Derecho Checklist

Derecho Checklist

Derecho is the upcoming HPC cluster and there will need to be changes to WRF-Hydro to prepare for optimal performance. Gust, a small test system designed to prototype Derecho, can be used for testing.

Performance

• Use more MPI Collectives for better performance

Reduce number of files for file system

Reduce Number of Input Files

Method	Pros	Cons
Add hourly time dimension in restart files

Related issues

• #504

Reduce Numer of Output Files

Method	Pros	Cons
Add hourly time dimension in output files

Related issues

• #481
• #103
• #229
• #301
• #448
• #627

Bugs

• with Cray compiler -O3 breaks wrf-hydro

Wishlist

• eliminate warnings from Cray compiler