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.

Heads up for conda users: error message

June 4, 2021 Updated: June 7, 2021

Users creating conda environments may encounter an I/O bug on Cheyenne and Casper when using Python versions 3.8 or later, so CISL recommends specifying Python 3.7 unless a new version is needed. Users encountering the bug receive an error message saying “BlockingIOError: [Errno 11] Resource temporarily unavailable.” Specifying Python 3.7 or an earlier version will avoid the problem. When creat...

Image from a Hurricane Odile simulation in the CISL Visualization Gallery

Get expert help with visualizing research data

June 4, 2021

Researchers who need help visualizing data to demonstrate the results of their scientific computing can request expert assistance and collaboration from CISL. This service is available to researchers who want help using specialized applications on data analysis and visualization resources that CISL manages. CISL visualization staff have particular expertise in CISL-developed software such as VA...

PBS updates planned for Cheyenne and Casper

June 2, 2021

During the previously announced scheduled downtime of CISL’s HPC systems in July, the PBS Pro job scheduler on both Cheyenne and Casper will be upgraded to version 21 from the current version 18 (Cheyenne) and 20 (Casper). Updating both to version 21 will address some compatibility issues between the two clusters and is expected to improve performance and stability. When both systems are runnin...

No downtime scheduled for May 31-June 4

May 28, 2021 Updated: June 1, 2021

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

Part of a slide about using environment modules.

Introduction to NCAR HPC Systems: tutorial video and slides now online

May 25, 2021

Video and slides from the “Introduction to NCAR HPC Systems" tutorial are now available here in the CISL training library. The CISL Consulting Services Group presented the tutorial May 24 for new users of NCAR’s high-performance computing (HPC) and storage resources. The 60-minute tutorial covers basic usage and typical user workflows. Topics discussed include: • What HPC systems are available ...

Image from a Duo Mobile screen with text added saying “YubiKey? Get Duo!”

Some YubiKey users being asked to switch to mobile app for authentication

May 24, 2021

Users who log in with certain older YubiKey tokens to access NCAR/UCAR systems are encouraged to begin using Duo Mobile two-factor authentication. This does not apply to those who use the newer YubiKey 4 token. (See which YubiKey you have.) Users who already have a CIT password, which works with the Duo Mobile application, can refer to this documentation for how to download and activate the app...