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https://issues.apache.org/jira/browse/HBASE-1923?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12869733#action_12869733
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Todd Lipcon commented on HBASE-1923:
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Since the HFileOutputFormat just writes KeyValues, delete support should fall 
out "for free". However, the APIs to construct the delete tombstones aren't 
that obvious, so I think it will be an advanced feature. We should follow up 
this JIRA with (a) much better documentation on HFileOutputFormat (b) some 
better wrapper APIs for using it, as KeyValue is pretty low level.

> Bulk incremental load into an existing table
> --------------------------------------------
>
>                 Key: HBASE-1923
>                 URL: https://issues.apache.org/jira/browse/HBASE-1923
>             Project: Hadoop HBase
>          Issue Type: New Feature
>          Components: client, mapred, regionserver, scripts
>    Affects Versions: 0.21.0
>            Reporter: anty.rao
>            Assignee: Todd Lipcon
>
> hbase-48 is about bulk load of a new table,maybe it's more practicable to 
> bulk load aganist a existing table.

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