The Daily Bulletin

June 14, 2019

The Cheyenne module environment will undergo a number of significant changes following the system’s operating system update the week of June 24 - July 1. The planned changes are designed to better support multiple compiler and MPI configurations while providing a more robust and easier to maintain user environment.

The supported compiler and MPI versions will change when Cheyenne is restored to service. All versions of the Intel 2016 compiler will be removed. Versions 2017, 2018 (which will be the new default), and 2019 will remain available. The latest GNU 7, 8, and 9 compilers and PGI 19 will be installed as well.

MPT 2.19 will remain as Cheyenne’s default MPI and it will be available for all the above supported compilers. Intel MPI (module name impi) will be available for each of the supported Intel compilers and OpenMPI 3.1.4 will be available for the supported PGI and GNU compilers.

Further details on the module changes will be provided during the week of June 24.

June 14, 2019

Registration is open for Optimized Modern Fortran, a July 22 workshop led by Alessandro Fanfarillo, NCAR Research Applications Laboratory, 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. Monday, July 22

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. Lunch will be provided. Some travel funding is available. See the Optimized Modern Fortran Workshop web page for details and registration.

June 13, 2019

Dan Nagle, CISL Consulting Services Group, is soliciting NCAR Fortran programmers who would like some help updating older code. A SIParCS intern will work with the owner of the code under Dan’s supervision.

Examples sought include code that would benefit from having older features replaced with modern equivalents, card-format image source decks replaced by free form source form, and old versions of libraries updated to newer versions. Contact

June 11, 2019

CISL will begin phasing in enforcement of the purge policy for files in the /glade/p file space later this year. The project space was released to users on July 1, 2018, with a stated purge policy of 12 months from file create date. With that in place, files would have been purged as soon as July 1 of this year, but users now will have more time to adjust.

Once it is fully implemented, the project space purge policy will remove files 12 months after their last access date. On October 1, 2019, files will be purged if they have not been accessed in 18 months rather than 12 months. On the first Tuesday of each subsequent month, the retention period will be shortened by one month until the 12-month limit is fully implemented in April 2020.

The detailed schedule is provided below. Users will be notified well in advance of any changes to this schedule.

Retention period implementation dates

  • 18 months – October 1, 2019

  • 17 months – November 5, 2019

  • 16 months – December 3, 2019

  • 15 months – January 7, 2020

  • 14 months – February 4, 2020

  • 13 months – March 3, 2020

  • 12 months – April 7, 2020

CISL will deploy data management tools this summer that will include utilities to help users identify files that are nearing the purge limits.

June 7, 2019

Users are reminded that they can now log in directly to The new Casper login nodes are now permanently available to users,  subject to normal maintenance and outage activities, as an alternative way to access the Casper system, GLADE, and HPSS.  

Cheyenne’s login nodes will be unavailable throughout the system’s operating system upgrade outage, June 24 - July 1.  Logging in to will be the only way to access Casper, GLADE, and HPSS throughout the extended outage.