Daily Bulletin Archive

April 7, 2014

The UCAR Software Engineering Assembly's 2014 technical conference is scheduled for April 7 to 11. Tutorial topics include debugging, scientific programming paradigms, test-driven development, Software Carpentry, and parallel programming.
See https://sea.ucar.edu/conference/2014 for details.

April 7, 2014

NCL version 6.2.0 is now the default version on yellowstone, which you can load with:

           module load ncl

For full details on this release, see:


Some issues to be aware of that may cause some backwards-incompatibility:

- Raster contouring now supports transparency.

If you are drawing raster contours over maps and have missing values in your data, you may now see gray-filled missing value areas instead of white-filled areas. This is not a bug.

This is because the missing value areas are now transparent, and hence any gray-filled land that was underneath the missing value areas will now be visible. If this is undesired, set:

res@cnMissingValFillColor = “white”

- Double-precision variables will now show more digits when using "print" and other printing functions. print. For example, "-62.02990341186519" instead of "62.0299".

If you need to use the previous version of NCL, you can load it with:

        module load ncl/6.1.2

Email any questions or concerns about this release to Dave Brown (dbrown@ucar.edu) and Mary Haley (haley@ucar.edu).

March 31, 2014

Early bird registration ends March 30 for the UCAR Software Engineering Assembly's 2014 technical conference, which is scheduled for April 7 to 11. The conference is for software engineers and computational scientists working at UCAR/NCAR and other supercomputing centers, institutions, and universities developing software focused on scientific disciplines. See the SEA Software Engineering Conference web page for program and registration details. Tutorial topics include debugging, scientific programming paradigms, test-driven development, Software Carpentry, and parallel programming.

March 31, 2014

To ensure that Yellowstone is running the most current and supported versions of systems software, CISL staff are preparing for an upgrade of the Yellowstone environment to Red Hat Enterprise Linux version 6.4 from the current version 6.2. The upgrade process will start April 7 and may require an outage of up to seven days before the user environment is fully restored. Geyser and Caldera will also be unavailable while those clusters are upgraded. HPSS will remain up during the upgrade.

The extensive set of upgrades will include system software, GLADE servers, and Mellanox InfiniBand switch firmware, and most CISL-installed software will need to be recompiled or re-installed. CISL consultants will also take the opportunity to remove older software versions to simplify the standard modules environment. Users with needs for older software versions will be supported outside the default environment.

We will make every effort to complete this upgrade ahead of schedule and return services to users as quickly as possible.

March 27, 2014

A half-hour webinar for scientists who are interested in visualizing 3D data sets will use Hurricane Katrina data to demonstrate the use of CISL's VAPOR visualization and analysis platform. The webinar is scheduled for 10 a.m. MDT on Wednesday, March 26. Participants can observe the demonstration or use VAPOR 2.3 and sample data to follow along on a walk-through of the Hurricane Katrina Tutorial. Two computer monitors are recommended for those who plan to follow along with the walk-through — one for the webinar and one to display VAPOR. To register for the webinar, go to VAPOR: An Introduction to Visualizing 3D Model Data.

March 25, 2014

CISL has two upcoming deadlines for large-scale allocation requests. Climate Simulation Laboratory requests are due March 24, and large University requests are due April 7.

The Climate Simulation Laboratory (CSL) is CISL’s premier opportunity for researchers seeking high-performance computing and data storage systems to support extremely demanding, high-profile climate simulations. These long-running simulations typically require millions of core-hours to complete and usually produce many terabytes of model output that must be stored for analysis and comparison with other simulations and with observations. See http://www2.cisl.ucar.edu/csl for details.

CISL accepts requests for large University allocations every six months. Check the allocations site (http://www2.cisl.ucar.edu/chap) for submission instructions and information regarding available resources. Large allocations on Yellowstone are those for more than 200,000 core-hours.

Please contact cislhelp@ucar.edu if you have any questions about the two opportunities or which may be a better fit for your planned computational work.

March 21, 2014

HPSS: Downtime Tuesday, March 18, 7:00am - 9:00am

No Scheduled Downtime: Yellowstone, Geyser_Caldera, GLADE

March 14, 2014

Networking equipment supporting NCAR's wide-area network access via the Front Range GigaPOP (FRGP) will be physically moved on Saturday, March 15. Network connectivity to NCAR facilities in Boulder or Cheyenne should not be affected by the move, but there is a chance of minor congestion on some links.

CISL users will likely not notice any network service impacts; however, users are advised not to plan any very large-scale data transfers that Saturday.

March 14, 2014

The new data-sharing service that was recently in pilot testing is now in production. It enables Yellowstone users to share files with colleagues and others who do not have NCAR user accounts. Through the new Globus Plus service, users who have access to NCAR storage resources such as GLADE and HPSS can copy files to shareable Globus endpoints. Individuals with whom files are shared do not need NCAR user accounts or tokens to retrieve the shared data; they only need to have Globus accounts.

Globus Plus is an extension of the Globus file-transfer system, which CISL recommends for making large-scale data transfers into and out of GLADE.

If you are interested in using the data-sharing service, please contact us via cislhelp@ucar.edu to request access.

March 11, 2014

NCAR's Computational and Information Systems Laboratory (CISL) invites NSF-supported university researchers in the atmospheric, oceanic, and related sciences to submit large allocation requests for the Yellowstone system by April 7, 2014. All requesters are strongly encouraged to review the instructions at https://www2.cisl.ucar.edu/chap before preparing their submissions.

For the Yellowstone system, computational requests greater than 200,000 core-hours are considered "large." Smaller requests for up to 200,000 core-hours are accepted any time and are typically reviewed within two business days; visit the allocations web page for details.

The large requests will be reviewed by the CISL High-performance computing Allocations Panel (CHAP), and there must be a direct linkage between the researcher's NSF award and the computational research being proposed. Visit http://www2.cisl.ucar.edu/docs/allocations/university for more university allocation instructions and opportunities.

Note that CISL is also accepting submissions for Climate Simulation Laboratory (CSL) projects (www2.cisl.ucar.edu/csl) with a March 24 deadline. Both opportunities are open to eligible university researchers, but in general interested groups should apply to only one opportunity. Contact alloc@ucar.edu if you have questions regarding the two opportunities.

Allocations will be made on Yellowstone, NCAR's 1.5-petaflops IBM iDataPlex system, the data analysis and visualization clusters (Geyser and Caldera), the 11-PB GLADE disk resource, and the HPSS archive. See https://www2.cisl.ucar.edu/resources/yellowstone for more system details.

Questions may be addressed to: David Hart, User Services Manager, 303-497-1234, alloc@ucar.edu