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https://issues.apache.org/jira/browse/HADOOP-3498?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12627131#action_12627131
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Hairong Kuang commented on HADOOP-3498:
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+1 The optimization looks good to me.
> File globbing alternation should be able to span path components
> ----------------------------------------------------------------
>
> Key: HADOOP-3498
> URL: https://issues.apache.org/jira/browse/HADOOP-3498
> Project: Hadoop Core
> Issue Type: Improvement
> Components: fs
> Reporter: Tom White
> Assignee: Tom White
> Fix For: 0.19.0
>
> Attachments: hadoop-3498-v2.patch, hadoop-3498.patch
>
>
> For example, {/a/b,/c/d} should expand to /a/b and /c/d. This change would
> also permit a consistent syntax for specifying multiple input paths to
> MapReduce, streaming and Pig by specification of a single glob path with
> alternation {/a/b,/c/d}, rather than a collection of comma separated glob
> paths /a/b,/c/d.
> This change would also make globbing more consistent with bash, which
> supports this feature.
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