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Posted to hdfs-user@hadoop.apache.org by Yue Guan <pi...@gmail.com> on 2012/08/28 21:08:41 UTC

is there sort after mapper before combiner?

Hi, there

I'm wondering if there is a sort after mapper before combiner? like
those case in reducer. I know I probably wrong. As I guess in mapper,
pair is in memory and a hash of list should do the work. Thank you
very much!