Why multithread the mapper? Just create more mappers. That way you spread the data load as well as the mapping load potentially across multiple nodes.
kenyh wrote: > > I wonder if there are any optimization about the multithread mapper to > decrease the contention of input reading and output? > -- View this message in context: http://old.nabble.com/MultithreadedMapper-tp34213805p34217963.html Sent from the Hadoop core-dev mailing list archive at Nabble.com.
