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From "Aaron T. Myers (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-161) DataNode will create missing dfs.data.dir directories contrary to docs
Date Wed, 22 Jun 2011 07:30:47 GMT

     [ https://issues.apache.org/jira/browse/HDFS-161?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Aaron T. Myers updated HDFS-161:

    Labels: newbie  (was: )

> DataNode will create missing dfs.data.dir directories contrary to docs
> ----------------------------------------------------------------------
>                 Key: HDFS-161
>                 URL: https://issues.apache.org/jira/browse/HDFS-161
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: data-node, documentation
>            Reporter: Todd Lipcon
>            Priority: Minor
>              Labels: newbie
> The documentation (and HADOOP-340) seems to indicate that if a data dir listed in dfs.data.dir
does not exist, it will be ignored. In fact, if the hadoop user has access to (essentially)
mkdir -p the data dir it will do so.
> I'd like to add another configuration parameter, perhaps dfs.data.dir.create with default
true (to not break any existing tutorials). If this is set to false then data dirs that do
not exist will not implicitly be created.
> The motivation for this is the same as HADOOP-340 - we have different disk configs in
our cluster and hadoop is creating data dirs where we do not want them.

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