MR AM should reuse containers for map tasks -------------------------------------------
Key: MAPREDUCE-3902 URL: https://issues.apache.org/jira/browse/MAPREDUCE-3902 Project: Hadoop Map/Reduce Issue Type: Improvement Components: applicationmaster, mrv2 Reporter: Arun C Murthy Assignee: Arun C Murthy The MR AM is now in a great position to reuse containers across (map) tasks. This is something similar to JVM re-use we had in 0.20.x, but in a significantly better manner: # Consider data-locality when re-using containers # Consider the new shuffle - ensure that reduces fetch output of the whole container at once (i.e. all maps) -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa For more information on JIRA, see: http://www.atlassian.com/software/jira