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宿荣全 commented on SPARK-4817:
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[~srowen]
Ithink that this modification is not the same as [SPARK-3325].
[SPARK-3325]:
Print the specified number of data only.
[SPARK-4817]：
printTop(num)
1.Print the specified number of data only.
2.Handle all of the elements in RDD.
> [streaming]Print the specified number of data and handle all of the elements in RDD
> -----------------------------------------------------------------------------------
>
> Key: SPARK-4817
> URL: https://issues.apache.org/jira/browse/SPARK-4817
> Project: Spark
> Issue Type: New Feature
> Components: Streaming
> Reporter: 宿荣全
> Priority: Minor
>
> Dstream.print function:Print 10 elements and handle 11 elements.
> A new function based on Dstream.print function is presented:
> the new function:
> Print the specified number of data and handle all of the elements in RDD.
> there is a work scene:
> val dstream = stream.map->filter->mapPartitions->print
> the data after filter need update database in mapPartitions,but don't need print each
data,only need to print the top 20 for view the data processing.
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