1. Mariana Vertenstein CCSM Software Engineering Group NCAR
SEWG Priorities
Mariana Vertenstein
CCSM Software Engineering Group
NCAR
1/1/2019

2. Main Priorities and Goals
Enhance interoperability
Increase software and scientific extensibility
Optimize performance
Improve software engineering infrastructure
1/1/2019

3. Improve Interoperability
Both inter-model and intra-model
Simplify and standardize exchange of information within CCSM
Enable sequential or concurrent functionality
Evaluate creation of single executable version of CCSM using ESMF – standardize interfaces for inter-model coupling
Evaluate physics-dynamics coupling in CAM using ESMF
Evaluate CLM-RTM coupling in CLM using ESMF
1/1/2019

4. Improve Extensibility
Provide enhanced data model functionality (Data Model rewrite project)
unify current scientific and software functionality
permit straightforward creation of much needed new data models (such as SOM)
permit new experiments involving prescribed forcing data to be carried out more easily
Create and utilize capability to easily exchange new fluxes/tracers between components as new biogeochemical functionality of the model evolves (SciDAC collaboration)
Create capability to run at high resolution and save information more frequently
1/1/2019

5. Improve Performance
Instrument CCSM to better characterize performance.
As model components evolve in complexity and increased resolution - continue to optimize performance on a select set of computer architectures.
Incorporate performance regression as standard part of testing.
Removal of future performance bottlenecks will necessitate parallel I/O.
1/1/2019

6. Improve Infrastructure
Migration to new revision control system.
Incorporation of a new bug tracking system.
Creation of the new CCSM and CAM bulletin board this fall has greatly helped user community interactions.
1/1/2019

7. No official community support
Community support sharply reduced.
No official moderator of bulletin board.
No patch distributions this spring.
Official support policy now reflects this.
1/1/2019

8. Positive Steps Forward
Implemented lightweight design review process
Improved test suites (CCSM and CAM)
Moved towards improved software design - new code now includes layering and use of interfaces
Moved toward incorporating well-defined, standard interfaces where appropriate
For setting …
1/1/2019

9. Positive Steps (cont) Moving towards some script/build standardization
Improved communication - made a commitment to web pages and documents that communicate project requirements and process.
Put time lines in place to facilitate planning and priority setting.
1/1/2019