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From Matei Zaharia <>
Subject Re: Possibly a dumb question: differences between saveAsNewAPIHadoopFile and saveAsNewAPIHadoopDataset?
Date Mon, 22 Sep 2014 08:12:11 GMT
File takes a filename to write to, while Dataset takes only a JobConf. This means that Dataset
is more general (it can also save to storage systems that are not file systems, such as key-value
stores), but is more annoying to use if you actually have a file.


On September 21, 2014 at 11:24:35 PM, innowireless TaeYun Kim (



I’m confused with saveAsNewAPIHadoopFile and saveAsNewAPIHadoopDataset.

What’s the difference between the two?

What’s the individual use cases of the two APIs?

Could you describe the internal flows of the two APIs briefly?


I’ve used Spark several months, but I have no experience on MapReduce programming.

(I’ve read a few book chapters on MapReduce, but actually not written code myself.)

So maybe this confusion comes from my lack of experience on MapReduce programming.

(I hoped it won’t necessary to have since I could use Spark…)



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