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.

No downtime scheduled for week of June 21-25
June 21, 2021

No downtime scheduled for Cheyenne, Casper, Campaign Storage, JupyterHub, HPSS, GLADE, Quasar, or Stratus.  

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Tutorial June 23: Xarray Part 2 of 2
June 21, 2021

The NCAR/UCAR virtual Xdev Seminar Series continues on Wednesday, June 23, with Xarray Part 2 of 2 at 1 p.m. MDT. For those who missed or would like to review Xarray Part 1, a recording is available here. See the Xdev blog for more information.

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Reminder: HPC systems downtime scheduled for July 26 through August 2
June 18, 2021

All high-performance computing (HPC) and data storage systems hosted at the NCAR-Wyoming Supercomputing Center will be unavailable during part or all of a scheduled maintenance downtime beginning early Monday morning, July 26, to allow CISL staff and contractors to update the facility’s power infrastructure in preparation for the arrival of the new Derecho system. The Cheyenne system’s login no...

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No downtime scheduled for week of June 14-18
June 14, 2021

No downtime scheduled for Cheyenne, Casper, Campaign Storage, JupyterHub, HPSS, GLADE, Quasar, or Stratus.  

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Opportunity for university researchers on NCAR’s Derecho supercomputer
June 14, 2021

Later this year, the National Center for Atmospheric Research (NCAR) will deploy Derecho, its next-generation HPC system, and NCAR will begin accepting proposals in July from university-led teams to participate in the Accelerated Scientific Discovery (ASD) program on the system. The ASD program will provide a unique opportunity for a small group of large-scale computational projects to have nea...

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Where to run small jobs that only use CPUs
June 9, 2021

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. Here’s an exa...

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This material is based upon work supported by the National Center for Atmospheric Research, a major facility sponsored by National Science Foundation and managed by the University Corporation for Atmospheric Research. Any opinions, findings and conclusions or recommendations expressed in this material do not necessarily reflect the views of the National Science Foundation.