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Posted to mapreduce-user@hadoop.apache.org by Han JU <ju...@gmail.com> on 2013/05/07 16:25:47 UTC

Possible to query the number of values as input of a reducer?

Hi,

Just a small question. Is there a way to know how many values associated
with a key in a reducer, without using containers to store all of them?

Thanks.

-- 
*JU Han*

Software Engineer Intern @ KXEN Inc.
UTC   -  Université de Technologie de Compiègne
*     **GI06 - Fouille de Données et Décisionnel*

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