Radim Kolar created MAPREDUCE-5153: -------------------------------------- Summary: Support for running combiners without reducers Key: MAPREDUCE-5153 URL: https://issues.apache.org/jira/browse/MAPREDUCE-5153 Project: Hadoop Map/Reduce Issue Type: New Feature Reporter: Radim Kolar
scenario: Workflow mapper -> sort -> combiner -> hdfs No api change is need, if user set combiner class and reducers = 0 then run combiner and sent output to HDFS. Popular libraries such as scalding and cascading are offering this functionality, but they use caching entire mapper output in memory. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira