EnricoMi commented on code in PR #44470:
URL: https://github.com/apache/arrow/pull/44470#discussion_r2079083583
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python/pyarrow/dataset.py:
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@@ -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.
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