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From "Todd Lipcon (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-3958) Integrate upgrade/finalize/rollback with external journals
Date Wed, 19 Sep 2012 05:04:07 GMT
Todd Lipcon created HDFS-3958:
---------------------------------

             Summary: Integrate upgrade/finalize/rollback with external journals
                 Key: HDFS-3958
                 URL: https://issues.apache.org/jira/browse/HDFS-3958
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: name-node
    Affects Versions: 3.0.0
            Reporter: Todd Lipcon


Currently the NameNode upgrade/rollback/finalize framework only supports local storage. With
edits being stored in pluggable Journals, this could create certain difficulties - in particular,
rollback wouldn't actually rollback the external storage to the old state.

We should look at how to expose the right hooks to the external journal storage to snapshot/rollback/finalize.

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