1. Ligia Bernardet 09 January 2012 HFIP Ensemble Team meeting GSI-hybrid code management: what can we learn from learn from HWRF?

2. Current HWRF Repository Structure 2 HWRF code repository hosted by DTC Trunk contains scripts, namelists, and source code Source directory build system: top makefile builds all components The eight components of HWRF are “links” to the community repositories A EnKF directory can be added as another component

3. HWRF components 3 ComponentCommunity Repository host Additional Repositories WRFNCAR / MMM- WPSNCAR / MMM- HWRF-Utilities * DTC- GSI (contains hybrid capab)DTCEMC NCEP CouplerDTC- POM-TCDTC- UPPDTCEMC GFDL Vortex TrackerDTC- EnKF?? sync * libraries, vortex initialization, tools

4. EnKF code repository requirements 4 Maintained and administered in a straightforward way Provides reliable, almost un-interrupted access, backed-up Provides access to all developers Requires least amount of labor Has safeguards to prevent damaging operational code by outside contributions Has framework that minimizes errors when merging code between development and trunk Our requirements should lead us to the best solution!