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From "Todd Lipcon (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HDFS-1557) Separate Storage from FSImage
Date Tue, 01 Feb 2011 17:58:29 GMT

     [ https://issues.apache.org/jira/browse/HDFS-1557?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Todd Lipcon updated HDFS-1557:
------------------------------

    Attachment: 1557-suggestions.txt

Hi Ivan. Here are a few more suggested changes (minor cosmetic fixes) and also a couple of
notes in the code where some things looked strange - I figured it was easier to write these
notes in patch form.

> 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
>            Assignee: Ivan Kelly
>             Fix For: 0.23.0
>
>         Attachments: 1557-suggestions.txt, HDFS-1557-branch-0.22.diff, HDFS-1557-branch-0.22.diff,
HDFS-1557-trunk.diff, HDFS-1557-trunk.diff, HDFS-1557-trunk.diff, HDFS-1557.diff, HDFS-1557.diff,
HDFS-1557.diff, HDFS-1557.diff, HDFS-1557.diff, HDFS-1557.diff, HDFS-1557.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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