Daily Bulletin Archive

July 8, 2020

No scheduled downtime: Cheyenne, Casper, GLADE, Campaign Store, Object Store, or HPSS

June 30, 2020

Accidentally deleting data can ruin your whole day and then some. One key to avoiding this is to double- or triple-check that you have not specified the same files as both source and destination before you execute a transfer.

When using the Globus web interface to transfer files, for example, activate the sync option in the Transfer & Sync Options menu. Sync can be set to allow a file transfer only if the file does not exist on the destination, if there’s a difference in checksum or file size, or if the source copy is newer than the destination copy. If you use the Globus command line interface, include the --verify-checksum and --sync-level checksum options when executing a transfer command.

Review this documentation for additional cautions and instructions for using Globus to transfer files.

Globus sync settings
Sync settings in Globus web interface

 

June 26, 2020

No scheduled downtime: Cheyenne, Casper, GLADE, Campaign Store, Object Store, or HPSS

June 25, 2020

Video and slides from the June 24 tutorial "Casper Basics for New Users" are now available here in the CISL training library. The 30-minute presentation by Shiquan Su of the CISL Consulting Services Group provides a basic understanding of how to run jobs on the Casper cluster. Casper is a heterogeneous system of specialized data analysis and visualization resources and large-memory, multi-GPU nodes.

June 22, 2020

Users are reminded that the High Performance Storage System (HPSS) will reach its end of life and be decommissioned in 2021. HPSS file owners and project leads have been contacted and instructed on how to access lists of their files. The lists are updated weekly.

For reference, the lists can be found here:

  • /glade/work/csgteam/hpssreports/current/byusers/<userID>.data.gz
  • /glade/work/csgteam/hpssreports/current/byprojects/<projectID>.data.gz

Writing HPSS files is no longer possible, but users can perform most common metadata operations on their HPSS holdings, including deleting, renaming, and moving files. Those who have not already done so should begin moving their data to alternative storage systems and deleting files that are no longer needed.

Documentation and training are available on recommended processes for identifying and organizing HPSS holdings; copying files that need to be preserved to another storage resource; and deleting files that are no longer needed. 

Please contact CISL for advice on individual workflows and storage options.

June 19, 2020

No scheduled downtime: Cheyenne, Casper, GLADE, Campaign Store, Object Store, or HPSS

June 18, 2020

Acknowledging the support of NCAR and CISL computing when you publish research results helps ensure continued support from the National Science Foundation and other sources of funding for future high-performance computing (HPC) systems. It is also one of the requirements of receiving an allocation, as was noted in your award letter.

The reporting requirements and recommended wording of acknowledgments can be found on this CISL web page. The content of citations and acknowledgments varies depending on the type of allocation that was awarded.

June 15, 2020

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

June 15, 2020

CISL will present an online tutorial at 10 a.m. MDT on Wednesday, June 24, for users who want to know more about the Casper data analysis and visualization cluster. There are no prerequisites.

A 30-minute presentation by Shiquan Su of the CISL Consulting Services Group will provide attendees with a basic understanding of how to run jobs on the Casper cluster. The presentation will be followed by additional time for questions. Topics to be covered include:

  • Node types for different tasks
  • Accessing Casper resources through the Slurm job scheduler
  • Interactive jobs and virtual remote desktops
  • Using GPUs on Casper

Please use this link to register.

June 11, 2020

Users are reminded that the Cheyenne HPC system will be unavailable for one week in mid-July to allow CISL staff and external contractors to perform power infrastructure repairs at the NCAR-Wyoming Supercomputing Center (NWSC). Some other systems will be unavailable for one day.

The maintenance period will begin Monday, July 13, and Cheyenne is expected to be returned to service by Saturday, July 18. The Casper cluster, GLADE and Campaign Storage file systems, data-access nodes, and HPSS will remain available throughout the week except for Tuesday, July 14. Some maintenance on those systems has been scheduled since our previous announcement. Watch for more details and updates in the Daily Bulletin.

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