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From Aaron Kimball <aa...@cloudera.com>
Subject Re: Hadoop streaming: How is data distributed from mappers to reducers?
Date Tue, 25 Aug 2009 00:43:52 GMT
Yes. It works just like Java-based MapReduce in that regard.
- Aaron

On Sun, Aug 23, 2009 at 5:09 AM, Nipun Saggar <nipun.saggar@gmail.com>wrote:

> Hi all,
> I have recently started using Hadoop streaming. From the documentation, I
> understand that by default, each line output from a mapper up to the first
> tab becomes the key and rest of the line is the value. I wanted to know
> that
> between the mapper and reducer, is there a shuffling(sorting) phase? More
> specifically, Would it be correct to assume that output from all mappers
> with the same key will go to the same reducer?
> Thanks,
> Nipun

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