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From Jason Yang <lin.yang.ja...@gmail.com>
Subject How to output according to the key in reducer?
Date Mon, 17 Sep 2012 07:16:57 GMT
Hi, all

I was wondering how to write all the input with the same key to a single
file in the reducer ?

say, I got some intermediate outputs from mappers like that:
key     value
1   annie
2   Jason
1   andy
2   Joey
1   andrew

and I would like write all the intermediate outputs with key 1 to file
"ID_1.dat", and all the intermediate outputs with key 2 to file "ID_2.data".

how could I achieve that?


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