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https://issues.apache.org/jira/browse/HADOOP-4954?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jakob Homan reassigned HADOOP-4954:
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Assignee: Jakob Homan
> Specify node-rack mapping, dfsadmin -report to warn on mismatch
> ---------------------------------------------------------------
>
> Key: HADOOP-4954
> URL: https://issues.apache.org/jira/browse/HADOOP-4954
> Project: Hadoop Core
> Issue Type: Improvement
> Components: conf
> Reporter: Marco Nicosia
> Assignee: Jakob Homan
>
> It would be helpful if the operator had some way to specify what rack a node
> is in, perhaps as an annotation in the dfs.hosts file? Subsequently, if a
> node reports that it is in a different rack than specified, dfsadmin -report
> can issue a warning on that fact.
> An additional warning would also be nice: If a rack is configured to have X
> hosts, but in fact has some significant percentage (configurable?) fewer
> hosts than configured, dfsadmin -report should advert to that fact as well.
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