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From "Konstantin Shvachko (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-4826) Admin command saveNamespace.
Date Thu, 11 Dec 2008 20:48:44 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-4826?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Konstantin Shvachko updated HADOOP-4826:

    Attachment: saveNamespace.patch

Forgot to remove public after doing some testing. Change getName() to getURI(). This makes
sense since I fixed 2 warnings anyway.
I was also thinking about a real shutdown command, don't think we should introduce it now.

> Admin command saveNamespace.
> ----------------------------
>                 Key: HADOOP-4826
>                 URL: https://issues.apache.org/jira/browse/HADOOP-4826
>             Project: Hadoop Core
>          Issue Type: New Feature
>          Components: dfs
>            Reporter: Konstantin Shvachko
>            Assignee: Konstantin Shvachko
>             Fix For: 0.20.0
>         Attachments: saveNamespace.patch, saveNamespace.patch
> It would be useful to have an admin command that saves current namespace.
> This command can be used before regular (planned) cluster shutdown.
> The command will save the namespace into storage directory(s) and reset the name-node
journal (edits file).
> It will also reduce name-node startup time, because edits do not need to be digest.

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