[jira] Commented: (HDFS-233) Support for snapshots

["dhruba borthakur (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HDFS-233?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12883633#action_12883633 ] 

dhruba borthakur commented on HDFS-233:
---------------------------------------

There hasn't been much work in this direction. It was deemed complex to implement because it needs lots of changes to the current NameNode/DataNode code. I have a proposal in mind that can implement "HDFS snapshots" as a layer on top of the current HDFS code with negligible changes to the existing NameNode/DataNode architecture. 

If you have any ideas regarding this , or is willing to contribute towards this effort, that will be great! Thanks.

> Support for snapshots
> ---------------------
>
>                 Key: HDFS-233
>                 URL: https://issues.apache.org/jira/browse/HDFS-233
>             Project: Hadoop HDFS
>          Issue Type: New Feature
>            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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