techdocsmith commented on a change in pull request #11506:
URL: https://github.com/apache/druid/pull/11506#discussion_r698651402
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File path: docs/ingestion/native-batch.md
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@@ -369,11 +369,16 @@ Druid currently supports only one partition function.
The Parallel task will use one subtask when you set `maxNumConcurrentSubTasks`
to 1.
-> Be aware that, with this technique, segment sizes could be skewed if your
chosen `partitionDimension` is also skewed in source data.
-
-> While it is technically possible to concatenate multiple dimensions into a
single new dimension
-> that you go on to specify in `partitionDimension`, remember that you _must_
then use this newly concatenated dimension at query time
-> in order for segment pruning to be effective.
+When you use this technique to partition your data, segment sizes may be
unequally distributed if the data
+in your `partitionDimension` is also unequally distributed. Therefore, to
avoid imbalance in data layout,
+ review the distribution of values in your source data before deciding on a
partitioning strategy.
+
+For segment pruning to be effective and translate into better query
performance, you must use
+the `partitionDimension` at query time. You can concatenate values from
multiple
+dimensions into a new dimension to use as the `partitionDimension`. In this
case, you
+must use that new dimension in your native filter `WHERE` clause.
+> [native filter](../querying/filters.md) /
+> [WHERE clause](../querying/sql.md#where).
Review comment:
```suggestion
```
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