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https://issues.apache.org/jira/browse/HDDS-1266?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16812893#comment-16812893
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Anu Engineer commented on HDDS-1266:
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[~shv] I have attached the design doc for the in place upgrade. You are the
first person who asked for this feature, would appreciate any feedback you
might have on the design, especially if you see any issues from HDFS point of
view that is not addressed.
[~clayb] This is the upgrade design I had taked about in the community
meetings, Please do let me know you thoughts, questions or comments.
[~daryn] If you have time, I would appreciate any comments you have on the
HDFS-to-Ozone in-place upgrades.
Thanks
Anu
> [Ozone upgrade] Support Upgrading HDFS clusters to use Ozone
> ------------------------------------------------------------
>
> Key: HDDS-1266
> URL: https://issues.apache.org/jira/browse/HDDS-1266
> Project: Hadoop Distributed Data Store
> Issue Type: New Feature
> Reporter: Anu Engineer
> Assignee: Anu Engineer
> Priority: Major
> Attachments: InPlaceUpgradesForOzone.pdf
>
>
> This is the master JIRA to support upgrading existing HDFS clusters to have
> Ozone running concurrently. One of the requirements is that we support
> upgrading from HDFS to Ozone, without a full data copy. This requirement is
> called "In Place upgrade", the end result of such an upgrade would be to have
> the HDFS data appear in Ozone as if Ozone has taken a snap-shot of the HDFS
> data. Once upgrade is complete, Ozone and HDFS will act as independent
> systems. I will post a design document soon.
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