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https://issues.apache.org/jira/browse/HADOOP-2689?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14631608#comment-14631608
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Allen Wittenauer commented on HADOOP-2689:
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there's a good chance that bash brace expansion already works here:
machine{1..20}.corp
> RegEx support for expressing datanodes in the slaves conf files
> ---------------------------------------------------------------
>
> Key: HADOOP-2689
> URL: https://issues.apache.org/jira/browse/HADOOP-2689
> Project: Hadoop Common
> Issue Type: Improvement
> Components: conf, scripts
> Affects Versions: 0.14.4
> Environment: All
> Reporter: Venkat Ramachandran
> Assignee: Allen Wittenauer
>
> It will be very handy if datanodes and task trackers can be expressed in the
> slave conf file as regular expressions.
> For example,
> machine[1-200].corp
> machine[400-679].corp
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