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https://issues.apache.org/jira/browse/HDFS-1557?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ivan Kelly updated HDFS-1557:
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Status: Patch Available (was: Open)
> Separate Storage from FSImage
> -----------------------------
>
> Key: HDFS-1557
> URL: https://issues.apache.org/jira/browse/HDFS-1557
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: name-node
> Affects Versions: 0.21.0
> Reporter: Ivan Kelly
> Fix For: 0.22.0, 0.23.0
>
> Attachments: HDFS-1557-branch-0.22.diff, HDFS-1557-trunk.diff,
> HDFS-1557-trunk.diff, HDFS-1557.diff
>
>
> FSImage currently derives from Storage and FSEditLog has to call methods
> directly on FSImage to access the filesystem. This JIRA is to separate the
> Storage class out into NNStorage so that FSEditLog is less dependent on
> FSImage. From this point, the other parts of the circular dependency should
> be easy to fix.
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