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From "Arpit Agarwal (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-10225) DataNode hot swap drives should recognize storage type tags.
Date Sat, 23 Apr 2016 19:42:13 GMT

    [ https://issues.apache.org/jira/browse/HDFS-10225?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15255358#comment-15255358
] 

Arpit Agarwal commented on HDFS-10225:
--------------------------------------

Hi [~eddyxu], I prefer we disallow changing the storage type of a directory without a restart.
Is there a strong use case for doing this without restarts? Thanks.

> DataNode hot swap drives should recognize storage type tags. 
> -------------------------------------------------------------
>
>                 Key: HDFS-10225
>                 URL: https://issues.apache.org/jira/browse/HDFS-10225
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: datanode
>    Affects Versions: 2.7.2
>            Reporter: Lei (Eddy) Xu
>            Assignee: Lei (Eddy) Xu
>         Attachments: HDFS-10225.000.patch, HDFS-10225.001.patch
>
>
> The current hot swap code only differentiate data dirs by their paths. People might want
to change the types of certain data dirs from the default value in an existing cluster.



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