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From Mich Talebzadeh <mich.talebza...@gmail.com>
Subject Re: Load Time from HDFS
Date Wed, 10 Apr 2019 19:32:40 GMT
Have you tried looking at Spark GUI to see the time it takes to load from
HDFS?

Spark GUI by default runs on port 4040. However, you can set in spark-submit

${SPARK_HOME}/bin/spark-submit  \

…...
--conf "spark.ui.port=xxxx"

and access it through hostname:port

HTH

Dr Mich Talebzadeh



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On Wed, 10 Apr 2019 at 18:56, yeikel valdes <email@yeikel.com> wrote:

> What about a simple call to nanotime?
>
> long startTime = System.nanoTime();
>
> //Spark work here
>
> long endTime = System.nanoTime();
>
> long duration = (endTime - startTime)
>
> println(duration)
>
> Count recomputes the df so it makes sense it takes longer for you.
>
>
> ---- On Tue, 02 Apr 2019 07:06:30 -0700 * kolokasis@ics.forth.gr
> <kolokasis@ics.forth.gr> * wrote ----
>
> Hello,
>
> I want to ask if there any way to measure HDFS data loading time at
> the start of my program. I tried to add an action e.g count() after val
> data = sc.textFile() call. But I notice that my program takes more time
> to finish than before adding count call. Is there any other way to do it ?
>
> Thanks,
> --Iacovos
>
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>

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