EnricoMi commented on code in PR #44470: URL: https://github.com/apache/arrow/pull/44470#discussion_r2079083583
########## python/pyarrow/dataset.py: ########## @@ -893,7 +893,12 @@ def write_dataset(data, base_dir, *, basename_template=None, format=None, ``FileFormat.make_write_options()`` function. use_threads : bool, default True Write files in parallel. If enabled, then maximum parallelism will be - used determined by the number of available CPU cores. + used determined by the number of available CPU cores. Using multiple + threads may change the order of rows in the written dataset. Review Comment: It is good to be redundant here if this reduces chance for users to miss the `preserve_order` option below. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: github-unsubscr...@arrow.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org