Daily Bulletin Archive

July 6, 2018

The Cheyenne, Geyser, and Caldera clusters and the GLADE file system will be unavailable on Tuesday, July 10, starting at approximately 7 a.m. MDT to allow CISL staff to update key system software components. The downtime is expected to last until approximately 6 p.m. but every effort will be made to return the system to service as soon as possible. The updates include installing the latest version of the PBS scheduler, changes to /glade/p/ described in today’s Daily Bulletin, and completing GLADE’s transition to GPFS 5.

A system reservation will prevent batch jobs from executing after 7 a.m. All batch queues will be suspended and the cluster’s login nodes will be unavailable throughout the update period. All batch jobs and interactive processes that are still executing when the outage begins will be killed.

CISL will inform users through the Notifier service when all of the systems are restored.

June 29, 2018

No downtime: Cheyenne, GLADE, Geyser_Caldera and HPSS

June 29, 2018

The CISL Consulting Services Group is planning a 30- to 45-minute tutorial for 10 a.m. MDT on Monday, July 9, to demonstrate how to use Globus to move data between the Cheyenne/GLADE environment, external endpoints, and the new Campaign Storage file system that will become available soon. Registration forms and more information about the tutorial will be available this week.

June 29, 2018

CISL’s documentation for Geyser and Caldera users has been revised to reflect the recent updating of those systems to CentOS 7. Key differences  include the following:

  • Procedures for loading Python modules were changed to match the procedures used on Cheyenne.

  • Earlier example scripts included a source command for initializing the Slurm environment. That command is no longer needed and should be removed from scripts used in the CentOS 7 environment. (Updated examples are on this page.)

  • The first line of example bash scripts for Slurm jobs has been revised to include the -l option, which now is required to initialize the environment.

  • Some modules for outdated software are no longer available, so affected scripts should be revised to specify the newer versions.

  • The openmpi-slurm module has been renamed to openmpi.

June 28, 2018

Nearly all of the researchers who responded to the recent CISL survey about their CMIP6 plans expressed strong interest in using NCAR facilities such as the CMIP Analysis Platform to support their work. Of the 38 respondents, 95% said they were likely to very likely to use those resources.

Researchers were also asked to identify which DECK and CMIP6 historical simulations they anticipate needing for their work. The following shows what percentage of respondents selected each simulation:

  • 100% - Historical simulation using CMIP6 forcings (1850-2014)

  • 68.4% - Pre-industrial control simulation

  • 55.3% - AMIP simulation (~1979-2014)

  • 47.4% - 1%/yr CO2 increase

  • 36.8% - Abrupt 4xCO2 run

The survey also asked researchers to indicate which CMIP-endorsed MIPs they anticipate using. The most frequently selected were:

  • 36.8% - Cordex

  • 36.8% - HighResMIP

  • 28.9% - CMIP Coupled Climate Carbon Cycle MIP

  • 28.9% - RFMIP Radiative Forcing MIP

  • 28.9% - Scenario MIP

The results will help CISL prioritize the addition of CMIP6 data sets to the CMIP Analysis Platform. NCAR CMIP6 data products are expected to be available this summer. Estimated time frames for data from other modeling centers will be published when they become available.

June 26, 2018

Does your institution have lots of researchers and educators who want to use advanced computing but need some help learning how? Consider attending the free ACI-REF Virtual Residency Summer Workshop on Research Computing Facilitation to learn to be more effective at helping researchers and educators use Research Cyberinfrastructure (CI).

This intermediate-level workshop is August 5-10 on the University of Oklahoma Norman campus. Participants can attend either in person or remotely by videoconference. You do not need to have completed an introductory workshop to attend. Use this link to register or contact hneeman@ou.edu for additional information.

Virtual Residency workshops have served 188 institutions in 51 U.S. states and territories and five other countries.

June 26, 2018

CISL is planning to change the default versions of the following software modules on Cheyenne on July 2:

  •  NetCDF from version to 4.6.1
  •  Python from version 2.7.13 to 2.7.14

We recommend that you test your work with the new versions before the changeover date, and report any issues or concerns to cislhelp@ucar.edu. Alternatively, you can specify your own set of default modules using these documented procedures.


June 25, 2018

PEARC18 is coming up soon, with a lineup of distinguished plenary speakers, but there’s still time to register and book your lodging at the special conference rate. Among the many great reasons to attend the 2018 Practice & Experience in Advanced Research Computing conference, July 22-26 in Pittsburgh, are these hot topics:

  • Bytes and BTUs: Lessons Learned from the World’s Most Energy Efficient Data Center (July 24, 8 a.m.) (Steve Hammond, National Renewable Energy Center)

  • Towards a National Cyberinfrastructure Ecosystem: The Role of Software Institutes (July 24, 8 a.m.) (Vipin Chaudhary, National Science Foundation)

  • Neuroscience and Advanced Computing (July 25, 8am) (Gregory Farber, National Institute of Mental Health)

  • Using Advanced Computing to Recover Black Women’s Lost History (July 25, 8 a.m.) (Ruby Mendenhall, University of Illinois at Urbana-Champaign)

  • Town Hall: NSF Office of Advanced Cyberinfrastructure (July 25, 1:30 p.m.) (Manish Parashar, National Science Foundation, OAC)

  • Hacking Academia/Trusted CI Panel Discussion (July 26, 8 a.m.) (Anita Nikolich, Illinois Institute of Technology)

  • Championing Research Computing (July 26, 10:30 a.m.) (Campus Champions Fellows)

See the PEARC18 site for details.

June 25, 2018

No downtime: Cheyenne, GLADE, Geyser_Caldera and HPSS

June 22, 2018

Registration is now open for an NCAR/CISL series of four one-day workshops on Modern Fortran beginning Tuesday, July 3. Dan Nagle, CISL Consulting Services Group software engineer and a member of the U.S. Fortran Standards Technical Committee, will provide the training at the NCAR Mesa Lab’s Fleischmann Building (Walter Orr Roberts room) in Boulder.

Participants are encouraged to bring their own laptop computers with recent releases of gfortran, mpich, and opencoarrays. Each workshop will begin at 9 a.m. and end at 4 p.m. with an hour break at noon.

  • Scalar Fortran - Tuesday, July 3: Scope, definition, scalar declarations and usage, and interacting with the processor.
  • Vector Fortran - Tuesday, July 17: Arrays, storage order, elemental operations, and array intrinsics.

  • Object-Oriented Fortran - Tuesday, July 24: Derived types, defined operations, defined assignment, and inheritance.

  • Parallel Fortran - Tuesday, July 31: Coarray concepts, declarations, and usage; synchronization and treating failed images.

Use this form to register to attend one or more workshops. The workshops will not be webcast or recorded.