[jira] [Commented] (HBASE-2376) Add special SnapshotScanner which presents view of all data at some time in the past

["Pritam Damania (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HBASE-2376?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13501602#comment-13501602 ] 

Pritam Damania commented on HBASE-2376:
---------------------------------------

Here are the relevant patches for this feature in the 89fb branch :
http://svn.apache.org/viewvc?view=revision&revision=r1395032
http://svn.apache.org/viewvc?view=revision&revision=r1406789
http://svn.apache.org/viewvc?view=revision&revision=r1410118
                
> Add special SnapshotScanner which presents view of all data at some time in the past
> ------------------------------------------------------------------------------------
>
>                 Key: HBASE-2376
>                 URL: https://issues.apache.org/jira/browse/HBASE-2376
>             Project: HBase
>          Issue Type: New Feature
>          Components: Client, regionserver
>    Affects Versions: 0.20.3
>            Reporter: Jonathan Gray
>            Assignee: Pritam Damania
>
> In order to support a particular kind of database "snapshot" feature which doesn't require copying data, we came up with the idea for a special SnapshotScanner that would present a view of your data at some point in the past.  The primary use case for this would be to be able to recover particular data/rows (but not all data, like a global rollback) should they have somehow been messed up (application fault, application bug, user error, etc.).

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