Daily Bulletin Archive

February 13, 2019

NCAR’s  Data Transfer Services will be unavailable on Tuesday, February 12, starting at approximately 8 a.m. MST to allow CISL staff to install new networking components. These services are expected to be restored by 12:00 noon. The upgrades will include newer, faster 100 GbE hardware, which is expected to improve system performance significantly.

During the upgrade period the following data transfer services will not be available:

  • Globus transfers (active transfers will be paused, including those to and from NCAR Campaign Storage)

  • the HPSS queue

  • data access nodes

The Cheyenne and Casper clusters and the GLADE file system will remain available throughout the upgrade.


February 12, 2019

No scheduled downtime: Cheyenne, Casper, Campaign Storage and GLADE

HPSS: Tuesday 8 a.m. to noon (details)

February 11, 2019

This week is Love Your Data (LYD) Week, an international event coordinated by academic libraries and data archives with a theme this year of “data in everyday life.”

One focus for LYD Week 2019 is “open data.” LYD wants to help promote research data as being “the foundation of the scholarly record and crucial for advancing our knowledge of the world around us,” says NCAR Data Curation & Stewardship Coordinator Sophie Hou. Along those lines, Hou is highlighting the resources and services that the Digital Asset Services Hub (DASH) provides. The concept of data justice is another focus of the 2019 LYD event.


February 8, 2019

Batch script examples for users of the Casper cluster have been updated to use the long form of Slurm directives, and several new examples have been added. The long-form syntax is more clear than the single-letter identifiers that were provided previously.

See these documentation pages for new and updated script examples:

Some of the updated scripts include other revisions, such as removal of the module purge command. Contact cislhelp@ucar.edu if you need assistance or have questions about job scripts.


February 7, 2019

The next regular maintenance operations on NCAR’s HPC systems are scheduled for Tuesday, March 5. The Cheyenne and Casper clusters and the GLADE file system are expected to be unavailable from 7 a.m. until 6 p.m. MST but every effort will be made to restore the systems to users earlier if possible. More details on the outage will be published in the Daily Bulletin later this month.

February 6, 2019

NCAR’s Computational and Information Systems Laboratory (CISL) is seeking users’ input as part of the process of procuring a system to follow the Cheyenne cluster currently in production in the NCAR-Wyoming Supercomputing Center. Users’ input will help ensure procurement of a system that best meets the community’s future needs.

Users are asked to provide their input by completing this survey by March 1: User Survey for CISL's Next HPC Procurement. The survey includes questions about users’ experience with the Cheyenne environment and priorities for the next-generation environment, which is expected to be in production by mid-2021.

Two of the three sections of the survey can be completed in about 10 minutes. Users are welcome and encouraged to respond to some open-ended questions in the third section if they can take the time.


February 5, 2019

Additional CMIP6 data are now available on GLADE through the CMIP Analysis Platform, including monthly averages from the historical, 1pctC02, and piControl experiments. Data sets are available from the BCC, CNRM, IPSL, NASA, and NOAA modeling centers. Users can request the addition of other data sets as modeling centers publish them. NCAR's initial CMIP6 data products are expected to be available in the first quarter of this calendar year.

More information: CMIP Analysis Platform.


February 5, 2019

Cheyenne: Tuesday, noon to 1 p.m. (details)

No scheduled downtime: Casper, Campaign Storage, GLADE and HPSS

February 1, 2019

The Casper cluster will be expanded soon with the addition of two nodes. The new nodes are similar to the two existing Supermicro nodes with eight NVIDIA Tesla V100 GPUs. They will support ongoing and future machine learning and deep learning efforts.

The new nodes have been received and are being installed by CISL staff at the NCAR-Wyoming Supercomputing Center. When the installation is complete, CISL system administrators and software engineers will begin acceptance testing, which is expected to take several weeks. More details will be published when the new nodes are ready for users.


January 30, 2019

CISL system administrators will update the PBS workload management server at noon MST on Tuesday, February 5. The update is expected to take less than 60 minutes to complete. The new version of PBS, 18.2.3, provides performance and stability improvements and a number of important bug fixes.

Most PBS commands, including qstat, will not work during the update, and new Cheyenne job submissions will not be possible. Jobs that are executing when the maintenance begins will continue to run without interruption. Jobs that are queued for execution or in a hold state will remain in those states until PBS is returned to service. Access to Cheyenne’s login nodes will not be interrupted.