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From "Akira Ajisaka (Jira)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-14753) Document HDFS-8432 (Introduce a minimum compatible layout version to allow downgrade in more rolling upgrade use cases)
Date Tue, 20 Aug 2019 08:55:00 GMT

     [ https://issues.apache.org/jira/browse/HDFS-14753?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Akira Ajisaka updated HDFS-14753:
---------------------------------
    Component/s: documentation

> 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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