Support delay scheduling for node locality in MR2's capacity scheduler ----------------------------------------------------------------------
Key: MAPREDUCE-3210 URL: https://issues.apache.org/jira/browse/MAPREDUCE-3210 Project: Hadoop Map/Reduce Issue Type: Improvement Components: mrv2 Affects Versions: 0.23.0 Reporter: Todd Lipcon Assignee: Todd Lipcon The capacity scheduler in MR2 doesn't support delay scheduling for achieving node-level locality. So, jobs exhibit poor data locality even if they have good rack locality. Especially on clusters where disk throughput is much better than network capacity, this hurts overall job performance. We should optionally support node-level delay scheduling heuristics similar to what the fair scheduler implements in MR1. -- 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