Create Clone#

The tool that clones a new case based on an existing case is create_clone. This tool is located in the $SRCROOT directory under the cime/scripts directory.

Things that are copied into the new case are:

  • Most env_*.xml settings (not all!)

  • user_nl_xxx files

  • Macros

  • SourceMods

  • Batch system files

  • README.case

Things that are not copied into the new case are:

  • Logs

  • Timing files

Command Syntax#

Go to the cime/scripts directory in the CESM code

cd /glade/work/$USER/code/my_cesm_code/cime/scripts/

Example of basic ./create_clone syntax to create CASE2: 

./create_clone --clone /glade/work/$USER/cases/CASE1 --case /glade/work/$USER/cases/CASE2

Notes:

  • Do not use cp or cp -R to copy case directories to new experiments.

  • Document changes in CaseStatus and README.case to keep track of the changes you make.

  • If you are making many cases with only a small changes, you can script the steps into a python or shell script of your choice to make the process more automated and less prone to human error.