mbutrovich commented on code in PR #2578:
URL: https://github.com/apache/datafusion-comet/pull/2578#discussion_r2432627173
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native/core/src/execution/shuffle/row.rs:
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@@ -839,6 +839,7 @@ pub fn process_sorted_row_partition(
.open(&output_path)?;
output_data.write_all(&frozen)?;
+ output_data.flush()?;
Review Comment:
Does a partially written file read back successfully? Otherwise I don't
think flushing each batch, resulting in an unrecoverable, partially-written
file makes sense. If it's not readable, `flush()` should be outside of the loop
after all batches have been written. Also it's misleading to say that this
avoids data loss, since `flush()` does not do an `fsync()`.
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