[
https://issues.apache.org/jira/browse/HADOOP-3498?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12622297#action_12622297
]
Hairong Kuang commented on HADOOP-3498:
---------------------------------------
This patch needs to scan filePattern multiple times if there are more than one
curly braces in the pattern. Multilevel nested braces will lead to the number
of scans close to exponential growth. If alternations are expanded no matter
there is an embedded "/" or not, we could use an algorithm that requires only
one pass of scanning.
> 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
> Attachments: 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.
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
