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Posted to mapreduce-user@hadoop.apache.org by Ajhtal Kuchipudi <aj...@gmail.com> on 2009/11/10 15:24:05 UTC

How to run only one Reduce Task and it begins its execution only when all Map Tasks have been completed?

Hello, I need to know how to configure a job implemented in java (in Hadoop
Training Cloudera VM) to run only one Reduce Task and it begins only when
all Map Tasks have completed their execution. I need to know how to
configure this from the same Java code.

Thanks in advance.