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Every rank evaluates properties, equations and the smoother on its ghost cells too, so the slowest rank is set by owned + ghost cells, not by the edge cut. MetisPartitioner gets objective = :cut (default, as before) or :vol (METIS total communication volume), and partition_distributed uses :vol. The well-cell node weight (10) becomes the group_weight keyword. Largest local subdomain (owned + ghost), edge cut -> volume: Norne np 8: 7483 -> 6897 (-8%), np 16: 4209 -> 3889 (-8%); refined Norne np 16 -3%, Egg np 16 -3%, OLYMPUS np 16 -2%. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Every rank evaluates properties, equations and the smoother on its ghost cells too, so the slowest rank is set by owned + ghost cells, not by the edge cut. MetisPartitioner gets objective = :cut (default, as before) or :vol (METIS total communication volume), and partition_distributed uses :vol. The well-cell node weight (10) becomes the group_weight keyword.
Largest local subdomain (owned + ghost), edge cut -> volume: Norne np 8: 7483 -> 6897 (-8%), np 16: 4209 -> 3889 (-8%); refined Norne np 16 -3%, Egg np 16 -3%, OLYMPUS np 16 -2%.