The Daily Bulletin

The CISL Help Desk and Consulting Office will be closing early today for walk-ins, and will be closed Thursday and Friday,  Nov. 26 -27 for the holiday weekend. For assistance with any urgent issues, call 303-497-2400 or email both of which are always monitored.

Holidays like Thanksgiving can be highly productive times for running compute jobs on the Yellowstone system. Due to many users taking a long weekend off, the system can experience lower than normal use. Users should consider taking advantage of these opportunities, including higher throughput for jobs in the standby queue, when they are in the office. 

A simple way to identify good opportunities is to check the CISL Resource Status reports on queue and login node activity.

Ensemble runs, data assimilation runs and other jobs on Yellowstone can generate tens or hundreds of thousands of output files, log files, and others over time. Such large numbers of files can be difficult to manage and remove from GLADE file spaces when they are no longer needed. Configuring jobs to place no more than 2,000 to 3,000 files in a single directory will make them easier to manage. 

See Removing large numbers of files for how to remove massive accumulations of files and this page for more best practices.

The Extreme Science and Engineering Discovery Environment (XSEDE) has announced its call for participation in XSEDE16, its fifth annual conference, which is scheduled for July 17 to 21, 2016, in Miami, Florida. The 2016 theme is DIVERSITY, BIG DATA, & SCIENCE AT SCALE: Enabling the Next-Generation of Science and Technology.

Papers, posters, tutorials and other submissions to the XSEDE16 technical program should emphasize results and lessons derived from collaborations with digital resource providers, including participating institutions such as NCAR, XSEDE service providers, and providers of other advanced computing resources. Work done on the Yellowstone supercomputing system is appropriate for consideration.

The conference will provide numerous opportunities for developers, applications teams, students, innovators, CIOs, IT staff, and policy makers from academia, government, industry and other organizations to engage in discussions that will assist them in significantly advancing their effective utilization of digital resources.

The XSEDE16 program offers multiple opportunities for undergraduate and graduate students, who are invited to submit technical papers and posters and to participate in other student-oriented activities. A limited number of student travel grants may be available.

See the XSEDE16 site for complete details.

Winds influence waves, but the reverse is also true, as shown in a colorful 3D VAPOR animation that was rendered from chunks of a Yellowstone simulation using a billion data points. A large eddy simulation, a technique first developed by NCAR scientists in the 1960s, was used to examine how waves affect the atmosphere. Read the story behind the two-minute animation and what it reveals in this UCAR AtmosNews Perspective article.