zhengruifeng commented on issue #26483: [SPARK-29823][MLLIB] Improper persist strategy in mllib.clustering.KMeans.run() URL: https://github.com/apache/spark/pull/26483#issuecomment-569480945 I mean, `input: RDD[Vector]` is likely to be cached outside of this method: 1, it is cached in ml.KMeans 2, end uers are likely to cache it outside of train/run, since it is suggested in related docs So if we cache `zippedData`, we really cache input twice.
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