Extending Scalability of the Community Atmosphere ModelPresenter: Patrick H. Worley, ORNL |
The parallel implementation of the Community Atmosphere Model (CAM) employs a number of different domain decompositions. Currently, each decomposition must utilize the same number of MPI processes, limiting the scalability of CAM to that of the least scalable decomposition. This limitation becomes unacceptably restrictive when including additional physical processes such as atmospheric chemistry or cloud resolving physics. We are generalizing CAM to allow the number of active MPI processes to vary between domain decompositions. We are also introducing new domain decompositions to address new physics scenarios. This presentation describes the initial results and future plans.