Daily Bulletin Archive

January 6, 2020

No scheduled downtime: Cheyenne, Campaign Storage, GLADE.

Scheduled downtime for Casper login nodes from Jan 7th 12 p.m. - Jan 7th 2 p.m.

Users are advised to use the Cheyenne login nodes to access Casper during this time.

January 2, 2020

Individuals who use the ExtraView help ticketing system are now required to log in with a CIT (Active Directory) password rather than their UCAS (Kerberos) password. The change, which was announced recently in Notifier emails to users, took effect this morning.

Most CISL help desk support is now provided via the Staff Support and NCAR Research Computing support portals rather than ExtraView, which NETS, Infrastructure, and Asset Managers still use.

December 31, 2019

The Casper node upgrades described in this previous article have all been completed. New hardware required updates to network software on all Casper nodes. The updates required Open MPI 3.1.4 to be rebuilt and it is likely that older versions of OpenMPI will no longer work. CISL will test existing Open MPI modules in the coming weeks and remove any versions that no longer function correctly.

December 31, 2019

Registration is now open for an NCAR/CISL series of five one-day Fortran workshops beginning Tuesday, January 7. Dan Nagle, CISL Consulting Services Group software engineer and a member of the U.S. Fortran Standards Technical Committee, will provide the training at the Center Green Campus (CG1-3131) in Boulder.

Participants are encouraged to bring their own laptop computers with recent releases of gfortran, mpich, and opencoarrays. Each workshop will begin at 9 a.m. and end at 4 p.m. with an hour break at noon.

  • Scalar Fortran - Tuesday, Jan. 7: Scope and definition of names, how a Fortran program interacts with the o/s, intrinsic types, inquiry procedures.

  • Vector Fortran - Tuesday, Jan. 14: Arrays and array operations, rank of an array, inquiry procedures, array intrinsics.

  • Object-Oriented Fortran - Tuesday, Jan. 21: Derived types, operators, assignments, polymorphism.

  • Parallel Fortran - Tuesday, Jan. 28: Coarrays, solutions to several problems explained in detail.

  • Interoperability with C and handling Floating Point Data - Tuesday, Feb. 4: How to write and call libraries written in C  from Fortran; IEEE 754 floating point: rounding modes and exceptions.

Use this form to register to attend one or more workshops. The workshops will not be webcast or recorded.

December 30, 2019

Several Casper nodes were updated with new high-speed network hardware earlier this week. The new hardware required updates to the system’s network software on those nodes which includes all nodes with NVIDIA V100 GPUs.  The majority of Casper’s nodes have not yet been updated and their network is unchanged. The list of updated nodes is provided below. 

The updates required Open MPI 3.1.4 to be rebuilt and it is likely that older versions of OpenMPI will no longer work on the updated nodes.  Intel MPI usage should be unaffected by the network upgrade. However, until the remainder of Casper’s nodes are updated with the new network hardware, multi-node jobs with a mix of updated and non-updated nodes will likely perform slower than expected using any MPI library.  Further changes to Casper’s OpenMPI software stack are likely in the next several weeks. Please watch for related announcements in the Daily Bulletin.

Updated Casper nodes: casper08, casper09, casper23, casper24, casper25, casper27, casper28

December 30, 2019

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

December 26, 2019

CISL’s Consulting and Help Desk services will be available as usual over the holidays except for Christmas Day and New Year’s Day.

To report any critical system problems, call 303-497-2400 or select the “System issue” icon in the NCAR Research Computing support portal.

System issue icon
Support portal icon
December 26, 2019

Black Hills Energy Company plans to update the electrical power feed to the NCAR-Wyoming Supercomputing Center (NWSC) at approximately 9 a.m. MST on January 2. The work is expected to take 10 minutes or less to complete, and Cheyenne, Casper, GLADE, and HPSS users should not notice any interruptions. CISL staff will carefully follow the work and monitor all systems.

When the work is complete, NWSC will be the only facility on its primary power feed, which will significantly reduce the chances of future unplanned power interruptions.

December 24, 2019

Researchers who need help visualizing data to demonstrate the results of their scientific computing can request expert assistance and collaboration from CISL. This service is available to researchers who want help using specialized applications on data analysis and visualization resources that CISL manages.

CISL visualization staff have particular expertise in CISL-developed software such as VAPOR and NCL but are open to assisting with other applications. They have helped science teams produce numerous visualizations for conferences, publications, and scientific journals as well as science and broadcast news programs.

See Advanced visualization support to learn how to submit a request, what criteria must be met, and other details.

Hurricane Odile simulation
Hurricane Odile simulation, CISL Visualization Gallery










December 20, 2019

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