3, 2023

NCAR’s HPC resources will be unavailable to users January 17-20 while CISL staff reconfigure the high-performance network to accommodate the Derecho supercomputer and perform urgent maintenance on Cheyenne’s cooling infrastructure. Progress will be communicated through Notifier emails during the week. The network maintenance will make all of the following resources temporarily unavailable durin...

All NCAR HPC users invited to January 3 user group meeting

January 3, 2023

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. MST on Tuesday, January 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...

No system downtimes for week of January 2 - 6

December 30, 2022 Updated: January 3, 2023

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

Where to run small, CPU-only jobs?

December 29, 2022

CISL recommends running small jobs that use only CPUs on the Casper cluster’s high-throughput computing (HTC) nodes. Casper has 64 HTC nodes specifically for running small batch jobs. It also has: • More shared resources than the Cheyenne share queue. • A far higher concurrent-use limit for CPU cores than Cheyenne: 468 vs. 36. • More available memory, plus NVMe swap for overflow. See Starting ...