Hi, Can you see if the MultipleOutputs class can work for you ?
( http://hadoop.apache.org/docs/r1.0.3/api/org/apache/hadoop/mapreduce/lib/output/MultipleOutputs.html ) On Mon, Sep 17, 2012 at 12:46 PM, Jason Yang <[email protected]>wrote: > 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? > > -- > YANG, Lin > >
