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https://issues.apache.org/jira/browse/HBASE-11054?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13980671#comment-13980671
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ramkrishna.s.vasudevan commented on HBASE-11054:
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bq. The hook here can only blindly create a DeleteTracker and that's not as 
flexible as if instead there is an option to take the tracker allocated by core 
and mix in state
I will update the patch.  I would pass the core DeleteTracker to this hook and 
if the CP creates a new deleteTracker would return that else would return the 
core tracker only.  
Thanks Lars for giving a go ahead with the new hook approach.

> Create new hook in StoreScanner to help user creating his own delete tracker
> ----------------------------------------------------------------------------
>
>                 Key: HBASE-11054
>                 URL: https://issues.apache.org/jira/browse/HBASE-11054
>             Project: HBase
>          Issue Type: Sub-task
>            Reporter: ramkrishna.s.vasudevan
>            Assignee: ramkrishna.s.vasudevan
>             Fix For: 0.99.0, 0.98.2
>
>         Attachments: HBASE-11054.patch
>
>
> In case of Visibility labels, to support deletes we need to consider the 
> visibility expression per version inorder to identify the matching visibility 
> expression.  
> Tracking the visibility tags along with the delete tracker would make things 
> easier rather than handling during scans/compactions.



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