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https://issues.apache.org/jira/browse/MAPREDUCE-5896?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14008903#comment-14008903
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Tom White commented on MAPREDUCE-5896:
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>From a compatibility point of view I think the changes are OK, although
>SplitLocationInfo should not (yet) be marked as @Stable. Also,
>mapred.FileSplit has a new getSplitLocationInfo() method, but it should be
>getLocationInfo(). Add an @Override annotation to catch this.
How would the split calculation in FileInputFormat change to use hosts with a
cached copy of a particular block? It would be worth creating a trial
implementation to test that the changes are sufficient.
> Allow InputSplits to indicate which locations have the block cached in memory
> -----------------------------------------------------------------------------
>
> Key: MAPREDUCE-5896
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-5896
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Affects Versions: 2.4.0
> Reporter: Sandy Ryza
> Assignee: Sandy Ryza
> Attachments: MAPREDUCE-5896.patch
>
>
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