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https://issues.apache.org/jira/browse/HDDS-252?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16548357#comment-16548357
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Nanda kumar commented on HDDS-252:
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Thanks [~bharatviswa] for updating the patch.
With this change, we cannot move a volume/disk from one datanode to another as
the datanode uuid is stored as part of each volume. If we move the volume it
will cause inconsistency during datanode startup. We will be having different
datanode uuid in a single datanode and the last volume which is getting
initialized will update the uuid, this will become the node's uuid.
> Eliminate the datanode ID file
> ------------------------------
>
> Key: HDDS-252
> URL: https://issues.apache.org/jira/browse/HDDS-252
> Project: Hadoop Distributed Data Store
> Issue Type: Improvement
> Reporter: Bharat Viswanadham
> Assignee: Bharat Viswanadham
> Priority: Major
> Fix For: 0.2.1
>
> Attachments: HDDS-252.00.patch, HDDS-252.01.patch, HDDS-252.02.patch
>
>
> This Jira is to remove the datanodeID file. After ContainerIO work (HDDS-48
> branch) is merged, we have a version file in each Volume which stores
> datanodeUuid and some additional fields in that file.
> And also if this disk containing datanodeId path is removed, that DN will now
> be unusable with current code.
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