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From Patrick McCarthy <pmccar...@dstillery.com.INVALID>
Subject Re: Using Percentile in Spark SQL
Date Mon, 11 Nov 2019 15:16:06 GMT
Depending on your tolerance for error you could also use
percentile_approx().

On Mon, Nov 11, 2019 at 10:14 AM Jerry Vinokurov <grapesmoker@gmail.com>
wrote:

> Do you mean that you are trying to compute the percent rank of some data?
> You can use the SparkSQL percent_rank function for that, but I don't think
> that's going to give you any improvement over calling the percentRank
> function on the data frame. Are you currently using a user-defined function
> for this task? Because I bet that's what's slowing you down.
>
> On Mon, Nov 11, 2019 at 9:46 AM Tzahi File <tzahi.file@ironsrc.com> wrote:
>
>> Hi,
>>
>> Currently, I'm using hive huge cluster(m5.24xl * 40 workers) to run a
>> percentile function. I'm trying to improve this job by moving it to run
>> with spark SQL.
>>
>> Any suggestions on how to use a percentile function in Spark?
>>
>>
>> Thanks,
>> --
>> Tzahi File
>> Data Engineer
>> [image: ironSource] <http://www.ironsrc.com/>
>>
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>
>
> --
> http://www.google.com/profiles/grapesmoker
>


-- 


*Patrick McCarthy  *

Senior Data Scientist, Machine Learning Engineering

Dstillery

470 Park Ave South, 17th Floor, NYC 10016

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