Github user sethah commented on a diff in the pull request: https://github.com/apache/spark/pull/17793#discussion_r114009897 --- 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 -- `[[Rating]]`
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