[ https://issues.apache.org/jira/browse/MAPREDUCE-3289?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Arun C Murthy updated MAPREDUCE-3289: ------------------------------------- Fix Version/s: (was: 1.2.0) 1.1.0 I just merged it to branch-1.1 too. > 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 > Fix For: 1.1.0, 2.0.2-alpha > > Attachments: 3289-1.txt, 3289-2.txt, MAPREDUCE-3289.branch-1.patch, > MAPREDUCE-3289.branch-1.patch, MR3289_trunk_2.txt, MR3289_trunk_3.txt, > MR3289_trunk.txt, 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 For more information on JIRA, see: http://www.atlassian.com/software/jira