Updates to the MetGrid initialization and forcing pathway #2806
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…memory bottlenecks and facilitate multilevel configurations. The MetGrid pathway now processes each time sequentially to reduce the memory footprint. Temporary variables were previously fabs, which introduced a memory bottleneck that scaled in severity with the number of ranks, but have been updated to MultiFabs to eliminiate this bottleneck.
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These updates resolve some memory bottlenecks and facilitate multilevel configurations. The MetGrid pathway now processes each time sequentially to reduce the memory footprint. Temporary variables were previously fabs, which introduced a memory bottleneck that scaled in severity with the number of ranks, but have been updated to MultiFabs to eliminate this bottleneck.
Note: this is a second PR with a clean port of the changes from the original PR, which is to be closed and not merged.