Daily Bulletin Archive

May 4, 2018

CISL is asking for input from researchers in order to gauge their interest in Phase 6 of the Coupled Model Intercomparison Project (CMIP6) and planned use of CISL’s CMIP Analysis Platform.

NCAR data products are expected in mid-2018 and will be available to CMIP Analysis Platform users on the GLADE file system. As estimated time frames for availability of data from other modeling centers become known, CISL will publish that information for the community to help researchers make their plans. When other data sets are available, researchers who use the CMIP Analysis Platform will be able to submit requests to have the data sets they need added to GLADE.

Researchers who are or may be planning to use CMIP6 data are asked to respond to this survey by Friday, May 25, and are encouraged to share the survey with others.

May 2, 2018

Plans are under way to implement major system updates to Geyser, Caldera and the GLADE file system in June. The Geyser and Caldera clusters’ operating systems will be upgraded to CentOS 7, and GLADE will be upgraded to a new version of GPFS.

Users will need to recompile their executables to run on Geyser and Caldera. Job scripts may need to be updated to run in the CentOS 7 environment as version numbers of most software on the systems will be different.

CISL has begun building all of the required system software such as compilers, the module environment, and critical libraries including NetCDF, MATLAB and IDL. Once those tasks are completed later this month, several Geyser and Caldera CentOS 7 nodes will be made available for users to begin testing and rebuilding their applications.

GLADE will be upgraded to GPFS version 5.0, which will provide improved stability, performance and maintainability. This upgrade will not require users to make any changes.

Updates and more details, including target dates, will be posted in the Daily Bulletin as they become available.

May 1, 2018

The recommended way to set up your Cheyenne user environment–or in some cases, environments–is to load the desired modules after logging in or to create customized environments as described here.

Some users recently reported problems that resulted from loading environment modules with their personalized start files (.bashrc, .cshrc, .kshrc, .tcshrc, .login, .profile, and so on) instead of the recommended procedures.

As advised in our Personalizing start files documentation, Cheyenne users should not set environment modules in their start files by using commands such as:

  • module load nco

  • module load netcdf

Please contact the CISL Consulting Services Group if you have questions.

May 1, 2018

Batch jobs running on the Cheyenne systems sometimes fail when they create large stdout or stderr files that overflow the spool directory on the first compute node used. Failures from this condition are more likely with MPI jobs. To avoid the problem, CISL recommends redirecting job output to a file as described in this newly updated documentation regarding job scripts.

April 27, 2018

No downtime: Cheyenne, GLADE, Geyser_Caldera and HPSS

April 20, 2018

Cheyenne system administrators will perform preventative maintenance procedures on the PBS job scheduler today, Tuesday, April 24, beginning at noon MDT. The maintenance is expected to take approximately one hour to complete.

Most PBS commands will not work during the maintenance outage, including qstat and qsub, and new job submissions will not be possible.

No batch jobs are expected to be lost as a result of the maintenance. 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.

Users will be notified when PBS is returned to service.

April 20, 2018

Cheyenne system administrators will perform preventative maintenance procedures on the PBS job scheduler tomorrow, Tuesday, April 24, beginning at noon MDT. The maintenance is expected to take approximately one hour to complete.

Most PBS commands will not work during the maintenance outage, including qstat and qsub, and new job submissions will not be possible.

No batch jobs are expected to be lost as a result of the maintenance. 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.

Users will be notified when PBS is returned to service.

April 16, 2018

CISL will reactivate the purge policy for the GLADE scratch file space today, April 17. The purge policy was turned off during last month’s problems with the /glade/p file space to provide users an alternative storage option.

The purge policy data-retention limit is currently set at 60 days and uses two time and date factors: a file’s creation date and its last access date.

Files that were created more than 60 days ago and have not been accessed for more than 60 days will be deleted. CISL monitors scratch space usage carefully and reserves the right to decrease the 60-day limit as usage increases. Users will be informed of any change to the purge policy.

 

GLADE scratch space is for temporary, short-term use and not intended for long-term storage needs.

April 13, 2018

HPSS will be down on Tuesday, April 17 from 7:00 am to 3:00 pm for system testing.

 No downtime: Cheyenne, GLADE, Geyser_Caldera

April 11, 2018

The location of the Research Data Archive (RDA) on NCAR’s GLADE file system has changed.  NCAR users are advised to access RDA data from the new production location at: /glade2/collections/rda/data.

Note that the previous location of RDA data, /glade/p/rda/data, has been moved to /glade/p/rda/data_old but is no longer being maintained and will be purged later this year.

Please contact rdahelp@ucar.edu with any questions or concerns.

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