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Posted to hdfs-issues@hadoop.apache.org by "Konstantin Shvachko (JIRA)" <ji...@apache.org> on 2012/11/02 19:51:16 UTC

[jira] [Comment Edited] (HDFS-2802) Support for RW/RO snapshots in HDFS

    [ https://issues.apache.org/jira/browse/HDFS-2802?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13489643#comment-13489643 ] 

Konstantin Shvachko edited comment on HDFS-2802 at 11/2/12 6:49 PM:
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Thanks for posting meeting notes. Can anybody please elaborate on these topics.
- ** Current design solves single-client consistency but not multiple-client consistency.
- *** Would admins like to restrict based on users as well as directories for snapshots? 
- ** Current design adds extra overhead for every inode,
                
      was (Author: shv):
    Thanks for posting meeting notes. Can anybody please elaborate on these topics.
** Current design solves single-client consistency but not multiple-client consistency.
*** Would admins like to restrict based on users as well as directories for snapshots? 
** Current design adds extra overhead for every inode,
                  
> Support for RW/RO snapshots in HDFS
> -----------------------------------
>
>                 Key: HDFS-2802
>                 URL: https://issues.apache.org/jira/browse/HDFS-2802
>             Project: Hadoop HDFS
>          Issue Type: New Feature
>          Components: data-node, name-node
>            Reporter: Hari Mankude
>            Assignee: Hari Mankude
>         Attachments: HDFS-2802.20121101.patch, HDFS-2802-meeting-minutes-121101.txt, HDFSSnapshotsDesign.pdf, snap.patch, snapshot-design.pdf, snapshot-design.tex, snapshot-one-pager.pdf, Snapshots20121018.pdf, Snapshots20121030.pdf
>
>
> Snapshots are point in time images of parts of the filesystem or the entire filesystem. Snapshots can be a read-only or a read-write point in time copy of the filesystem. There are several use cases for snapshots in HDFS. I will post a detailed write-up soon with with more information.

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