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From hong <minghong.z...@163.com>
Subject Is map running in parallel?
Date Tue, 08 Jul 2008 13:36:55 GMT

when we run map-reduce on hadoop, is the map running in a single node  
or running in parallel on several nodes?

If it is running in parallel, the input file should be split. how can  
hadoop split input file in right position? For example, in wordcount,
the input file cannot be divided at the middle of a word. 

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