[ https://issues.apache.org/jira/browse/MAPREDUCE-3289?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Todd Lipcon updated MAPREDUCE-3289:
-----------------------------------
Attachment: 3289-2.txt
3289-1.txt
Attaching two patches which apply to some version of branch-1, though probably not the tip
of it. These two, together, implement the feature in MR1 with the bug fix mentioned above.
I haven't had time to forward-port the patch to MR2 again with this fix, but it should be
reasonably straightforward.
> 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: 3289-1.txt, 3289-2.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: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira
|