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From viirya <>
Subject [GitHub] spark pull request #15821: [SPARK-13534][PySpark] Using Apache Arrow to incr...
Date Thu, 30 Mar 2017 03:39:33 GMT
Github user viirya commented on a diff in the pull request:
    --- Diff: sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala ---
    @@ -2747,6 +2747,17 @@ class Dataset[T] private[sql](
    +  /**
    +   * Collect a Dataset as ArrowPayload byte arrays and serve to PySpark.
    +   */
    +  private[sql] def collectAsArrowToPython(): Int = {
    +    val payloadRdd = toArrowPayloadBytes()
    +    val payloadByteArrays = payloadRdd.collect()
    --- End diff --
    @BryanCutler Btw, it is not for performance gain I think. `toLocalIteratorAndServe` can
avoid collect all data at once into the driver. So it may be good for the memory usage on
the driver side.

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