Akira Ajisaka created MAPREDUCE-6795: ----------------------------------------
Summary: Update the document for JobConf#setNumReduceTasks Key: MAPREDUCE-6795 URL: https://issues.apache.org/jira/browse/MAPREDUCE-6795 Project: Hadoop Map/Reduce Issue Type: Improvement Components: documentation Reporter: Akira Ajisaka The following document is for MRv1. We should update the document for MapReduce on YARN. {code:title=JobConf.java} * <b id="NoOfReduces">How many reduces?</b> * * <p>The right number of reduces seems to be <code>0.95</code> or * <code>1.75</code> multiplied by (<<i>no. of nodes</i>> * * <a href="{@docRoot}/../mapred-default.html#mapreduce.tasktracker.reduce.tasks.maximum"> * mapreduce.tasktracker.reduce.tasks.maximum</a>). * </p> {code} -- This message was sent by Atlassian JIRA (v6.3.4#6332) --------------------------------------------------------------------- To unsubscribe, e-mail: mapreduce-dev-unsubscr...@hadoop.apache.org For additional commands, e-mail: mapreduce-dev-h...@hadoop.apache.org