I would think this should be done at the application level.
After all, the core functionality of SparkStreaming is to capture RDDs in
some real time interval and process them -
not to aggregate their results.

But maybe there is a better way.......

On Thu, Nov 13, 2014 at 8:28 PM, SK <skrishna...@gmail.com> wrote:

> Hi,
>
> I am using the following code to generate the (score, count) for each
> window:
>
> val score_count_by_window  = topic.map(r =>  r._2)   // r._2 is the integer
> score
>                                                      .countByValue()
>
> score_count_by_window.print()
>
> E.g. output for a window is as follows, which means that within the Dstream
> for that window, there are 2 rdds with score 0; 3 with score 1, and 1 with
> score -1.
> (0, 2)
> (1, 3)
> (-1, 1)
>
> I would like to get the aggregate count for each score over all windows
> until program terminates. I tried countByValueAndWindow() but the result is
> same as countByValue() (i.e. it is producing only per window counts).
> reduceByWindow also does not produce the result I am expecting. What is the
> correct way to sum up the counts over multiple windows?
>
> thanks
>
>
>
>
>
>
>
>
>
>
> --
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-- 
jay vyas

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