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https://issues.apache.org/jira/browse/HBASE-10885?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14049628#comment-14049628
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ramkrishna.s.vasudevan commented on HBASE-10885:
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Sure. Its in the final stages of review. We got lot of new scenarios while
reviewing and also while fixing one we got new types of combinations.
Some small minor logical changes were suggested by Anoop on the final review.
Just discussing them if the changes (if we make it or not) are fine then we can
commit it later today EOD my time. Also Anoop is on travel now so once he
finalises the patch we can be ready for commit.
> Support visibility expressions on Deletes
> -----------------------------------------
>
> Key: HBASE-10885
> URL: https://issues.apache.org/jira/browse/HBASE-10885
> Project: HBase
> Issue Type: Improvement
> Affects Versions: 0.98.1
> Reporter: Andrew Purtell
> Assignee: ramkrishna.s.vasudevan
> Priority: Blocker
> Fix For: 0.99.0, 1.0.0, 0.98.4
>
> Attachments:
> 10885-org.apache.hadoop.hbase.security.visibility.TestVisibilityLabelsWithDeletes-output.txt,
> HBASE-10885_1.patch, HBASE-10885_2.patch, HBASE-10885_new_tag_type_1.patch,
> HBASE-10885_new_tag_type_2.patch, HBASE-10885_v1.patch,
> HBASE-10885_v12.patch, HBASE-10885_v12.patch, HBASE-10885_v13.patch,
> HBASE-10885_v15.patch, HBASE-10885_v2.patch, HBASE-10885_v2.patch,
> HBASE-10885_v2.patch, HBASE-10885_v3.patch, HBASE-10885_v4.patch,
> HBASE-10885_v5.patch, HBASE-10885_v7.patch, HBASE-10885_v8.patch,
> HBASE-10885_v9.patch
>
>
> Accumulo can specify visibility expressions for delete markers. During
> compaction the cells covered by the tombstone are determined in part by
> matching the visibility expression. This is useful for the use case of data
> set coalescing, where entries from multiple data sets carrying different
> labels are combined into one common large table. Later, a subset of entries
> can be conveniently removed using visibility expressions.
> Currently doing the same in HBase would only be possible with a custom
> coprocessor. Otherwise, a Delete will affect all cells covered by the
> tombstone regardless of any visibility expression scoping. This is correct
> behavior in that no data spill is possible, but certainly could be
> surprising, and is only meant to be transitional. We decided not to support
> visibility expressions on Deletes to control the complexity of the initial
> implementation.
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