rdd Archives - IT Nursery

Programming, scala

IT Nursery

(Why) do we need to call cache or persist on a RDD

When a resilient distributed dataset (RDD) is created from a text file or collection (or from another RDD), do we need to call ...

June 4, 2022
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Programming, scala

IT Nursery

Spark performance for Scala vs Python

I prefer Python over Scala. But, as Spark is natively written in Scala, I was expecting my code to run faster in the ...

May 31, 2022
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What is the difference between cache and persist?

In terms of RDD persistence, what are the differences between cache() and persist() in spark ? 6 Answers 6

May 26, 2022
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Difference between DataFrame, Dataset, and RDD in Spark

I’m just wondering what is the difference between an RDD and DataFrame (Spark 2.0.0 DataFrame is a mere type alias for Dataset...

May 15, 2022
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Spark – repartition() vs coalesce()

According to Learning Spark Keep in mind that repartitioning your data is a fairly expensive operation. Spark also has an optimized version of ...

May 10, 2022
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