Chain Map/Reduce

[Saravanan Nagarajan]

> HI,
>
>
> I got understanding of chain Map/reduce approach and I like to know  when
> we will use MAP-MAP or MAP-REDUCER-MAP.
>
>
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> If you have sample scenario or programmes, please share with me.
>
>
> Thank you for your support.
>
>
> Regards,
>
> Saravanan
>