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From "Lei (Eddy) Xu (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-10225) DataNode hot swap drives should recognize storage type tags.
Date Tue, 19 Jul 2016 20:47:20 GMT

     [ https://issues.apache.org/jira/browse/HDFS-10225?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Lei (Eddy) Xu updated HDFS-10225:
---------------------------------
    Attachment: HDFS-10225.002.patch

Hi, [~cmccabe] and [~arpitagarwal] Thanks for the suggestions. I modified the patch to disallow
changing storage type in the DataNode runtime. 

So that in order to achieve the purpose, user should either restart DN or,  remove the disk
and add it back with a new storage type. 



> 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, HDFS-10225.002.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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