CCPP Framework Meeting Minutes 2019 07 25

EMC debrief:

• meetings becoming more effective each visit - CCPP becoming a reality
• GFSv16 code freeze of highest priority, need to fix config by September 2019
• still working on gravity wave drag
• once GFSv16 is ready, move all developers to CCPP
• code management: need to keep CCPP code up to date
  • CCPP updates may come in after the IPD commits if necessary
  • this will be done by EMC and GMTB in collaboration
• workflow discussions, EMC takes the lead in adding the CCPP
• got the clear to go to convert to the new metadata
• we asked for being on gerrit code reviews
• shared responsibility of regression testing: EMC only operational code, we pick up IPD-vs-CCPP repro tests as Tier 2 on Cheyenne (and maybe more? GNU? tests that EMC decides to drop?)
• CGD has different test categories of what to run how often
  • the challenge is how to fix code retrospectively
• EMC considering themselves as responsible for the operational/pre-operational code only, research should be tested/maintained by someone else

Metadata conversion:

• use ccpp_prebuild.py which resorts to the new metadata parser when encountering a new metadata format (on a file-by-file basis)
• currently using the new metadata parser that came with the metadata converter
• better to use the new version (that comes with cap_gen) to cross-check Fortran and metadata
• two issues with the metadata converter version:
  • optional comes back as True if optional = F is in attribute list (Steve will look at this, too)
  • standard names are converted to lowercase (the new version already preserves the case, ok)
• need to keep NEPTUNE in mind when we do this

Upcoming work:

• namelist variables and suite definition files
• how to make this work with different models
• use SDF and scheme metadata to inform the model

AMS Boston January 2020:

• NWP conference with session on physics interoperability
• would be great to have NCAR (MMM, CGD?) to present there