ypeC, ValuetypeD*);
>
>
>
> }
>
>
>
> hopes this help!
>
>
>
> regards
>
>
> Alain
>
>
>
> [@@THALES GROUP RESTRICTED@@]
>
>
>
> *De :* Stanley Xu [mailto:wenhao...@gmail.com]
> *Envoyé :* mercredi 16 février 2011 12:02
> *À :*
ontext.write(KeyTypeC, ValuetypeD);
}
hopes this help!
regards
Alain
[@@THALES GROUP RESTRICTED@@]
De : Stanley Xu [mailto:wenhao...@gmail.com]
Envoyé : mercredi 16 février 2011 12:02
À : mapreduce-user@hadoop.apache.org
Objet : Could we use different output Format for the Mapper and Combiner?
Dea
The combiner must "have the same input and output key types and the
same input and output value types" (as per the docs for setting one.)
The combined outputs are treated as typical map outputs after
processing, so that the reducer still applies on it properly. For this
to work, your combiner can'
Dear all,
I am writing a map-reduce job today. Which I hope I could use different
format for the Mapper and Combiner. I am using the Text as the format of the
Mapper and MapWritable as the format of the format.
But it looks the hadoop didn't support that yet?
I have some code like the following:
