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Posted to yarn-dev@hadoop.apache.org by Prabhu Josephraj <pj...@cloudera.com.INVALID> on 2019/02/08 11:28:38 UTC

How Useful YARN Placement Constraint for MapReduce Jobs

Hi,

      Was thinking on supporting YARN Placement Constraint for MapReduce
Applications, but want to check with you on how useful it will be?. Mappers
usually runs on Data Local machine and so won't need but Reducers can gain
by distributing the reducers to different machine using Anti Affinity. And
also by having Affinity to say HRegionServer Machine in case of writing
output to Hbase.

Thanks,
Prabhu Joseph