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.

The updated timeline for delivery of the Derecho system.
Derecho delivery delayed until June 2022
December 7, 2021

Due to the continued worldwide shortfall in semiconductor supplies, the delivery of Derecho to NCAR will be further delayed by approximately six months. HPE’s new delivery date for Derecho is now mid-June 2022. Following Derecho’s delivery, HPE and CISL will begin the system’s installation and testing effort that will require approximately two months to complete. CISL will then begin formal acc...

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No system downtimes for week of December 6 - 10
December 6, 2021

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

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Software updates and future changes to defaults
December 2, 2021

New versions of many software packages – including netCDF, HDF5, NCO, CDO, GDAL, R, Singularity, and CMake – have been installed on both Cheyenne and Casper. In addition, new releases of MPT (version 2.25) and Arm Forge (version 21.1.1) have been installed, resolving known bugs relating to collective parallel IO and memory debugging, respectively. The parallel IO bug in MPT affects versions 2.2...

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Cheyenne will be unavailable December 28 - 30
December 1, 2021 Updated: December 2, 2021

The Cheyenne system’s compute nodes will be unavailable for running batch jobs for three days beginning the morning of Tuesday, December 28. The downtime is necessary to allow CISL staff to perform thorough testing of the recently installed power system components to support Derecho and other associated systems. Cheyenne’s login nodes and the Casper cluster are expected to be available througho...

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Python now supported via new conda module
November 29, 2021

To better support user-maintained Python environments and unify the user experience across terminal and JupyterHub sessions, CISL now provides Python support via the conda package manager. Cheyenne and Casper users – either new to conda or more experienced – can take advantage of our new conda module, which can be used to activate environments without any shell initialization. The module also p...

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No systems downtime for November 29-December 3
November 24, 2021 Updated: November 29, 2021

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

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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.