Hi, I've read the documentation for CombinePerKey with hot key fanout and I think I understand it at a high level (split up and combine sharded keys before merging all values in one key) but I'm confused by the parameter that this method takes and how it affects the behavior of the transform.
Is the fanout parameter the... number of shards per key? Am I thinking about this right? Any help would be appreciated, thanks! Joey [1] https://beam.apache.org/releases/pydoc/current/apache_beam.transforms.core.html#apache_beam.transforms.core.CombinePerKey.with_hot_key_fanout
