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https://issues.apache.org/jira/browse/MAPREDUCE-4511?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13466618#comment-13466618
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Matt Foley commented on MAPREDUCE-4511:
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In branch-1.1, committed 2-line change to this patch, r1392179, to avoid use of
interface HasFileDescriptor, which doesn't exist until 1.2.0.
> Add IFile readahead
> -------------------
>
> Key: MAPREDUCE-4511
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-4511
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Components: mrv1, mrv2, performance
> Reporter: Ahmed Radwan
> Assignee: Ahmed Radwan
> Fix For: 1.1.0, 2.0.2-alpha
>
> Attachments: MAPREDUCE-4511_branch1.patch,
> MAPREDUCE-4511_branch-1_rev2.patch, MAPREDUCE-4511_branch-1_rev3.patch,
> MAPREDUCE-4511_branch-1_rev4.patch, MAPREDUCE-4511_branch-1_rev5.patch,
> MAPREDUCE-4511_branch-1_rev6.patch, MAPREDUCE-4511_branch-1_rev7.patch,
> MAPREDUCE-4511_trunk.patch, MAPREDUCE-4511_trunk_rev2.patch,
> MAPREDUCE-4511_trunk_rev3.patch, MAPREDUCE-4511_trunk_rev4.patch,
> MAPREDUCE-4511_trunk_rev5.patch, MAPREDUCE-4511_trunk_rev6.patch
>
>
> This ticket is to add IFile readahead as part of HADOOP-7714.
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