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https://issues.apache.org/jira/browse/HBASE-2376?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12850609#action_12850609
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dhruba borthakur commented on HBASE-2376:
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@andrew: Yes, the TTAK should default to 0.
@ryan: If we explain that when a user set timestamps, then the TTKAV will apply
to it. If the user dos not set timestamps, then the system will assign a
timestamp to every record and will use it to not delete records within the
TTKAV. do you see any confusion here?
> 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: Hadoop HBase
> Issue Type: New Feature
> Components: client, regionserver
> Affects Versions: 0.20.3
> Reporter: Jonathan Gray
>
> 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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