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Posted to hdfs-dev@hadoop.apache.org by "Aaron T. Myers (JIRA)" <ji...@apache.org> on 2013/10/03 00:15:44 UTC
[jira] [Resolved] (HDFS-3958) Integrate upgrade/finalize/rollback
with external journals
[ https://issues.apache.org/jira/browse/HDFS-3958?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Aaron T. Myers resolved HDFS-3958.
----------------------------------
Resolution: Duplicate
Resolving as a duplicate of HDFS-5138, which has a lot more discussion about how best to do this.
> 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: namenode
> 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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