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From "dhruba borthakur (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-3637) Support for snapshots
Date Fri, 05 Sep 2008 19:12:44 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-3637?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12628705#action_12628705
] 

dhruba borthakur commented on HADOOP-3637:
------------------------------------------

Hi Hairong, Thanks. My current proposal would require that the balancer contact the SnapNode
(in additional to the NameNode) to retrieve the list of candidate blocks. Do you think that
it will work?

> Support for snapshots
> ---------------------
>
>                 Key: HADOOP-3637
>                 URL: https://issues.apache.org/jira/browse/HADOOP-3637
>             Project: Hadoop Core
>          Issue Type: New Feature
>          Components: dfs
>            Reporter: dhruba borthakur
>            Assignee: dhruba borthakur
>         Attachments: Snapshots.pdf, Snapshots.pdf
>
>
> Support HDFS snapshots. It should support creating snapshots without shutting down the
file system. Snapshot creation should be lightweight and a typical system should be able to
support a few thousands concurrent snapshots. There should be a way to surface (i.e. mount)
a few of these snapshots simultaneously.

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