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From "Suresh Srinivas (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-3137) Bump LAST_UPGRADABLE_LAYOUT_VERSION
Date Thu, 29 Mar 2012 03:45:49 GMT

    [ https://issues.apache.org/jira/browse/HDFS-3137?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13240950#comment-13240950
] 

Suresh Srinivas commented on HDFS-3137:
---------------------------------------

Eli, I have not reviewed the patch completely. A quick comment. Please keep the version and
corresponding feature name in LayoutVersion.java . Though these versions are not used, it
would be good to keep the history and serves as reference to the features in HDFS.

                
> Bump LAST_UPGRADABLE_LAYOUT_VERSION
> -----------------------------------
>
>                 Key: HDFS-3137
>                 URL: https://issues.apache.org/jira/browse/HDFS-3137
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>            Reporter: Eli Collins
>            Assignee: Eli Collins
>         Attachments: hdfs-3137.txt
>
>
> LAST_UPGRADABLE_LAYOUT_VERSION is currently -7, which corresponds to Hadoop 0.14. How
about we bump it to -16, which corresponds to Hadoop 0.18?
> I don't think many people are using releases older than v0.18, and those who are probably
want to upgrade to the latest stable release (v1.0). To upgrade to eg 0.23 they can still
upgrade to v1.0 first and then upgrade again from there.

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