Running UMUI Jobs on ARCHER2

Only UMUI versions 7.3 & 8.4 are supported on ARCHER2.

Initial setup

1. Add the following snippet to your ARCHER2 ~/.bash_profile:

   # Setup UM Variables
   VN=7.3 ## or 8.4 as appropriate
   if test -f $HOME/.umsetvars_$VN; then
     . $HOME/.umsetvars_$VN
   else
     . /work/y07/shared/umshared/vn$VN/cce/scripts/.umsetvars_$VN
   fi
   

2. Setup umui_runs directory:

   archer2$ mkdir /work/n02/n02/<archer2_username>/umui_runs
   archer2$ ln -s /work/n02/n02/<archer2_username>/umui_runs ~/umui_runs
   

Very few changes are required in order to run these jobs:

UM 8.4

• In Model Selection → User Information and Submit method → Job submission method
  • Select submission method: SLURM Cray EX (ARCHER2)
  • Set Host name to login.archer2.ac.uk
  • Set the number of processors to be a multiple of 128
  • Click the Slurm button to specify the Job time limit
    
    
• In Model Selection → FCM Configuration → FCM Extract directories and Output levels
  • Set Target machine root directory (UM_ROUTDIR) to a location on /work (e.g. /work/n02/n02/$USERID/um)
    
    
• In Model Selection → Input/Output Control and Resources → Time Convention and SCRIPT Environment Variables
  • Set DATADIR in the Defined Environment Variables table. This must be on /work (e.g. /work/n02/n02/<username>)
  • Ensure DATAM and DATAW are set to a location on /work. E.g $DATADIR/um/$RUNID

UM 7.3

• In Model Selection → User Information and Target Machine → Target Machine
  • Set Machine name to login.archer2.ac.uk
  • Set the number of processors to be a multiple of 128
    
    
• In Model Selection → Input/Output Control and Resources → Time Convention and SCRIPT Environment Variables
  • Set DATADIR in the Defined Environment Variables table. This must be on /work (e.g. /work/n02/n02/<username>)
  • Ensure DATAM and DATAW are set to a location on /work. E.g $DATADIR/um/$RUNID
    
    
• In Model Selection → Input/Output Control and Resources → Job submission, resources and re-submission pattern
  • Select submission method: SLURM Cray EX (ARCHER2)
  • Note - the model will not recognize a change to the default number of cores/node
    
    
• In Model Selection → FCM Extract and Build directories and Output levels
  • Set Target machine root directory (UM_ROUTDIR) to a location on /work (e.g. /work/n02/n02/ros/um)
    
    
• In Model Selection → Compilation and Modifications → UM User Override Files
  • The User machine overrides must use ~umui/overrides/archer2_cce_7.3_machine
  • The User file overrides must use ~umui/overrides/archer2_cce_7.3_file