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Hadoop, mail # user - Sorting Numbers using mapreduce


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Re: Sorting Numbers using mapreduce
Hemanth Yamijala 2010-09-06, 05:42
Hi,

On Mon, Sep 6, 2010 at 1:47 AM, Neil Ghosh <[EMAIL PROTECTED]> wrote:
> Hi,
>
> I am trying to sort a list of numbers (one per line) using  hadoop
> mapreduce.
> Kindly suggest any reference and code.
>
> How do I implement custom input format and recordreader so that both key and
> value are the number?
>
> I am using Hadoop 0.20.2
>

In the examples that come with Hadoop, you can find a 'sort' example.
The source is at o.a.h.examples.Sort.java. This should give you a good
starting point, IMO.

Thanks
Hemanth

> Thanks
> Neil
>
> --
> Thanks and Regards
> Neil
> http://neilghosh.com
>