Daily Bulletin Archive

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  • Some modules for outdated software are no longer available, so affected scripts should be revised to specify the newer versions.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 4.4.1.1 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.

June 21, 2018

Major system upgrades will continue today, June 21, for the Geyser and Caldera systems. The clusters’ operating systems are being updated to CentOS 7, as announced previously. They are expected to be unavailable until 6 p.m. MDT tonight, but every effort will be made to restore them to service as soon as possible.

June 19, 2018

The CISL web site now includes a calendar that shows important events pertaining to NCAR’s HPC resources. The calendar shows when significant events related to the HPC systems are scheduled to occur, including downtimes, software releases, and new hardware installations.

Anyone can access the calendar on this web page. UCAR users can also add it directly into their Google work calendar by entering this link in the “Add a coworker’s calendar” field. Links to the calendar will also be added on other related CISL resources web pages.

June 18, 2018

Geyser and Caldera users should be preparing for the June 19 operating system update to CentOS 7 so their executables and job scripts are ready to run. Several nodes on these systems have already been updated to enable testing and porting of users’ applications and workflows to the CentOS 7 environment. Documentation for how to do this is available here.

As announced recently, users will need to recompile their executables to run on Geyser and Caldera under CentOS 7. Job scripts also may need to be updated to run in the new environment as version numbers of most software on the systems will be different. To facilitate the transition, CISL staff have installed new versions of compilers, MPI and NetCDF libraries, and scripting languages including MATLAB and IDL.

All of Geyser and Caldera will be upgraded to CentOS 7 on Tuesday, June 19. Users are encouraged to begin testing on the new operating system as soon as possible and to contact cislhelp@ucar.edu with any questions or problems. CISL will make every effort to resolve issues reported by the close of business on Friday, June 15. Issues reported after that may not be addressed until after the systems are returned to service.

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