Daily Bulletin Archive

February 10, 2014

Researchers seeking high-performance computing and data storage systems to support extremely demanding, high-profile climate simulations can now submit proposals for Climate Simulation Laboratory (CSL) awards. The deadline for submitting project proposals is March 24, 2014. If you are currently using the CSL and wish to continue after May 30, 2014, please submit a renewal proposal and a progress report by the deadline.

The CSL represents CISL’s premier opportunity for researchers seeking high-performance computing and data storage systems to support large-scale climate simulations. Such simulations require high resolution, span many centuries of simulated time, encompass large numbers of ensembles, integrate new physics or models, or address national and international scientific priorities. Proposals must request a minimum of 10 million core-hours to be used on NCAR’s petascale Yellowstone system between June 1, 2014, and May 30, 2015.

With this call for proposals, the CSL is evolving into a focused effort to support NSF awardees in addressing scientific questions that require large-scale, long-running simulations of the Earth's climate system. Support from an NSF award (or awards) is required.

Projects selected for this round of CSL allocations will have access to Yellowstone, a 1.5-petaflops IBM iDataPlex cluster, and its associated storage, data analysis, and visualization resources. For more information about Yellowstone, see the CISL web site (www2.cisl.ucar.edu). Additional information about the CSL, the competitive review process, and how to submit a proposal can be found at www2.cisl.ucar.edu/csl.

If you have questions about this opportunity, please contact David Hart, User Services Manager, 303-497-1234, or email alloc@ucar.edu. Please share this information with any other colleagues who might be interested.

February 7, 2014

Students interested in attending the fifth International Summer School on HPC Challenges in Computational Sciences, June 1-6, 2014, in Budapest, Hungary, should apply by March 9, 2014. Graduate students and postdoctoral scholars from institutions in Europe, Canada, Japan, and the United States are eligible. Meals, housing, and travel expenses are paid for the selected participants.

Preference is given to applicants with parallel programming experience and a research plan that will benefit from the use of high performance computing systems. The summer school is sponsored by the European Union Seventh Framework Program’s Partnership for Advanced Computing in Europe Implementation Phase project (PRACE-3IP), the National Science Foundation’s Extreme Science and Engineering Discovery Environment (XSEDE) project, RIKEN Advanced Insti­tute for Computational Science (RIKEN AICS), and Compute/Calcul Canada. See http://www.prace-ri.eu/International-Summer-School-2014 for details.

February 3, 2014

CISL has recently deployed a pilot service to explore the features provided by the Globus Plus service, and we would like to invite existing CISL users to explore and evaluate the capabilities offered by this service.

Globus Plus adds data sharing features to the Globus data transfer service that is currently available to Yellowstone users and recommended by CISL for large-scale data transfers into and out of GLADE. (See http://www2.cisl.ucar.edu/docs/transfer/globus.)

Globus Plus extends the Globus paradigm by giving users the tools to share data (i.e., create shareable Globus endpoints), as well as define and manage access rights for external users and groups.

CISL expects that Globus Plus may prove useful for sharing large-scale files on a temporary basis, hosting data sets associated with publications, or providing a back-end for longer-term data-sharing services. Users of the pilot service should NOT begin long-term activities that require the sharing features.

From early users, we are seeking your feedback on the service, how it meets (or doesn’t meet) your data-sharing requirements, and its potential as a long-term offering from CISL. The pilot project will also give us an opportunity to develop policies associated with this service.

If you are interested in putting Globus Plus through its paces, please contact us via cislhelp@ucar.edu, and we will set you up with access and pointers to some preliminary documentation.

February 3, 2014

Yellowstone users are asked to review their procedures for submitting jobs in order to avoid some common errors, particularly when running interactive applications on Geyser and Caldera. The bsub command must include -Is rather than -Ip, for example, as in the following string:

bsub -Is -q queue_name -W 1:00 -n 1 -P project_code xterm

In addition, users should no longer be including the -XF option when submitting interactive jobs.

Early Geyser and Caldera documentation recommended the -Ip and -XF options, which are now known to cause technical issues when running interactively. The -Ip option, in particular, can cause users to be overcharged for jobs on those systems.

For examples of how to properly submit batch jobs and interactive jobs, see Running jobs see Running interactive applications.

February 3, 2014

CISL is asking users who have data stored on certain HPSS media called "B-tapes" to consider what can be deleted rather than migrated to new tape library media. The B-tapes are nearing their end of life, and removing unnecessary files will accelerate the migration, help users consolidate their data holdings, reduce their ongoing storage charges, and reduce overall data storage and management costs.

To determine if any of your data are stored on B-tapes, see HPSS B-tape files for documentation. Contact cislhelp@ucar.edu if you need help moving or deleting large numbers of files.

January 27, 2014

Web sites and applications hosted by the CISL Web Engineering Group will be offline for an estimated four hours beginning at 9 a.m. MT on Saturday, January 25, while an upgrade is done on a CISL file server. The CISL, NCAR, and UCAR web sites will be affected, as will the UCAR wiki, the UCAR JIRA, Subversion and Git services, and the CISL Help ticket system. For a short period during that outage, email services also will be unavailable, and some users may not be able to authenticate with their tokens to non-HPC systems.

HPC resources will not be affected, but requests for help emailed to cislhelp@ucar.edu may be delayed.

January 22, 2014

Yellowstone users can launch coarray programs, which are increasingly common in parallel processing, by following recently published CISL documentation on the subject. Part of the Fortran 2008 standard, coarrays are highly scalable, with a simple syntax that can make scalable codes easy to read. By enabling programmers to express parallelism more easily, they can help reduce future code maintenance costs. See Launching a coarray program for more information.

January 21, 2014

The CISL Consulting Services Group will present a one-hour workshop at 1:30 p.m. Friday, January 17, to introduce participants to using the Yellowstone, Geyser, and Caldera systems. Topics to be covered including logging in, working with environment modules, compiling code, and running batch jobs and interactive jobs.

Participants can attend in person at the VisLab in NCAR’S Mesa Lab in Boulder, or remotely by logging in to the online meeting, for which registration is required.

January 21, 2014

UCAR/NCAR, including the CISL Help Desk and consulting services, will be closed Monday, January 20 in observation of Martin Luther King day.

For problems please send email to cislhelp@ucar.edu and they will be addressed Tuesday, January 21.

For emergencies, you can still call x2400 (303-497-2400) to speak to CISL staff on duty.

January 15, 2014

No Scheduled Downtime: Yellowstone, Geyser_Caldera, HPSS, GLADE