Github user danielyli commented on a diff in the pull request:
https://github.com/apache/spark/pull/17793#discussion_r114039105
--- Diff: mllib/src/main/scala/org/apache/spark/ml/recommendation/ALS.scala
---
@@ -1026,7 +1161,24 @@ object ALS extends DefaultParamsReadable[ALS] with
Logging {
}
/**
- * Partitions raw ratings into blocks.
+ * Groups an RDD of `Rating`s by the user partition and item partition
to which each `Rating` maps
--- End diff --
Agreed.
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