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Posted to common-user@hadoop.apache.org by 黄山 <th...@gmail.com> on 2012/04/26 11:08:08 UTC

AutoInputFormat

I use org.apache.hadoop.streaming.AutoInputFormat to handle sequence file input for streaming, but I found that it provide format below for <key, value>.  ( key is a string , value is binary)

"keystring\tvalue\n"

since value is binary, there is a lot '\n' within value, my mapper can't distinguish it.

in other words, I need value presented as length + raw bytes or typed bytes  

I called streaming as below:

         $HADOOP_HOME/bin/hadoop jar \
         $HADOOP_HOME/contrib/streaming/hadoop-streaming-1.0.2.jar \
         -input data.seq \
         -output output \
         -mapper mapper \
         -reducer reducer \
         -inputformat org.apache.hadoop.streaming.AutoInputFormat \
         -file mapper \
         -file reducer





huangs
thuhuangs09@gmail.com