Daily Bulletin Archive

January 2, 2014

CISL now creates snapshots of the GLADE home file space several times each day to enable users to retrieve deleted files or roll back to earlier versions of files they have revised. The home space is still backed up daily, but users can retrieve their own files from snapshots quickly rather than wait to have CISL restore backup copies.

See Recovering files from snapshots for details and contact cislhelp@ucar.edu if you have questions.

December 26, 2013

Command files used in LSF batch jobs can contain multiple independent MPI executables that require different processor counts. This is demonstrated in new example on CISL's "Platform LSF tips" page of how to submit Multiple Program, Multiple Data (MPMD) jobs using command files. The executables in this example require different numbers of tasks.

December 20, 2013

The NCAR-based SIParCS program (Summer Internships in Parallel Computational Science) offers significant hands-on R&D opportunities in high-performance computing (HPC) and related fields that use HPC for scientific discovery and modeling. This 11-week internship program is designed for graduate students and undergraduate students at U.S. universities who have completed their sophomore year by summer 2014. SIParCS embeds students in mentored research projects in computational science relevant to NCAR’s mission. The 2014 summer program runs from May 19 through August 1.

Application deadline: 15 January 2014
Contact: Kristin MooneyNCAR/CISL, 303-497-1288

December 18, 2013

To enable CISL to better secure and maintain the health and responsiveness of the Geyser and Caldera clusters, external SSH access to the Geyser and Caldera nodes will be turned off on December 17 at 8 a.m. No downtime is required for this change.

This will remove users' ability to log into these nodes directly from outside the Yellowstone environment. After the change, SSH attempts will result in the message, "Connection refused." However, SSH sessions active prior to the change should not be affected.

Users should continue to access the Geyser and Caldera clusters as described in CISL's documentation at http://www2.cisl.ucar.edu/resources/geyser_caldera.

December 13, 2013

No Scheduled Downtime: Yellowstone, Geyser_Caldera, HPSS, GLADE

December 5, 2013

No Scheduled Downtime: Yellowstone, Geyser_Caldera, HPSS, GLADE

December 3, 2013

CISL Help Desk will be unable to assist walk-ins on Wednesday, December 4.
The Help Desk team and HPC Consultants will be on duty, and users may continue to send
email to cislhelp@ucar.edu or call 303-497-2400. Your questions will be addressed as soon as possible.

December 2, 2013

The CISL Help Desk and Consulting Office will be closed Thursday and Friday, November 28 and 29.

Emergency calls to 303-497-2400 will be forwarded to NWSC NOC.

November 21, 2013

Using a command file when submitting an LSF batch job can help you run numerous independent tasks in parallel and make the most efficient use of Yellowstone compute nodes. If you have a serial data processing script, for example, and need to run many copies of it to process multiple data files, you can create a command file and job script that let you pack each node with the appropriate number of tasks and run them all in parallel. See CISL's Platform LSF tips for an example of how to use command files in batch jobs.

November 15, 2013

No Scheduled Downtime: Yellowstone, Geyser_Caldera, HPSS, GLADE