[ https://issues.apache.org/jira/browse/MAPREDUCE-2632?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Andrew Wang updated MAPREDUCE-2632: ----------------------------------- Target Version/s: (was: ) Release Note: A partitioner is now only created if there are multiple reducers. I added a release note based on my understanding of this patch, please update if something's off. > Avoid calling the partitioner when the numReduceTasks is 1. > ----------------------------------------------------------- > > Key: MAPREDUCE-2632 > URL: https://issues.apache.org/jira/browse/MAPREDUCE-2632 > Project: Hadoop Map/Reduce > Issue Type: Improvement > Affects Versions: 0.23.0 > Reporter: Ravi Teja Ch N V > Assignee: Sunil G > Fix For: 3.0.0-alpha1 > > Attachments: 0001-MAPREDUCE-2632.patch, MAPREDUCE-2632-1.patch, > MAPREDUCE-2632.patch, mr-2632-2.patch, mr-2632-3.patch, mr-2632-4.patch > > > We can avoid the call to the partitioner when the number of reducers is > 1.This will avoid the unnecessary computations by the partitioner. -- This message was sent by Atlassian JIRA (v6.3.4#6332) --------------------------------------------------------------------- To unsubscribe, e-mail: mapreduce-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: mapreduce-issues-h...@hadoop.apache.org