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Hadoop, mail # user - Right way to implement MR ?


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Re: Right way to implement MR ?
samir das mohapatra 2012-05-24, 18:19
Thanks
  Harsh J for your help.

On Thu, May 24, 2012 at 1:24 AM, Harsh J <[EMAIL PROTECTED]> wrote:

> Samir,
>
> You can use MultipleInputs for multiple forms of inputs per mapper
> (with their own input K/V types, but common output K/V types) with a
> common reduce-side join/compare.
>
> See
> http://hadoop.apache.org/common/docs/current/api/org/apache/hadoop/mapreduce/lib/input/MultipleInputs.html
> .
>
> On Thu, May 24, 2012 at 1:17 AM, samir das mohapatra
> <[EMAIL PROTECTED]> wrote:
> > Hi All,
> >     How to compare to input file In M/R Job.
> >     let A Log file around 30GB
> >    and B Log file size is around 60 GB
> >
> >  I wanted to know how  i will  define <K,V> inside the mapper.
> >
> >  Thanks
> >  samir.
>
>
>
> --
> Harsh J
>