[ https://issues.apache.org/jira/browse/MAPREDUCE-3289?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Robert Joseph Evans updated MAPREDUCE-3289: ------------------------------------------- Target Version/s: 2.0.0, 3.0.0 (was: 0.23.1) > Make use of fadvise in the NM's shuffle handler > ----------------------------------------------- > > Key: MAPREDUCE-3289 > URL: https://issues.apache.org/jira/browse/MAPREDUCE-3289 > Project: Hadoop Map/Reduce > Issue Type: Improvement > Components: mrv2, nodemanager, performance > Affects Versions: 0.23.0 > Reporter: Todd Lipcon > Assignee: Todd Lipcon > Attachments: mr-3289.txt > > > Using the new NativeIO fadvise functions, we can make the NodeManager > prefetch map output before it's send over the socket, and drop it out of the > fs cache once it's been sent (since it's very rare for an output to have to > be re-sent). This improves IO efficiency and reduces cache pollution. -- 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