Daily Bulletin Archive

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

January 9, 2014

New utilities in Yellowstone users' default environment provide information on queue activity and backfill windows. Executing the bsumm command shows how many jobs are running or pending in the Yellowstone, Geyser, and Caldera queues, and how many nodes are in use. The bfill command identifies backfill windows as described on the CISL Running jobs documentation page.

Contact cislhelp@ucar.edu if you have questions about using these commands and how they can help you spot opportunities to get compute jobs done quickly.

January 8, 2014

HPSS:   Downtime Tuesday, January 7 , 7:00am. - 9:00am.

No Scheduled Downtime: Yellowstone, Geyser_Caldera, GLADE

January 3, 2014

No Scheduled Downtime: Yellowstone, HPSS, Geyser_Caldera, GLADE