Daily Bulletin Archive

January 3, 2019

Two NCAR/CISL tutorials are coming up soon and there’s still time to register and attend either in person or online. Follow these links to learn more about what’s covered and to sign up:

December 31, 2018

Correction: Casper is expected to remain available to users throughout the day except for a brief interruption to job submissions sometime during the 10 a.m. to 6 p.m. maintenance window announced earlier today.

No downtime: Cheyenne, Casper, GLADE and HPSS   

December 31, 2018

The CISL Help Desk and Consulting Office will close at 2:00 pm Monday, December 31 for the New Years holiday. For assistance with any urgent issues, call 303-497-2400 or email cislhelp@ucar.edu both of which are always monitored.


December 28, 2018

The CISL User Services Section will present an in-person and online tutorial at 9 a.m. MST on Monday, January 14, for new users of NCAR’s Cheyenne high-performance computing system. The 60-minute tutorial will cover basic usage and typical user workflows. Topics will include:

  • The Cheyenne computing environment

  • Accessing software, including compilers and MPI libraries

  • Submitting batch jobs using the PBS scheduler

Register to attend in person – in the Damon Conference Room at NCAR’s Mesa Lab in Boulder – or attend online by selecting one of these links:

December 27, 2018

No downtime: Cheyenne, GLADE, Geyser_Caldera, HPSS and Casper


December 21, 2018

The Fortran language has evolved a lot since its first version in 1957 in order to take advantage of new computing systems. Now, the use of vector instructions (or SIMD) can result in substantial performance improvements on current and future architectures. Alessandro Fanfarillo, NCAR Research Applications Laboratory, will lead a workshop January 29 to help participants make their Fortran codes run more efficiently through vectorization and other techniques.

When: 9 a.m. to noon, 1 to 3 p.m. Tuesday, January 29

Where: Room 3131, Center Green campus (CG1), Boulder

Participants will get a detailed, practical explanation of how to obtain high performance from modern Fortran codes, with a particular focus on how to exploit the hardware instructions provided by modern processors. Prerequisite: Basic knowledge of Fortran 90 constructs, such as array syntax and allocation, recursion, modules, and intrinsic, elemental and pure functions. Participants are encouraged to bring their own codes and laptop computers.

Register here to attend.

December 21, 2018

Some CMIP6 data are now available on GLADE through the CMIP Analysis Platform, and users can request the addition of other data sets as modeling centers publish them. NCAR's initial CMIP6 data products are expected to be available in the first quarter of calendar year 2019.

More information: CMIP Analysis Platform.

December 20, 2018
A brief outage of the Slurm scheduler will occur at noon today to improve the prioritization of job resource requests on the data analysis and visualization nodes. The work should last up to one hour. During this time, Slurm scheduler commands may be unavailable and new jobs may not be submitted. Pending and running jobs should be unaffected. Users will be notified when the work is complete.
December 20, 2018

The 2019 Improving Scientific Software conference organized by the UCAR Software Engineering Assembly (SEA) will take place April 8 to 12 in Boulder, Colorado. The SEA is soliciting talks and tutorials about any aspects of scientific software, but particularly on the following topics:

  • How to improve scientific software

  • Utilizing modern HPC architectures for scientific software

  • Utilizing machine learning techniques in scientific software

  • Utilizing software engineering practices to improve scientific software

  • Utilizing containers and cloud for HPC

The deadline for submitting abstracts is January 13. Students can apply for travel assistance until February 9. See the conference site for more details.

December 19, 2018

The Geyser and Caldera clusters will be decommissioned on December 31, as announced previously. Users who have not already done so should migrate their data analysis and visualization (DAV) workflows to the new Casper cluster. See the following links for information: