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From "Jakob Homan (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-4954) Specify node-rack mapping, dfsadmin -report to warn on mismatch
Date Wed, 18 Nov 2009 21:46:39 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-4954?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Jakob Homan updated HADOOP-4954:

    Assignee:     (was: 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 Common
>          Issue Type: Improvement
>          Components: conf
>            Reporter: Marco Nicosia
> 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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