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Posted to hdfs-issues@hadoop.apache.org by "Aaron T. Myers (JIRA)" <ji...@apache.org> on 2015/04/07 19:50:14 UTC

[jira] [Updated] (HDFS-5223) Allow edit log/fsimage format changes without changing layout version

     [ https://issues.apache.org/jira/browse/HDFS-5223?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Aaron T. Myers updated HDFS-5223:
---------------------------------
    Target Version/s: 3.0.0  (was: )

> Allow edit log/fsimage format changes without changing layout version
> ---------------------------------------------------------------------
>
>                 Key: HDFS-5223
>                 URL: https://issues.apache.org/jira/browse/HDFS-5223
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: namenode
>    Affects Versions: 2.1.1-beta
>            Reporter: Aaron T. Myers
>            Assignee: Colin Patrick McCabe
>         Attachments: HDFS-5223.004.patch
>
>
> Currently all HDFS on-disk formats are version by the single layout version. This means that even for changes which might be backward compatible, like the addition of a new edit log op code, we must go through the full `namenode -upgrade' process which requires coordination with DNs, etc. HDFS should support a lighter weight alternative.



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