Daily Bulletin

GLADE Reconfigurations: p, Collections, and Cheyenne Scratch Retirement Process and Deadlines

January 29, 2024

Particular subsystems of GLADE serving /glade/p, glade/collections, and /glade/scratch (Cheyenne’s scratch file system) will be retired on February 28, 2024. This transition has been underway for several months and is required as these components have reached end-of-life. There are several remaining steps in this process that will aid users in identifying any data sets still in need of relocation into either Derecho Scratch or Campaign Storage.  

For /glade/scratch:

For ALL USERS (Cheyenne’s scratch file system):
Consistent with use as temporary storage, CISL has no plans to migrate scratch data between Cheyenne and Derecho, however users can self-migrate data as described here. The following access deadlines apply to /glade/scratch for all users:
  1. Wednesday, February 21st:
    • Write permissions removed from /glade/scratch/<USERNAME> spaces.
    • This will cause any workflows still writing to Cheyenne’s scratch file system to fail, especially helpful to identify “forgotten” use.
  2. Wednesday, February 28th:
    • Cheyenne’s scratch file system is permanently retired. Any remaining data on /glade/scratch will be lost.
    • Unmount /glade/scratch from all user-facing systems.

For /glade/p and /glade/collections: 

For NCAR Labs:
  1. Wednesday, February 7th:
    • Write permissions removed from file spaces.
    • This will cause any workflows still writing to /glade/p/<NCAR_LAB> to fail, especially helpful to identify “forgotten” use.
  2. Wednesday, February 14th: 
    • Read permissions removed from file spaces.
    • This will cause any workflows still reading from deprecated project space to fail, especially helpful to identify “forgotten” use.
    • This period allows us about two weeks to triage forgotten read access workflows. 
  3. Wednesday, February 28th to  Friday, March 1st:
    • Unmount current /glade/p and /glade/collections from all user-facing systems.
      • During this time-window, any workflows still accessing data under these paths will fail!
    • Perform decommissioning steps that require a “quiet” files system.
    • Replace certain /glade/p, /glade/collections paths with symbolic links into relocated Campaign Storage destinations.

For Active University Projects:
CISL Staff are automatically relocating data from /glade/p/univ/ and /glade/p/uwyo/ into Campaign Storage File spaces as described here. 
  1. Wednesday, February 28th to  Friday, March 1st:
    • Unmount current /glade/p and /glade/collections from all user-facing systems
      • During this time window any workflows still accessing data under these paths will temporarily  fail!
    • Perform decommissioning steps that require a “quiet” files system.
    • Replace /glade/p/univ, /glade/p/uwyo paths with symbolic links into relocated Campaign Storage destinations, re-enabling access through these path names.

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National Science Foundation
This material is based upon work supported by the National Center for Atmospheric Research, a major facility sponsored by National Science Foundation and managed by the University Corporation for Atmospheric Research. Any opinions, findings and conclusions or recommendations expressed in this material do not necessarily reflect the views of the National Science Foundation.