[jira] [Commented] (HDFS-14753) Document HDFS-8432 (Introduce a minimum compatible layout version to allow downgrade in more rolling upgrade use cases)

["Fei Hui (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HDFS-14753?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16919452#comment-16919452 ] 

Fei Hui commented on HDFS-14753:
--------------------------------

[~aajisaka] Thanks for filing this issue. It makes sense.
Where should we document?

> Document HDFS-8432 (Introduce a minimum compatible layout version to allow downgrade in more rolling upgrade use cases)
> -----------------------------------------------------------------------------------------------------------------------
>
>                 Key: HDFS-14753
>                 URL: https://issues.apache.org/jira/browse/HDFS-14753
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: documentation, rolling upgrades
>            Reporter: Akira Ajisaka
>            Priority: Major
>
> After HDFS-8432, we can downgrade to the different layout version if the layout version of the destination is equal to or greater than the minimum compatible layout version of the source. This information is very important for administrators and it needs to be documented.



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