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https://issues.apache.org/jira/browse/HADOOP-4565?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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dhruba borthakur updated HADOOP-4565:
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Attachment: CombineMultiFile8.patch
Incorprates all review comments.
@Zheng: I removed the recursion. Can you pl review this method once again?
Thanks.
@Joydeep: I changed the definition of the constructor. I also implemented code
to try to first make splits that are node local (subject to maxSplitSize). Once
this is done, then all remaining blocks are combined to create rack-local
splits. The idea behind this is that if you specify a maxSplitSize to be the
block size, then you practically get the existing defalt behaviour for all
node-local data.
@Enis: I moved the new files to mapred.lib, added JavaDocs
> MultiFileInputSplit can use data locality information to create splits
> ----------------------------------------------------------------------
>
> Key: HADOOP-4565
> URL: https://issues.apache.org/jira/browse/HADOOP-4565
> Project: Hadoop Core
> Issue Type: Improvement
> Components: mapred
> Reporter: dhruba borthakur
> Assignee: dhruba borthakur
> Attachments: CombineMultiFile.patch, CombineMultiFile2.patch,
> CombineMultiFile3.patch, CombineMultiFile4.patch, CombineMultiFile5.patch,
> CombineMultiFile7.patch, CombineMultiFile8.patch
>
>
> The MultiFileInputFormat takes a set of paths and creates splits based on
> file sizes. Each splits contains a few files an each split are roughly equal
> in size. It would be efficient if we can extend this InputFormat to create
> splits such each all the blocks in one split and either node-local or
> rack-local.
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