eeroel commented on PR #37868:
URL: https://github.com/apache/arrow/pull/37868#issuecomment-1734814072

   > So this `size` is expect to avoid a `HEAD` or `LIST` request in Object 
Store? Seems that this might be a bit dangerous if the size doesn't match
   
   Yes, that's the idea. In Delta Lake and I believe in Iceberg as well, the 
objects are not changed after they are written, so the size that those formats 
store in their metadata should be correct always.


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