The Daily Bulletin

The 2018 annual conference of the UCAR Software Engineering Assembly (SEA), April 2-6 at the NCAR Center Green Campus in Boulder, will focus on Frontiers in Scientific Software. The conference will feature talks on a variety of topics, including data analysis, HPC, and cloud computing. The conference also offers a rich schedule of tutorials on topics ranging from deep learning to debugging and profiling HPC code, data analysis and visualization with Python, and probabilistic forecasting.

The SEA conference will offer symposia for the first time. The first is Overlapping Communication with Computation, for anyone interested in parallel programming. The second is Containers in HPC, an opportunity for container developers and system administrators to discuss challenges, issues, and features of deploying containers in a production HPC environment.

See the SEA Conference site for more information and registration details.

User sessions that consume excessive resources on the Cheyenne system’s login nodes will be killed automatically beginning Monday, February 26, to ensure an appropriate balance between user convenience and login node performance. Users whose sessions are killed will be notified by email.

Misuse of the login nodes can significantly slow response times and increase the difficulty of using the nodes for their main purposes, which include submitting batch jobs, editing scripts, and other processes that consume only modest resources. Some Cheyenne users have been running intense computing, processing, file transfer, and compilation jobs from the command line on those nodes.

Users are encouraged to compile large codes on the Cheyenne batch nodes or the Geyser or Caldera clusters, depending on where they want to run their programs. CISL provides the qcmd script for running CESM and WRF builds and other compiles as well as running compute jobs on batch nodes. Other resource-intensive work such as R and Python jobs that use large amounts of memory and/or processing power can be run efficiently in the Cheyenne “share” queue. Users can contact the Consulting Services Group for assistance.

For university researchers who are interested in or planning to apply for large-scale Cheyenne allocation opportunities, Dave Hart, NCAR's User Services manager, will host an online Q&A session at 2 p.m. MST on Thursday, March 1.

The session will include a brief overview of the NCAR/CISL supercomputing and storage systems, tips for writing successful allocation requests, and an opportunity to ask questions.

To register for the webcast, please use this form. The session will be recorded.

CISL is now accepting requests from university-based researchers for large-scale allocations for the 5.34-petaflops Cheyenne cluster; submissions are due March 26.

You should be aware that the CHAP is scrutinizing requests for disk and tape storage much more closely  because of the rapidly growing scale of the data generated by many university projects and constraints on the available storage within the CISL environment. Be sure to review the guidance on the updated instruction page before preparing your submission.

Large allocations on Cheyenne are those of more than 400,000 core-hours. CISL accepts requests from university researchers for these large-scale allocations every six months. For updated submission instructions and information regarding available resources, see the CISL HPC Allocations Panel (CHAP) page.

Please contact if you have any questions about this opportunity.